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Kongsberg RSER200-4 Serial Line Communication Interface Module | 603444 | 4-Channel Isolated RS-232/422/485 | NMEA0183/MODBUS RTU | Redundant RCU Connection | 24VDC | K-Chief 600/700 | Classification

Kongsberg Maritime RSER200-4 (part no. 603444) Serial Line Communication Interface Module, specifically designed for K-Chief 600/700 marine automation systems, used to connect third-party serial line equipment to RCU (Remote Control Unit). Equipped with 4 independently galvanically isolated serial channels, each channel supports RS-232, RS-422, RS-485 standards (software configurable), supports NMEA 0183, MODBUS RTU, proprietary ASCII and custom protocols, baud rate 300bps-115.2kbps configurable

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Product Details

1. Product Overview

The Kongsberg RSER200-4 (part no. 603444) is a Serial Line Communication Interface Module manufactured by Kongsberg Maritime AS of Norway, and is a standard communication interface device in K-Chief 600/700 series marine automation systems, used to connect third-party serial line equipment to RCU (Remote Control Unit), achieving serial data communication between the marine automation system and various third-party devices such as navigation equipment, sensors, instruments, PLCs, etc.

In modern marine automation systems, in addition to Kongsberg's own equipment, there is also a need to integrate a large number of third-party manufacturer's equipment, such as GPS, compass, echo sounder, anemometer/wind vane, rudder angle indicator, main engine remote control system, auxiliary engine PLC, tank gauging system, etc. These devices usually output data through serial interfaces such as RS-232, RS-422, RS-485, using protocols such as NMEA 0183, MODBUS RTU. The RSER200-4 is precisely the communication gateway module designed to integrate these third-party serial devices into the K-Chief system. It converts serial line data into K-Chief system internal Link bus data, transmitting to the RCU controller for processing and display.

The RSER200-4 is equipped with 4 independent serial communication channels, each with galvanic isolation, which can effectively prevent ground loop interference and common-mode voltage effects between different devices, improving communication reliability. Each channel's interface standard can be software-configured as RS-232, RS-422, or RS-485, adapting to different device interface requirements. Supported communication protocols include NMEA 0183 (standard protocol for marine navigation equipment), MODBUS RTU (standard protocol for industrial instruments and PLCs), proprietary ASCII protocol, and custom protocols, meeting the communication needs of most third-party serial devices on ships. Each channel's baud rate can be independently configured, ranging from 300 bps to 115.2 kbps, adapting to different device communication rates.

In terms of system connection, the RSER200-4 communicates with the RCU controller via the Link interface. The Link interface uses RS-422 standard, communication rate 1 Mbps, maximum transmission distance 100 meters, line capacitance requirement not exceeding 50 pF/m. One RSER200-4 module can simultaneously connect up to 3 RCU controllers (labeled A, B, C), supporting single controller and redundant controller systems. In redundant controller configuration, the RSER200-4 can simultaneously transmit data to both the main controller and the backup controller, ensuring communication is not interrupted during controller switchover, improving system reliability.

The RSER200-4 has a built-in USB 2.0 Full Speed (12 Mbps) service interface, using USB Type-B connector, with transient suppressor protection, for direct module communication, testing, debugging, firmware upgrade, and maintenance service. Technicians can directly connect a laptop via the USB interface to configure and diagnose the module, without going through the RCU system, facilitating on-site maintenance and troubleshooting.

The module has a built-in hardware watchdog. When the module program is abnormal or deadlocked, the watchdog automatically resets the module program, ensuring the module resumes normal operation, improving system availability and reliability. The module also has comprehensive self-diagnostic functions, can monitor communication status, channel status, power status, etc., fault information can be uploaded to the RCU system, facilitating maintenance personnel to quickly locate faults.

In terms of electrical performance, the RSER200-4 adopts +24 V DC nominal power supply, operating voltage range +18 V to +32 V DC, adapting to ship power grid voltage fluctuations. Typical operating current is about 120 mA (approx. 2.9 W), low power consumption, low heat generation, suitable for long-term continuous operation. Operating temperature range is -25°C to +70°C, storage temperature -40°C to +85°C, can operate stably in high-temperature environments such as ship engine rooms. Protection rating is IP20 (module level), designed for installation in control cabinets.

In terms of mechanical structure, the RSER200-4 adopts modular design, same 外形 dimensions as other K-Chief system modules (such as RHUB200-5), adopts horizontal dual-rail system mounting, simple and quick installation and removal, facilitating on-site maintenance and replacement. Module weight is approximately 0.8 kg, compact structure, suitable for dense installation in control cabinets.

The RSER200-4, as a standard component of K-Chief 700 and K-Safe systems, has obtained type approval from major classification societies such as DNV-GL, ABS, LR, BV, etc. Widely used in automation systems on various commercial ships, offshore platforms, special vessels, is the standard communication interface for third-party serial devices to access K-Chief systems. The product is genuine Kongsberg original, with a 12-month quality warranty.

2. Specifications

表格

Parameter	Value
Brand	Kongsberg Maritime AS (Norway)
Model	RSER200-4
Part No.	603444
Product Type	Serial Line Communication Interface Module
Applicable System	K-Chief 600/700 marine automation systems, K-Safe safety system
Common Revision	REV 1.0.4 (other revisions may exist)
Function	Connect third-party serial line equipment to RCU, achieving serial data communication integration
Number of Serial Channels	4 independent channels
Serial Interface Standard	RS-232, RS-422, RS-485 (software configurable per channel)
Electrical Isolation	Independent galvanic isolation per channel (reference 2.5 kV)
Supported Protocols	NMEA 0183, MODBUS RTU, proprietary ASCII, custom protocols
Baud Rate	300 bps ~ 115.2 kbps (independently configurable per channel, max rate to be confirmed)
Data Bits/Stop Bits/Parity	To be confirmed (reference configurable 7/8 data bits, 1/2 stop bits, None/Even/Odd parity)
Link Interface (to RCU)	RS-422, 1 Mbps, max transmission distance 100 m, line capacitance ≤ 50 pF/m
Number of Connectable RCUs	Up to 3 RCU controllers (A, B, C), supports single and redundant controller systems
USB Service Interface	USB 2.0 Full Speed, 12 Mbps, USB Type-B connector, with transient suppressor protection, for testing and service
Hardware Watchdog	Built-in, automatically resets on program abnormality
Self-Diagnostic	Supports communication status, channel status, power status monitoring and fault reporting
Supply Voltage	+24 V DC nominal, operating range +18 V ~ +32 V DC
Typical Operating Current	Approx. 120 mA (approx. 2.9 W)
Max Power Consumption	To be confirmed (reference < 5 W)
Reverse Polarity Protection	To be confirmed
Over-Current Protection	To be confirmed
Operating Temperature	-25°C ~ +70°C
Storage Temperature	-40°C ~ +85°C
Humidity	To be confirmed (reference 5% ~ 95% RH non-condensing)
Protection Degree	IP20 (IEC 60529, module level)
Housing Material	Metal or industrial plastic (to be confirmed)
Dimensions	To be confirmed (reference same series standard module size as RHUB200-5, subject to actual product)
Weight	Approximately 0.8 kg
Mounting Method	Horizontal Dual-Rail System
Cooling Method	Natural cooling (fanless)
Firmware Upgrade	Supports upgrade via USB service interface or system network
Configuration Tool	To be confirmed (via K-Chief system configuration software or dedicated configuration tool)
Classification Society Certification	DNV-GL, ABS, LR, BV (as K-Chief system component)
EMC Standard	To be confirmed (reference IEC 60945 related EMC requirements, CISPR 22)
Vibration & Shock	To be confirmed (meets marine environment requirements)
Official Documentation	RSER200-4 Hardware Description
Country of Origin	To be confirmed (Norway or Kongsberg global manufacturing base)
HS Code	To be confirmed (reference 85176200 or 85437090, communication interface module)
Stock Status	Order available
Warranty Period	12 months

3. Key Features

4-Channel Independently Isolated Serial Interface — Equipped with 4 independent serial communication channels, each with galvanic isolation, effectively preventing ground loop interference and common-mode voltage effects between different devices, improving communication reliability. Each channel's interface standard can be software-configured as RS-232, RS-422, or RS-485, adapting to different third-party device interface requirements. One module can simultaneously integrate multiple devices with different interface types.
Multi-Protocol Support, Covering Mainstream Marine Equipment — Supports NMEA 0183 (standard protocol for marine navigation equipment), MODBUS RTU (standard protocol for industrial instruments and PLCs), proprietary ASCII protocol, and custom protocols, meeting communication needs of most third-party serial devices on ships, including GPS, compass, echo sounder, anemometer/wind vane, rudder angle indicator, main engine remote control, auxiliary engine PLC, tank gauging, etc. Is the standard communication gateway for third-party devices to access K-Chief systems.
Per-Channel Independently Configurable Baud Rate — Each channel's baud rate can be independently configured, ranging from 300 bps to 115.2 kbps, adapting to different device communication rate requirements. Data bits, stop bits, parity and other parameters can also be configured according to device requirements (specific range to be confirmed), flexibly adapting to communication parameters of various old and new devices, no additional protocol converter required.
Redundant RCU Connection, High Reliability — Module can simultaneously connect up to 3 RCU controllers (A, B, C) via Link interface, supports single controller and redundant controller systems. In redundant controller configuration, RSER200-4 can simultaneously transmit data to both main and backup controllers, ensuring communication is not interrupted during controller switchover, meeting high reliability requirements of critical ship systems. Link interface uses RS-422 standard, 1Mbps communication rate, max transmission distance 100m.
Built-in USB Service Interface, Easy Maintenance — Built-in USB 2.0 Full Speed (12Mbps) service interface, USB Type-B connector, with transient suppressor protection. Technicians can directly connect a laptop via USB interface to configure, debug, diagnose, upgrade firmware, and perform maintenance service on the module, without going through RCU system, facilitating quick on-site troubleshooting and maintenance, reducing downtime.
Hardware Watchdog and Self-Diagnostic — Built-in hardware watchdog, when module program is abnormal or deadlocked, watchdog automatically resets module program, ensuring module resumes normal operation. Module has comprehensive self-diagnostic functions, can real-time monitor communication status, channel status, power status, etc., fault information automatically uploaded to RCU system, facilitating maintenance personnel to quickly locate faults, improving system availability.
Wide Voltage Low Power, Marine-Grade Adaptability — Adopts +24V DC nominal power supply, operating voltage range +18V to +32V DC, adapting to ship power grid voltage fluctuations. Typical operating current approx. 120mA (approx. 2.9W), low power consumption, low heat generation, suitable for long-term continuous operation. Operating temperature -25°C to +70°C, storage temperature -40°C to +85°C, can operate stably in high-temperature environments such as ship engine rooms, natural cooling fanless design, no moving parts, high reliability.
Modular Dual-Rail Mounting, System Compatible — Adopts modular design, same 外形 dimensions and mounting method as other K-Chief system modules (such as RHUB200-5), adopts horizontal dual-rail system mounting, simple and quick installation and removal, facilitating on-site maintenance and replacement. Module weight approx. 0.8kg, compact structure, suitable for dense installation in control cabinets, can be mixed with other K-Chief modules in the same control cabinet.
K-Chief System Original Factory Adaptation — Specifically designed for K-Chief 600/700 marine automation systems and K-Safe safety system, perfectly compatible with RCU controllers, operator workstations, remote I/O modules, etc., plug-and-play, no additional development and integration required, ensuring complete compatibility and optimal communication performance with K-Chief systems, is the standard option for third-party devices to access K-Chief systems.
Multiple Classification Society Certifications, Globally Applicable — As a standard component of K-Chief 700 and K-Safe systems, obtained type approval from major international classification societies such as DNV-GL, ABS (American Bureau of Shipping), LR (Lloyd's Register), BV (Bureau Veritas), etc. Products meet regulatory requirements of global classification societies, can be applied to ships and offshore platforms flying any flag, no additional certification required.

4. Typical Applications

Marine Navigation Equipment Integration: Integrate serial data from GPS, DGPS, compass (gyro/magnetic), echo sounder, anemometer/wind vane, rudder angle indicator, log, AIS, radar and other navigation equipment into K-Chief system, achieving centralized display, recording and alarm of navigation data
Marine Sensor and Instrument Integration: Integrate serial data (MODBUS RTU protocol) from various temperature, pressure, level, flow, speed, vibration sensors and display instruments into K-Chief system, achieving centralized monitoring and trend analysis of process parameters
Main Engine Remote Control System Communication: Integrate serial data from main engine remote control system, main engine safety system, electronic governor and other main engine related equipment into K-Chief system, achieving centralized monitoring and alarm management of main engine operating status
Auxiliary Engine PLC Communication: Integrate PLCs (such as MODBUS RTU protocol) of diesel generator sets, air compressors, oil separators, boilers, HVAC and other auxiliary engines into K-Chief system, achieving centralized monitoring and control of auxiliary engine operating status
Tank Gauging System Integration: Integrate serial data from tank gauging systems of cargo tanks, ballast tanks, fuel oil tanks, lubricating oil tanks, fresh water tanks into K-Chief system, achieving centralized display, alarm and calculation of whole-ship tank levels
Ship Power Station Automation Communication: Integrate serial data from ship main switchboard, emergency switchboard, power management system (PMS) into K-Chief system, achieving centralized monitoring of generator operating parameters, load distribution, circuit breaker status
Ship HVAC System Communication: Integrate serial data from ship HVAC system controllers (PLC or dedicated controllers) into K-Chief system, achieving centralized monitoring of fan operation, temperature regulation, damper control, filter status
Ship Safety System Communication: Integrate serial data from fire alarm, combustible gas detection, flooding monitoring, smoke detection and other safety systems into K-Chief system (need to confirm system integration method), achieving centralized display and management of safety alarms
Third-Party Device Protocol Conversion: As protocol converter, convert third-party device data using different serial protocols (NMEA 0183, MODBUS RTU, proprietary ASCII) into K-Chief system internal format, achieving unified integration of heterogeneous devices
Offshore Platform Automation Communication: In K-Chief automation systems on offshore drilling platforms, production platforms, FPSO, FSRU and other offshore facilities, integrate serial data from various third-party process equipment, instruments, PLCs into the system, achieving centralized monitoring of platform production processes
Special Vessel Equipment Communication: Integrate serial data from dedicated equipment (such as scientific research equipment, DP auxiliary equipment, engineering machinery equipment) on research vessels, icebreakers, engineering vessels, naval auxiliary vessels, salvage vessels and other special vessels into K-Chief system
Old System Upgrade and Retrofit: When upgrading old ship automation systems to K-Chief systems, use RSER200-4 to retain and integrate existing third-party serial equipment, protecting existing investments, reducing equipment replacement costs
New Shipbuilding System 配套: Supporting communication interface modules for newly built ship K-Chief 600/700 automation systems, configured quantity and channel allocation according to system design, for third-party device integration
Ship Data Recording and Analysis: After integrating third-party device serial data into K-Chief system, utilize system's data recording and historical trend functions to achieve long-term recording, analysis and report generation of equipment operating data

5. Model Explanation

Product Model: RSER200-4

Part No.: 603444

Product Description: Serial Line Communication Interface Module, for K-Chief 600/700 Marine Automation System

Model code breakdown:

R: Remote series code
SER: Serial identifier, indicating serial communication interface
200: Series model code (200 series, same series as RHUB200-5)
-4: Channel count configuration, indicating 4 serial channels

Common Hardware Revisions:

表格

Revision	Description
REV 1.0.4	Common hardware revision
Other revisions	Other revisions may exist, specific subject to actual product

Official Documentation:

RSER200-4 Hardware Description
Module can connect up to 3 controllers (A, B, C), supports single and redundant controller systems
Manufacturer: Kongsberg Maritime AS, P.O. Box 483, NO-3601 Norway

Key Parameters Summary:

表格

Parameter	Value
Type	Serial Line Communication Interface Module
Serial Channels	4 independent isolated channels
Interface Standard	RS-232/422/485 (configurable)
Protocols	NMEA 0183, MODBUS RTU, ASCII, custom
Baud Rate	300-115.2kbps (configurable per channel)
Link Interface	RS-422, 1Mbps, 100m
Connectable RCUs	Up to 3 (A/B/C)
USB Service Port	USB 2.0, 12Mbps
Power Supply	24VDC (18-32V)
Power Consumption	Approx. 2.9W (typical)
Operating Temperature	-25°C ~ +70°C
Protection	IP20
Mounting	Horizontal dual-rail
Weight	Approx. 0.8kg
Certification	DNV-GL, ABS, LR, BV

Related Models in Same Series (reference):

表格

Model	Description
RSER200-4	This product, Serial Line Communication Interface Module (4 channels)
RHUB200-5	Communication HUB and Repeater (5-port RBUS)
RCU 502i/602	Remote Control Unit (main controller)
RMP420	Remote Multipurpose I/O Module (32 channels)
RDIOR420	Remote Digital I/O and Relay Module (32 channels)

Brand: Kongsberg Maritime AS, global leading marine automation and ocean technology company, headquartered in Norway

6. Installation & Usage Instructions

Pre-Installation Preparation:

Confirm RSER200-4 model and hardware revision match system requirements
Confirm quantity of third-party devices to be integrated, interface type (RS-232/422/485), protocol (NMEA0183/MODBUS RTU etc.), baud rate and other communication parameters
Prepare installation tools (screwdriver, wire stripper, crimping tool, multimeter, etc.)
Prepare serial communication cables (shielded twisted pair, select according to interface type)
Prepare Link bus cable (connect to RCU, shielded twisted pair, RS-422)
Prepare USB cable (for configuration and debugging, USB Type-A to USB Type-B)
Read RSER200-4 Hardware Description and K-Chief system installation manual

Installation Notes:

Installation and wiring must be performed in de-energized state, ensure safety
Wear anti-static wrist strap to avoid electrostatic damage to module circuit
RSER200-4 has IP20 protection rating, must be installed inside control cabinet, avoid direct exposure to humid, dusty, corrosive gas environments
Control cabinet should have appropriate protection rating and ventilation and heat dissipation conditions
Module adopts horizontal dual-rail system mounting, ensure mounting rails are secure, module has good contact with rails
Leave appropriate heat dissipation space between modules (reference at least 10-20mm spacing)
Avoid installing module directly above heating elements (such as transformers, braking resistors, high-power relays)
Keep away from strong interference sources (such as frequency converters, transformers, contactors), or take shielding measures
Serial communication cables use shielded twisted pair, routed separately from power cables, avoid parallel routing
Shield grounded at one end, avoid forming ground loop
RS-485 bus must have termination resistors at both ends (usually 120Ω), intermediate nodes do not connect
Link bus (to RCU) also needs attention to termination resistors and shield grounding
Before first power-on, check all wiring, confirm voltage polarity correct, no short circuit

Wiring Instructions:

Power Wiring: +24V DC power supply connected to power terminals, pay attention to positive and negative polarity, operating voltage range 18-32V, use appropriate cable cross-section
Link Bus Wiring (to RCU):
- Link interface uses RS-422 standard, connects to RCU controller
- Can connect up to 3 RCUs (A, B, C), connect according to system configuration
- Use shielded twisted pair, pay attention to A/B/TX+/TX- signal line polarity
- Termination resistors at both ends of bus
- Max transmission distance 100m, line capacitance ≤ 50 pF/m
Serial Channel Wiring (4 channels):
- RS-232: Connect TX (transmit), RX (receive), GND (signal ground), pay attention to cross-connection of TX/RX
- RS-422: Connect TX+, TX-, RX+, RX-, full-duplex communication
- RS-485: Connect D+ (Data+), D- (Data-), half-duplex communication, termination resistor 120Ω at both ends of bus
- Each channel independently wired, galvanic isolation between channels
- Use shielded twisted pair, shield grounded at one end
- Note that wiring definitions of different devices may vary, refer to device manual
USB Service Interface: USB Type-B connector, for configuration and debugging, may not be connected during normal operation
Grounding Wiring: Module protective grounding terminal reliably connected to control cabinet grounding bar
All wiring terminals should be tight and reliable, avoid virtual connections
After wiring completion, check all wiring, confirm correct before power-on

Configuration & Commissioning:

Confirm all wiring is correct and module is installed in place
Turn on +24V DC power, observe module power indicator and status indicator
Connect laptop via USB service interface (if local configuration needed), or configure remotely via K-Chief system configuration software
Configure module address, Link bus parameters, communication rate, etc.
Configure parameters for 4 serial channels:
- Interface type (RS-232/422/485)
- Baud rate (300-115.2 kbps)
- Data bits, stop bits, parity
- Protocol type (NMEA 0183/MODBUS RTU/ASCII/custom)
- Other protocol related parameters (such as MODBUS station address, data mapping, etc.)
Download configuration to RSER200-4
Test Link communication: confirm module communicates normally with RCU controller, redundant connections all work normally
Test each serial channel:
- Connect corresponding third-party device
- Confirm communication established, data normally transmitted/received
- Confirm device data received in K-Chief system
- Test data accuracy and real-time performance
Test redundancy function: disconnect one RCU connection, confirm communication is not interrupted
Test self-diagnostic: simulate communication fault, confirm module reports fault information
Save configuration file, make configuration backup
Record module installation location, address, channel configuration, connected device list, etc., include in system documentation

Usage Notes:

Module configuration should be completed by professional technicians familiar with K-Chief systems and serial communication
Do not arbitrarily change configured communication parameters, changes may cause communication interruption
When plugging/unplugging serial cables, should first power off or confirm device supports hot-plug
Keep USB service interface cover closed (if any), prevent dust and moisture ingress
Do not block ventilation holes (if any) during module operation
Regularly check communication status, pay attention to communication fault alarms in system
If replacing third-party device, should confirm new device's communication parameters match module configuration, reconfigure module if necessary
For MODBUS RTU communication, should pay attention to unique station address, avoid address conflicts
For NMEA 0183 communication, should pay attention to Talker ID and sentence format, ensure system can correctly parse

Maintenance Recommendations:

Regularly (recommended every 6-12 months) check module operating status, indicator status
Regularly check wiring terminals for looseness, especially in high-vibration areas and serial communication terminals
Regularly check Link bus connectors and termination resistors are normal
Regularly backup system configuration files and module configuration
Recommended to stock 1-2 RSER200-4 modules as ship spare parts for quick replacement in case of failure
When module fails, can quickly recover by replacing spare part, faulty module sent for professional repair
Keep control cabinet clean, dry, well-ventilated, regularly clean dust
Avoid plugging/unplugging module while energized
When upgrading K-Chief system software, confirm RSER200-4 firmware compatibility, upgrade module firmware via USB interface if necessary
For serial channels not used for a long time, should be properly handled, unconnected terminals should be insulated

Safety Notes:

Module operates at 24V DC safety voltage, but connected third-party devices may be in high-voltage state (such as AC 220V instruments, PLC), pay attention to high-voltage hazard of related devices during maintenance
Maintenance of communication modules involved in ship safety systems (such as fire alarm, general alarm) must follow ship safety management regulations, notify captain and duty personnel if necessary
Wait for module to fully discharge after power-off before plugging/unplugging
When replacing module, first disconnect power and all communication connections, then remove
Discarded electronic modules should be disposed of per ship garbage management regulations and e-waste regulations

7. Why Choose Us

Professional Procurement Channel, Quality Guaranteed — All products obtained through professional procurement channels, ensuring genuine Kongsberg original products, with product identification and quality documents, provides 12-month quality warranty. Appearance check, model confirmation, and power-on test performed before shipment, ensuring delivered products are intact, model-accurate, and functional.
Worldwide Delivery — Supports DHL, FedEx, UPS and other international couriers. Can also ship via your designated freight forwarder to 200+ countries, can arrange ship port delivery. Module products use shock-proof and moisture-proof professional packaging, ensuring transportation safety.
Professional Technical Support — Provides selection consultation (confirming channel quantity requirements, interface type configuration, protocol compatibility, RCU connection method), installation guidance, communication configuration support, protocol debugging assistance, fault diagnosis, and spare part replacement suggestions, helping you correctly integrate third-party devices and maintain communication modules.
Flexible Procurement — Supports single module procurement and bulk project orders, tiered pricing discounts with quantity. Can provide new shipbuilding project-specific quotations, ship spare part packages (RSER200-4 + related communication modules + accessories combination), and annual spare part framework agreements.
Pre-shipment Inspection — Appearance check, packaging verification, model confirmation, revision check, and power-on test (power test, serial channel test, Link interface test, USB interface test) performed before shipment, ensuring delivered products have accurate configuration, normal functions, and are intact.

8. Frequently Asked Questions (FAQ)

Q1: What is this RSER200-4? What is the difference from ordinary serial device servers?

A: The RSER200-4 is a Serial Line Communication Interface Module, which is a dedicated communication interface device for Kongsberg K-Chief 600/700 marine automation systems, used to connect third-party serial devices (RS-232/422/485) to the RCU controller of K-Chief systems.

Difference from ordinary serial device servers:

表格

Comparison Item	RSER200-4	Ordinary Serial Device Server
System Adaptation	Specifically designed for K-Chief system, directly communicates with RCU	General product, usually converts to Ethernet
Host Interface	Link bus (RS-422, 1Mbps) directly to RCU	Ethernet (TCP/IP)
Redundancy Support	Can connect up to 3 RCUs, supports redundant controller system	Usually single network port, no system-level redundancy
Protocol Processing	Built-in NMEA0183/MODBUS RTU protocol parsing, data converted to system format	Usually only transparent transmission, protocol parsing done by host
Classification Society Certification	Obtained DNV/ABS/LR/BV certification as K-Chief component	Usually no classification society certification
Mounting Method	Horizontal dual-rail, unified with other K-Chief modules	DIN rail or other
Maintenance Interface	Built-in USB service interface, convenient for on-site debugging	Usually configured via network port
Watchdog/Self-Diagnostic	Built-in hardware watchdog and comprehensive self-diagnostic	Some have, limited functions

Simply put: An ordinary serial device server is a general device that converts serial ports to Ethernet, while the RSER200-4 is a dedicated serial interface module for K-Chief systems, directly communicating with RCU, supporting redundant controllers, with classification society certification, protocol parsing and data mapping completed within the module. It is the standard solution for integrating third-party serial devices into K-Chief systems. If your K-Chief system needs to integrate third-party serial devices, you should use the RSER200-4, not an ordinary serial device server.

Q2: How many serial ports does RSER200-4 have? What interfaces and protocols does it support?

A: The RSER200-4 is equipped with 4 independent serial communication channels, detailed specifications for each channel are as follows:

Interface Standard (configurable per channel):

RS-232: Full-duplex, point-to-point communication, distance usually ≤ 15 meters
RS-422: Full-duplex, differential signal, distance up to 1200 meters (at low baud rate)
RS-485: Half-duplex, differential signal, multi-point bus, distance up to 1200 meters, up to 32 nodes (expandable with repeaters)

Supported Protocols:

NMEA 0183: Standard protocol for marine navigation equipment, suitable for GPS, compass, echo sounder, anemometer/wind vane, AIS and other navigation devices
MODBUS RTU: Standard protocol for industrial automation, suitable for PLCs, instruments, sensors, frequency converters and other industrial devices
Proprietary ASCII Protocol: Custom ASCII text protocol of some device manufacturers
Custom Protocol: Can configure custom protocol format according to special device requirements

Communication Parameters (independently configurable per channel):

Baud rate: 300 bps ~ 115.2 kbps
Data bits: reference 7 or 8 bits (specific range to be confirmed)
Stop bits: reference 1 or 2 bits (specific range to be confirmed)
Parity: reference None/Even/Odd (specific range to be confirmed)

Electrical Isolation:

Each channel independently galvanically isolated, reference isolation voltage 2.5 kV
Isolation between channels, and between channels and system, preventing ground loops and common-mode interference

Note: The 4 channels can be respectively configured as different interface types, protocols, and baud rates, for example channel 1 connects GPS (RS-232/NMEA0183/4800bps), channel 2 connects PLC (RS-485/MODBUS RTU/9600bps), channel 3 connects echo sounder (RS-422/NMEA0183/9600bps), channel 4 connects backup device.

Q3: How does RSER200-4 connect to RCU? Does it support redundancy?

A: The RSER200-4 connects to RCU controller via Link interface, supports single and redundant controller systems.

Link Interface Specifications:

Interface Standard: RS-422 (differential signal)
Communication Rate: 1 Mbps
Max Transmission Distance: 100 meters
Line Requirement: Shielded twisted pair, line capacitance ≤ 50 pF/m
Termination Resistor: Termination resistors at both ends of bus

Connection Methods:

Single controller system: RSER200-4's Link interface connects to a single RCU controller
Redundant controller system: RSER200-4 can simultaneously connect up to 3 RCU controllers (labeled A, B, C), usually connects main controller (A) and backup controller (B), the third (C) can be used for expansion or special configuration
Module has corresponding Link connectors, connect to corresponding RCU according to labels

Redundancy Working Principle:

In redundant controller system, RSER200-4 simultaneously transmits serial device data to both main controller (A) and backup controller (B)
When main controller works normally, data processed by main controller
When main controller fails or switches, backup controller automatically takes over. Since RSER200-4 simultaneously transmits data to backup controller, communication is not interrupted and data is not lost during switchover
This design ensures high availability of critical systems, meeting redundancy requirements of marine automation systems

Wiring Notes:

Link bus uses shielded twisted pair, A/B lines (or TX+/TX-) polarity cannot be reversed
Termination resistors (usually 100Ω or 120Ω, refer to system documentation) must be installed at both ends of bus, intermediate nodes do not connect
Shield grounded at one end, avoid forming ground loop
Max distance 100 meters, repeater or adjusted solution needed if exceeding distance
When connecting multiple RCUs, pay attention to corresponding connector labels (A/B/C) for each RCU, do not connect wrong

Q4: How to configure this module? Does it require professional personnel?

A: Configuration of RSER200-4 includes three parts: hardware installation, wiring, and software configuration.

Configuration Methods:

Via K-Chief system configuration software: Configure RSER200-4 parameters in K-Chief engineer station system configuration software, including module address, channel interface type, baud rate, protocol, data mapping, etc. Configuration downloaded to system then issued to module by RCU
Via USB service interface local configuration: Connect laptop to module's USB Type-B interface with USB cable, use dedicated configuration tool to directly configure module parameters, suitable for on-site debugging and maintenance

Configuration Contents:

Module address and name
Link bus parameters
For each serial channel:
- Interface type (RS-232/422/485)
- Baud rate, data bits, stop bits, parity
- Protocol type (NMEA0183/MODBUS RTU/ASCII/custom)
- Protocol related parameters (such as MODBUS station address, register mapping, NMEA sentence filtering, etc.)
- Data mapping (map received data to K-Chief system variables and tags)

Does it require professional personnel?

Hardware installation and wiring: Can be completed by ship electrician or automation technician, requires basic knowledge of electrical installation and serial communication wiring
Software configuration and commissioning: Recommended to be completed by professional technicians familiar with K-Chief systems and serial communication protocols, because involves professional content such as protocol parsing, data mapping, system integration
Especially MODBUS RTU protocol configuration requires understanding register mapping, data types, function codes, etc., NMEA 0183 requires understanding sentence format, these all require professional knowledge
If it is a simple spare part replacement (same model replacement, configuration unchanged), usually only installation and wiring needed, configuration automatically restored from system, no reconfiguration required
We provide configuration guidance and technical support, can assist your technicians in completing configuration and commissioning

Q5: Is this product in stock? What is the lead time? What is the price?

A: This model is currently in order available status, standard lead time 4-8 weeks (ordered through professional procurement channels or allocated from global inventory). The RSER200-4 is a dedicated marine automation communication interface module, with limited stock inventory, usually requiring procurement to order or allocation from global inventory.

Price: Specific price subject to our formal quotation, price depends on hardware revision, quantity, whether includes configuration service, supply channel and other factors. Bulk procurement can enjoy tiered discounts.
Expedited service: If you have urgent needs (such as ship failure in port, tight shipping schedule, PSC inspection deficiency rectification, urgent third-party device integration), we can try to coordinate global stock inventory or expedited ordering, specific please contact our sales team.
Please indicate required quantity, hardware revision, type and quantity of devices to be integrated, ship model, installation area, desired delivery time, and destination port when inquiring, we will do our best to coordinate the fastest delivery solution and optimal price.

Q6: How to judge and replace a faulty RSER200-4? Does it need reconfiguration?

A: Fault judgment methods:

Power failure: Module has no indication, power indicator off → may be power failure, power cord loose, fuse blown, or module internal power damage
Link communication failure: Module power normal but K-Chief system shows module offline or communication interruption → may be Link cable failure, RCU interface failure, module Link interface damage, termination resistor issue, or system configuration issue
Serial channel failure: A certain channel communication interrupted, corresponding third-party device data lost → may be serial cable failure, third-party device failure, channel interface damage, configuration parameter changed, or protocol mismatch
All channels simultaneously faulty: All 4 channels communication abnormal simultaneously → may be module failure, power issue, Link communication issue, or system configuration issue
Intermittent failure: Communication occasionally interrupted, data packet loss → may be loose wiring, interference, termination resistor issue, power instability, or module hardware aging
System error: K-Chief system shows module hardware failure, self-test failed → may be module hardware failure or firmware corruption
USB interface unable to connect: Unable to connect module via USB service interface → may be USB cable failure, driver issue, module USB interface damage, or module frozen

Replacement steps:

Notify duty personnel and captain (if 涉及 critical systems), explain that module replacement will be performed
If module connects critical devices, first confirm system status, take temporary alternative measures if necessary
Disconnect module power and all communication connections (Link bus, 4 serial channels, USB)
Mark all cable connection positions (or take photos for record), especially corresponding relationship of serial channels
Remove faulty module from dual-rail
Install new module on dual-rail, ensure secure installation
Restore all cable connections per marks (power, Link bus, 4 serial channels)
Turn on power, observe module startup and indicators
Confirm module communication with RCU normal, system recognizes module
Test each serial channel: confirm corresponding third-party device communication restored, data normal
Test redundant connection (if any): confirm both main and backup RCU communication normal
If module has address or configuration needing manual setting, confirm configuration correct via USB interface or system software
Record replacement date, new module serial number, revision number, include in system documentation

Regarding reconfiguration:

If same model same revision replacement: Usually no reconfiguration required, module automatically obtains configuration from RCU or system after accessing system, original channel parameters and data mapping automatically take effect. But recommended to check system configuration, confirm module address and channel configuration correct
If different revision replacement: May need to update module model and revision information in system configuration software, confirm function compatibility, upgrade system software or module firmware if necessary
If adding new module (not in original system): Need to add module in system configuration software, configure address, configure interface parameters and protocol for each channel, set data mapping, this requires professional technicians
After replacing serial device: If replacing third-party device (not module), should confirm new device's communication parameters match module channel configuration, reconfigure channel parameters if necessary
Recommendation: After replacement, perform comprehensive communication test, confirm all serial channels and Link communication normal, third-party device data accurate. If unsure about configuration, recommended to consult professional technicians