FHF Z51-ZM20-2 Intrinsically Safe Central Control Module | Ex ib I Mb Mining | X86 Architecture | Profibus DP Master | Germany FHF | In Stock

Original FHF (Germany) Z51-ZM20-2 intrinsically safe central control module (CPU), explosion protection class 1 M2 Ex ib I Mb (mining intrinsically safe), X86 architecture processor, IEC 1131 programming standard, with Soft-PLC function. Equipped with Ethernet (RJ45, 10MBit/s), Profibus DP master, RS485/RS422/RS232 serial interfaces, and plastic fiber optic interface. Central intelligent control unit for ZM51 automation stations, suitable for mining, chemical and other hazardous environments. Av

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Product Details

1. Product Overview

The FHF Z51-ZM20-2 is an intrinsically safe central control module (Zentralmodul / CPU) from FHF Funke+Huster Fernsig GmbH & Co. KG (Germany), part of the FHF Z51 series of industrial control products. It serves as the central intelligent control unit of the ZM51 automation station, used to build ZM51 stations with multiple processing units.

This central module has an explosion protection class of 1 M2 Ex ib I Mb (mining intrinsically safe type), enabling safe use in explosive hazardous environments such as underground coal mines. The module combines an I/O processor with a microcontroller, based on IBM-compatible PC (X86) architecture, conforming to the IEC 1131 programming standard, with Soft-PLC (Soft-SPS) functionality. It can implement closed-loop control, motor sequence control, interlock control, data acquisition, storage, and alarm functions.

The Z51-ZM20-2 is equipped with comprehensive communication interfaces: Ethernet (RJ45, TCP/IP, 10 MBit/s), built-in Profibus DP master interface, three serial interfaces (COM1: RS485, COM2: RS422, COM3: RS232), and a plastic fiber optic interface, enabling flexible connection to various field devices and remote I/O modules. The module is available in two versions: Master (article number FHF 150 80 80 31 AX) and Slave (article number FHF 150 80 80 80 AX), to accommodate different system architecture requirements.

2. Specifications (per Official Manual)

表格

Parameter	Value
Brand	FHF Funke+Huster Fernsig GmbH & Co. KG
Model	Z51-ZM20-2
Product Type	Intrinsically Safe Central Control Module (Zentralmodul / CPU)
Series	FHF Z51 Series / ZM51 Automation Station
Explosion Protection	1 M2 Ex ib I Mb (mining intrinsically safe)
Processor Architecture	I/O processor + microcontroller, IBM-compatible PC (X86) architecture
Programming Standard	IEC 1131
Control Function	Soft-PLC (Soft-SPS) function
Ethernet Interface	RJ45, TCP/IP, 10 MBit/s
Profibus Interface	Built-in Profibus DP master interface
Serial Interface COM1	RS485 (serial feeder bus, master-slave data transmission)
Serial Interface COM2	RS422 (local LCD display ZS1-AB21)
Serial Interface COM3	RS232
Fiber Optic Interface	Plastic fiber optic (for connecting L1.20 copy station Typ L1.2110)
Local Display	Supports local LCD display (ZS1-AB21)
Versions	Master (FHF 150 80 80 31 AX) / Slave (FHF 150 80 80 80 AX)
Processor Model	To be confirmed by manufacturer
Clock Frequency	To be confirmed by manufacturer
RAM	To be confirmed by manufacturer
Storage (Flash/SSD)	To be confirmed by manufacturer
Input Voltage	To be confirmed by manufacturer
Power Consumption	To be confirmed by manufacturer
Operating Temperature	To be confirmed by manufacturer
Storage Temperature	To be confirmed by manufacturer
Protection Degree	To be confirmed by manufacturer
Dimensions	To be confirmed by manufacturer
Weight	To be confirmed by manufacturer
Country of Origin	Germany
Stock Status	In stock
Manual Revision	Betriebsanleitung Z51-ZM20-2, Stand 09/96 (September 1996)

3. Key Features

Mining Intrinsically Safe Design (Ex ib I Mb) — Explosion protection class 1 M2 Ex ib I Mb, intrinsic safety design for safe use in underground coal mines and other explosive gas environments, meeting the most stringent industrial safety requirements.
X86 Industrial PC Architecture + Soft-PLC — Combines an I/O processor with a microcontroller, based on IBM-compatible PC (X86) architecture, conforming to IEC 1131 programming standard, with Soft-PLC (Soft-SPS) functionality, capable of running standard industrial control programs and implementing complex control logic.
ZM51 Automation Station Central Control Unit — Serves as the central intelligent control unit of the ZM51 automation station, responsible for process data acquisition, storage, processing, and output, enabling the construction of distributed automation systems with multiple processing units.
Comprehensive Communication Interfaces — Equipped with Ethernet (RJ45, 10MBit/s), Profibus DP master, three serial interfaces (RS485/RS422/RS232), and plastic fiber optic interface, enabling flexible connection to field devices, remote I/O, HMI displays, and host computer systems.
Master/Slave Dual Versions — Available in Master (article number FHF 150 80 80 31 AX) and Slave (article number FHF 150 80 80 80 AX) versions, accommodating different system architectures and redundancy configuration requirements.
Real-Time Process Data Processing — Acquires process data in real-time through the station's input modules and stores it, outputs control signals to field devices through output modules, prepares data for serial transmission, achieving real-time control and data exchange.
Local LCD Display Support — Connects to a local LCD display (ZS1-AB21) via the COM2 (RS422) interface, enabling on-site parameter display, status monitoring, and operation settings.
German Original Quality — Designed and manufactured by FHF Funke+Huster Fernsig GmbH & Co. KG (Germany), a professional manufacturer of industrial communication and explosion-proof equipment. Products comply with German and international industrial safety standards. Manual revision September 1996, validated through long-term industrial field operation.

4. Typical Applications

Coal Mine Safety Monitoring and Control Systems: Acquisition, monitoring, alarm, and ventilation control of environmental parameters such as gas, wind speed, temperature, and negative pressure in underground coal mines
Coal Mine Automation Control Systems: Automated control and interlock protection of underground belt conveying, drainage, power supply, hoisting, and other systems
Chemical Process Control: Process parameter acquisition, interlock control, and safety monitoring in hazardous areas of chemical plants
Oil & Gas Industry: Safety monitoring and control in hazardous areas such as drilling platforms, refineries, and oil/gas pipelines
ZM51 Automation Stations: As the central CPU module of ZM51 automation stations, building multi-processing-unit distributed control systems
Profibus DP Master Systems: As a Profibus DP master, connecting multiple DP slave devices for distributed I/O control
Intrinsically Safe Distributed Control Systems: Combined with intrinsically safe remote I/O modules and intrinsically safe sensors, forming complete intrinsically safe DCS/PLC systems
Legacy System Retrofit and Spare Parts Replacement: Central module fault replacement and system upgrade for existing FHF Z51/ZM51 systems

5. Model Explanation

Model Z51-ZM20-2:

Z51: FHF Z51 series industrial control product series code
ZM20: Zentralmodul (Central Module) model, ZM indicates central/main module, 20 is the product number
-2: Revision/configuration code

Two Versions and Article Numbers:

表格

Version	Article Number (Artikel-Nr.)
Master	FHF 150 80 80 31 AX
Slave	FHF 150 80 80 80 AX

Brand FHF Full Name:

FHF Funke+Huster Fernsig GmbH & Co. KG: German professional manufacturer of industrial communication and explosion-proof equipment, headquartered in Germany, with products widely used in hazardous areas such as mining, chemical, and oil & gas industries.

6. Why Choose Us

In Stock, Fast Shipping — This model is in stock, no long waiting required. Ships within 1-3 business days after order confirmation. All products sourced directly from FHF Germany factory or authorized channels, ensuring genuine originals with factory packaging and quality certificates.
Worldwide Delivery — Supports DHL, FedEx, UPS and other international couriers. Can also ship via your designated freight forwarder to 200+ countries.
Professional Technical Support — Selection consultation (Master/Slave version confirmation), compatible module confirmation, technical parameter answers, and alternative model recommendation services to help you quickly identify the correct central module model and system configuration.
Flexible Procurement — Supports small-batch sample orders and large-volume project orders with tiered pricing discounts. Project-specific quotations available.
Pre-shipment Inspection — Appearance check, packaging verification, and model confirmation performed before shipment to ensure delivered products are intact and model-accurate.

7. Frequently Asked Questions (FAQ)

Q1: What is the explosion protection class of Z51-ZM20-2? Can it be used in underground coal mines?

A: According to the official manual, the explosion protection class of Z51-ZM20-2 is 1 M2 Ex ib I Mb, which is a mining intrinsically safe type (intrinsic safety). It is designed for use in explosive gas environments such as underground coal mines. "Ex ib I Mb" means: Ex (explosion-proof), ib (intrinsic safety ib level), I (coal mine methane gas environment), Mb (equipment protection level M2, usable in underground coal mine Zone 1). It can be safely used in underground coal mines.

Q2: What is the difference between Master and Slave versions? How to choose?

A: According to the official manual, Z51-ZM20-2 is available in two versions:

Master: Article number FHF 150 80 80 31 AX, serves as the system main controller, responsible for control and communication management of the entire ZM51 station
Slave: Article number FHF 150 80 80 80 AX, serves as a slave module, controlled by the master, used to expand processing units When selecting, please confirm the version used in the original equipment, or choose based on system architecture requirements. It is recommended to use the same version as the original equipment for replacement. If you can provide a photo of the original equipment label, we can assist with verification.

Q3: What communication interfaces does this central module have?

A: According to the official manual, Z51-ZM20-2 is equipped with the following communication interfaces:

Ethernet: RJ45 connector, TCP/IP protocol, 10 MBit/s
Profibus DP: Built-in DP master interface, can connect multiple DP slaves
COM1 (RS485): Serial feeder bus, supports master-slave data transmission
COM2 (RS422): For connecting local LCD display (ZS1-AB21)
COM3 (RS232): General-purpose serial interface
Plastic Fiber Optic Interface: For connecting L1.20 copy station (Typ L1.2110)

Q4: What programming standard does this module support? Can it be used as a PLC?

A: According to the official manual, Z51-ZM20-2 conforms to the IEC 1131 programming standard (predecessor of IEC 61131-3 programmable controller programming language standard) and has Soft-PLC (Soft-SPS) functionality. It can be used as an industrial controller, implementing closed-loop control, motor sequence control, interlock control, data acquisition, storage, and alarm functions. It acquires process data through the station's input modules, outputs control signals through output modules, and communicates via the local control network.

Q5: What are the specific configurations such as processor and memory?

A: The official manual confirms that this module combines an I/O processor with a microcontroller, based on IBM-compatible PC (X86) architecture. However, specific parameters such as processor model, clock frequency, memory capacity, and storage capacity are not detailed on page 1 of the manual — to be confirmed by the manufacturer. Since this product is a dedicated industrial control module from the 1996 era, some technical parameters may require consulting the complete manual (12 pages total) or querying the manufacturer. We can assist in querying the manufacturer or consulting the complete manual for more information.

Q6: Can you provide the complete operation manual?

A: The image you provided is page 1 of the official operation manual (Betriebsanleitung Z51-ZM20-2, Stand 09/96, 12 pages total). We can attempt to contact our sales team to obtain the complete 12-page operation manual and technical documentation. Since this product is a mining intrinsically safe dedicated industrial control module, some technical documentation may require project information before release. We can also verify key parameters based on the physical product label.

Q7: How fast can in-stock items ship?

A: This model is in stock. After order confirmation and payment receipt, it typically ships within 1-3 business days. Specific shipping time depends on order quantity and current stock status. Contact sales before ordering to confirm real-time stock. We will coordinate the fastest shipping option available.

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