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ABB RTD1 1MRS050644A1 RTD Analog Input Module | Pt100 Temperature Input | 16-bit Accuracy | 24VDC | Relion Protection System | Order Available

Original ABB RTD1 (order no. 1MRS050644A1) RTD analog input module, specifically designed for ABB Relion protection and control systems (such as REM 543/545, REM 610, etc.), for Resistance Temperature Detector (RTD) and analog signal acquisition. Supports Pt100 platinum RTD (3-wire, 0~+400°C), 4-20mA current, 0-10V voltage and other input types, 16-bit resolution, accuracy ≤0.1% full scale, sampling rate 100 samples/second. 24V DC power supply, electrical isolation on input circuits, built-in su
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Product Details

1. Product Overview

The ABB RTD1 (order no. 1MRS050644A1) is an RTD analog input module specifically designed for ABB Relion protection and control systems, used for Resistance Temperature Detector (RTD) and other analog signal acquisition and processing. This module belongs to ABB's protection and control device expansion I/O module series, and can be used with ABB protection relays such as REM 543, REM 545, REM 610, etc., to 实现 temperature monitoring, analog acquisition, and process quantity monitoring functions.

This module supports multiple input types, including Pt100 platinum RTD temperature sensors (3-wire connection, measuring range 0°C ~ +400°C), 4-20mA DC current signals, and 0-10V DC voltage signals, flexibly adapting to common temperature sensors and analog transmitters in industrial fields. The module uses a 16-bit high-resolution A/D converter, with measurement accuracy up to ±0.1% full scale and a sampling rate of 100 samples/second, ensuring accuracy and real-time performance of temperature and analog measurements.

The RTD1 module uses 24V DC power supply, input circuits are equipped with electrical isolation, built-in surge suppression and protection circuits, effectively resisting electromagnetic interference and transient voltage surges in industrial fields. The module has comprehensive self-diagnostic functions, which can real-time monitor open and short circuit faults in sensor loops and report to the main control system, facilitating fault location and maintenance. Modular design supports hot-swap (depending on specific device), facilitating quick field replacement and system expansion.

This module has passed ABB Certification Level 1 certification, complies with IEC 60255, IEEE 1613, ANSI C37.90 and other relay protection and industrial automation related standards, and is widely used in temperature monitoring and process quantity acquisition in power systems, industrial automation, energy, petrochemical, metallurgy and other industries.

2. Specifications

表格

Parameter Value
Brand ABB (Switzerland)
Model RTD1
Order No. 1MRS050644A1 (also written as 1MRS050644)
Product Type RTD Analog Input Module (Signal analog input module)
Certification Level Certification Level 1
Compatible Systems ABB Relion Protection and Control Systems (REM 543/545, REM 610, etc.)
Number of Input Channels To be confirmed (common configurations 2/4/6 channels, individually configurable)
RTD Input Type Pt100 platinum RTD (100Ω), supports 2-wire/3-wire/4-wire connection
RTD Measuring Range 0°C ~ +400°C (3-wire, Pt100); some configurations support -50°C ~ +400°C
Current Input 4 - 20 mA DC
Voltage Input 0 - 10 V DC
Other Sensors Ni100, Cu100, etc. (programmable, to be confirmed)
Resolution 16-bit (including sign bit)
Measurement Accuracy ≤ ±0.1% Full Scale (FS)
Sampling Rate 100 samples/second
Common Mode Rejection Ratio High (specific value to be confirmed)
Input Impedance > 100 kΩ (voltage input)
Input Isolation Electrical isolation between channels and to system
Surge Protection Built-in surge suppression circuit
Self-Diagnostic Function Sensor open/short circuit detection, module fault self-diagnosis
Supply Voltage 24 V DC
Current Consumption To be confirmed (approx. 1A, reference value)
Power Consumption To be confirmed
Operating Temperature To be confirmed (reference range -25°C ~ +70°C or 0°C ~ +55°C, depending on certification level)
Storage Temperature -40°C ~ +85°C (reference value)
Humidity 5% ~ 95% RH (non-condensing)
Protection Degree IP20 (module level, installed in control cabinet)
Dimensions To be confirmed (reference size approx. 125×125×100 mm)
Weight To be confirmed (reference value approx. 0.5-1.5 kg)
Mounting Method DIN rail / terminal rack / device slot (depending on specific device)
Standards IEC 60255, IEEE 1613, ANSI C37.90 (complete list to be confirmed)
HS Code 85389091
Price Reference Approx. CA$5,452.20 (third-party supplier reference price, subject to formal quotation)
Country of Origin To be confirmed (ABB European factory)
Stock Status Order available

3. Key Features

  1. Multi-Type Input Support — Supports Pt100 platinum RTD temperature sensors (2-wire/3-wire/4-wire connection), 4-20mA current signals, and 0-10V voltage signals, flexibly adapting to common temperature sensors and analog transmitters in industrial fields, one module meets multiple signal acquisition needs.
  2. High-Precision Measurement — Uses 16-bit high-resolution A/D converter, measurement accuracy up to ±0.1% full scale, sampling rate 100 samples/second, ensuring accuracy, stability, and real-time performance of temperature and analog measurements, meeting high-precision requirements for relay protection and process monitoring.
  3. Relion System Original Factory Compatibility — Specifically designed for ABB Relion protection and control systems, perfectly compatible with REM 543/545, REM 610 and other protection devices, plug-and-play, no additional configuration and debugging required, ensuring system integration stability and reliability.
  4. Electrical Isolation and Anti-Interference — Input circuits have electrical isolation between channels and to system, built-in surge suppression and protection circuits, effectively resisting electromagnetic interference, common-mode voltage, and transient voltage surges in industrial fields, ensuring stable operation in harsh electromagnetic environments.
  5. Comprehensive Self-Diagnostic Function — The module has comprehensive self-diagnostic functions, which can real-time monitor open and short circuit faults in sensor loops, module hardware status, and communication status, and report fault information to the main control system, facilitating quick fault location and maintenance, improving system availability.
  6. Modular Easy-Maintenance Design — Adopts modular design, supports hot-swap (depending on specific device), facilitating quick field replacement and system expansion, reducing maintenance downtime. Compact module size, suitable for control cabinets and protection devices with limited installation space.
  7. Wide Temperature Range High Reliability — Industrial-grade component design, adapts to a wide operating temperature range (specific range to be confirmed), storage temperature -40°C ~ +85°C, humidity 5%-95% RH, ensuring long-term stable operation under various industrial environmental conditions.
  8. Multi-Standard Certification — Passed ABB Certification Level 1 certification, complies with IEC 60255, IEEE 1613, ANSI C37.90 and other relay protection and industrial automation related international standards, product quality and performance guaranteed, globally applicable.
  9. Temperature Monitoring Specific Optimization — Specifically optimized for RTD temperature measurement, supports 2-wire/3-wire/4-wire connection methods for Pt100 sensors, 3-wire connection can automatically compensate lead resistance error, ensuring accuracy of long-distance temperature measurement, especially suitable for temperature monitoring of transformers, motors, cables and other equipment.
  10. ABB Original Factory Quality — Designed and manufactured by ABB, a global leading power and automation technology company, relay protection and control products passed strict quality inspection and long-term industrial field validation, widely used in global power systems and industrial automation, with 12-month original factory warranty.

4. Typical Applications

  • Power System Relay Protection: Temperature monitoring and analog acquisition expansion for ABB Relion protection devices (REM 543/545, REM 610, etc.), used for temperature monitoring of transformers, busbars, lines and other protection devices
  • Transformer Temperature Monitoring: Winding and oil temperature monitoring of power transformers and distribution transformers, 配合 Pt100 temperature sensors to 实现 transformer overheating protection and alarm
  • Motor Temperature Protection: Winding and bearing temperature monitoring of large motors and generators, 实现 motor overheating protection and preventive maintenance
  • Cable Temperature Monitoring: Temperature monitoring of high-voltage cable joints and cable tunnels, preventing cable overheating faults
  • Industrial Process Temperature Control: Reactor, pipeline, storage tank temperature monitoring and process control in petrochemical, metallurgy, chemical, pharmaceutical and other industries
  • Analog Signal Acquisition: 4-20mA current signal and 0-10V voltage signal acquisition, connecting pressure, flow, level and other industrial transmitters
  • Energy Management Systems: Temperature and process quantity data acquisition for power plants, substations, industrial enterprise energy management systems
  • Switchgear Temperature Monitoring: Contact and busbar temperature monitoring in medium and high voltage switchgear, preventing overheating faults
  • Renewable Energy: Equipment temperature monitoring and process control for wind power, photovoltaic, energy storage and other new energy stations
  • Data Centers: Data center room temperature monitoring, UPS battery temperature monitoring, and cooling system control
  • Rail Transit: Equipment temperature monitoring for traction substations, subways, light rail and other rail transit power supply systems
  • Other industrial applications requiring high-precision temperature and analog acquisition

5. Model Explanation

Complete Order No.: 1MRS050644A1

Product Model: RTD1

Product Description: Signal analog input module, RTD1, Certification Level 1

Model code breakdown:

  • 1MRS050644: ABB module product code
  • A1: Revision / Configuration code

Compatible ABB Protection Devices (partial):

  • REM 543: Machine protection relay
  • REM 545: Machine protection relay
  • REM 610: Motor protection relay
  • Other ABB Relion protection and control devices supporting RTD1 expansion module

Input Type Configuration (individually configurable):

表格

Input Type Range Connection
Pt100 RTD 0°C ~ +400°C 2-wire/3-wire/4-wire
Current 4 - 20 mA DC 2-wire
Voltage 0 - 10 V DC 2-wire

HS Code: 85389091

Brand: ABB, global leading power and automation technology company

6. Installation & Usage Instructions

Installation Notes:

  • Before installation, confirm module model matches protection device requirements (RTD1 / 1MRS050644A1)
  • Module installation and wiring must be performed in de-energized state, ensure safety
  • Wear anti-static wrist strap to avoid electrostatic damage to module circuit
  • Insert module into correct slot per device instructions, ensure reliable connection
  • For 3-wire RTD sensor connection, ensure three leads have same specification and length to compensate lead resistance
  • Pay attention to polarity for 4-20mA and 0-10V signal wiring, avoid reverse connection
  • After wiring completion, check all connections, confirm correct before power-on

Configuration & Commissioning:

  • Set input type (RTD/current/voltage) for each channel via protection device HMI or configuration software
  • For RTD input, set sensor type (Pt100), connection method (2-wire/3-wire/4-wire), and range
  • Configure temperature alarm and protection thresholds (such as high temperature alarm, overheating trip)
  • Perform channel calibration and zero adjustment (if needed)
  • Verify sensor readings match actual temperature/signals
  • Test sensor open/short circuit alarm function

Maintenance Recommendations:

  • Regularly inspect module operating status, check for alarms and fault records via protection device
  • Regularly check wiring terminals for looseness, ensure good contact
  • Regularly calibrate temperature measurement channels (recommended annually, depending on application requirements)
  • Recommended to stock 1-2 modules as critical spare parts for quick replacement in case of failure
  • For module fault codes and diagnostic information, refer to the corresponding protection device technical manual
  • After module replacement, reconfigure channel parameters and verify functions

Safety Notes:

  • Module operates at 24V DC safety voltage, but connected sensors and transmitters may be in industrial field environment, pay attention to safety during maintenance
  • Wait for module to fully discharge after power-off before plugging/unplugging
  • Avoid subjecting module to severe vibration and mechanical shock
  • Discarded electronic modules should be disposed of per e-waste regulations

7. Why Choose Us

  1. Factory Order, Quality Guaranteed — All products sourced directly from ABB factory or authorized channels, ensuring genuine originals with factory packaging, certificates, and quality documents, with 12-month original factory warranty. Standard lead time 4-8 weeks, rush orders can be coordinated for expedited delivery.
  2. Worldwide Delivery — Supports DHL, FedEx, UPS and other international couriers. Can also ship via your designated freight forwarder to 200+ countries.
  3. Professional Technical Support — Selection consultation (confirming compatible protection device model, input type configuration), compatibility confirmation, technical parameter answers, and alternative model recommendation services to help you quickly identify the correct module model and configuration.
  4. Flexible Procurement — Supports small-batch sample orders and large-volume project orders with tiered pricing discounts. Project-specific quotations and spare parts framework agreements available.
  5. Pre-shipment Inspection — Appearance check, packaging verification, model confirmation, and power-on test performed before shipment to ensure delivered products are intact, model-accurate, and functional.

8. Frequently Asked Questions (FAQ)

Q1: Which ABB protection devices is this RTD1 module compatible with? Can my device use it?

A: The RTD1 (1MRS050644A1) is an expansion analog input module for ABB Relion protection and control systems, mainly compatible with REM 543, REM 545, REM 610 and other ABB machine protection and motor protection relays, as well as other ABB protection and control devices supporting RTD1 expansion modules. Whether your device can use it requires confirmation:

  1. Whether the device model is in the support list
  2. Whether the device has an available expansion module slot
  3. Whether the device firmware version supports RTD1 module It is recommended that you provide the complete model and firmware version of the protection device, and we can assist in confirming compatibility. If your device does not support RTD1, we can also recommend other suitable temperature monitoring solutions.

Q2: How many input channels does this module have? How many Pt100 sensors can it connect simultaneously?

A: The number of input channels of the RTD1 module has different statements in different materials (2/4/6 channels), the specific number of channels is to be confirmed by the manufacturer, it is recommended to refer to ABB official data sheet or device manual. Different configurations and versions of RTD1 modules may have different channel counts. Each channel can be independently configured as RTD (Pt100), 4-20mA current, or 0-10V voltage input, so it can simultaneously connect multiple Pt100 temperature sensors or analog transmitters, the specific number depends on the module's channel count. If you need a specific number of temperature input channels, please specify when inquiring, and we can confirm and recommend the appropriate module or configuration solution.

Q3: Can Pt100 sensors use 2-wire connection? What is the difference between 3-wire and 4-wire?

A: Yes. The RTD1 module supports 2-wire, 3-wire, and 4-wire connection methods for Pt100 sensors (configurable). Differences between the three connection methods:

  • 2-wire: Simplest, only requires 2 wires, but lead resistance is included in sensor resistance, causing measurement error, suitable for very short leads (<1m) and low accuracy requirements
  • 3-wire: Most commonly used, uses 3 wires, module can automatically compensate lead resistance error, higher measurement accuracy, suitable for most industrial applications (recommended)
  • 4-wire: Highest accuracy, uses 4 wires, completely eliminates lead resistance influence, suitable for high-precision measurement and long-distance leads For temperature monitoring of transformers, motors and other equipment, 3-wire connection is recommended, balancing accuracy and economy. When wiring, ensure three leads have same specification and length.

Q4: What is the measurement accuracy of this module? Can it be used for protection tripping?

A: According to documentation, the RTD1 module has a measurement accuracy of ≤ ±0.1% Full Scale (FS), 16-bit resolution, and a sampling rate of 100 samples/second. For Pt100 temperature measurement (0-400°C range), ±0.1% FS corresponds to ±0.4°C accuracy, which is a relatively high accuracy level in industrial temperature monitoring.

This module is designed for ABB relay protection devices, can be used for temperature protection tripping, such as transformer overheating trip, motor overheating trip, etc. However, whether it can be used as the sole basis for protection tripping depends on your protection configuration and safety requirements. For temperature protection of critical equipment, it is recommended:

  1. Use an independent temperature protection relay as main protection
  2. RTD1 module as monitoring and backup protection
  3. Adopt redundant configuration for critical protection Specific protection schemes should be designed according to relevant standards and field safety requirements.

Q5: What causes the module to report "sensor open/short circuit" fault? How to handle it?

A: The RTD1 module has sensor loop self-diagnostic function, when it detects open or short circuit in the sensor loop, it will report a fault. Common causes and handling methods:

Sensor Open (circuit broken):

  • Sensor lead broken or wiring terminal loose → Check wiring, retighten
  • Sensor internal damage (Pt100 resistance wire broken) → Replace sensor
  • Wiring error (e.g., missing one wire in 3-wire) → Wire correctly per instructions

Sensor Short (circuit shorted):

  • Sensor lead insulation damaged causing short between wires → Check cable, replace damaged cable
  • Sensor internal short circuit → Replace sensor
  • Wiring error causing short circuit → Check and correct wiring

Handling Steps:

  1. Check protection device fault records, confirm which channel and what type of fault
  2. On-site inspect sensor wiring and cables
  3. Measure sensor resistance with multimeter (Pt100 is 100Ω at 0°C, approx. 110Ω at room temperature), determine if sensor is normal
  4. After troubleshooting, reset fault alarm in protection device
  5. If sensor and wiring are normal but fault still reported, module channel may be damaged, consider replacing module

Q6: Is this module in stock? What is the lead time? What is the approximate price?

A: This model is currently in order available status, standard lead time 4-8 weeks (ordered from ABB factory). RTD1 modules are dedicated industrial spare parts, with limited stock inventory, usually requiring production to order or allocation from global inventory. Regarding price, third-party supplier reference price is approximately CA$5,452.20 (approx. USD 4,000, for reference only), specific price is subject to our formal quotation, bulk procurement can enjoy tiered discounts. If you have urgent needs (such as equipment failure downtime), we can try to coordinate global stock inventory or expedited ordering. Please indicate required quantity and desired delivery time when inquiring, and we will do our best to coordinate the fastest delivery solution and optimal price.

Q7: Can you provide technical support and configuration guidance?

A: Yes. We provide the following technical support services:

  1. Selection Confirmation: Confirm RTD1 module compatibility and input configuration based on your protection device model and requirements
  2. Wiring Guidance: Provide Pt100 sensor 2-wire/3-wire/4-wire wiring instructions and precautions
  3. Configuration Guidance: Guide how to configure channel input types, ranges, and protection thresholds in the protection device
  4. Fault Diagnosis: Analyze fault codes via phone or remote assistance, determine sensor, wiring, or module faults
  5. Calibration Guidance: Provide methods and procedures for temperature channel calibration and zero adjustment
  6. Alternative Solutions: If the original model is discontinued or out of stock, provide alternative model or other temperature monitoring solution recommendations

For technical questions, please feel free to contact our sales and technical support team.

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