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ABB CM597-ETH

The ABB CM597-ETH (1SAP173700R0001) is an Ethernet communication module designed for ABB AC500 programmable logic controller (PLC) systems.

It provides Ethernet TCP/IP connectivity through two integrated RJ45 interfaces with an internal two-port Ethernet switch. The module supports TCP/IP, UDP/IP and Modbus TCP protocols, enabling communication between AC500 controllers, industrial computers, SCADA systems, PLCs and other network-connected automation devices.

The CM597-ETH is designed to extend Ethernet communication capabilities across compatible ABB AC500 CPU platforms. It is suitable for industrial applications requiring data exchange, remote monitoring and integration with higher-level automation systems.

Core Functions

• Ethernet TCP/IP Communication: Provides Ethernet connectivity for industrial automation networks.

• Modbus TCP Support: Enables data exchange with compatible PLCs, HMIs, SCADA systems and industrial devices.

• UDP/IP Communication: Supports UDP-based communication with external controllers and automation equipment.

• Integrated Two-Port Switch: Connects two Ethernet network segments or devices through the built-in switching function.

• AC500 System Integration: Extends Ethernet communication functions across compatible AC500 PLC platforms.

• Remote Data Exchange: Supports communication between local controllers and external monitoring or supervisory systems.

• Network Diagnostics: Provides LED indicators for monitoring power, operating status and Ethernet communication activity.

Technical Parameters

Product Features

1. Multiple Ethernet Protocols

Supports TCP/IP, UDP/IP, Modbus TCP, ICMP, DNS and SMTP, providing flexible communication options for industrial automation networks.

2. Integrated Two-Port Ethernet Switch

Features two RJ45 Ethernet interfaces with an internal switch, simplifying network connections and reducing the need for additional switching hardware in suitable configurations.

3. High-Speed Data Transmission

Supports 10/100 Mbit/s Ethernet communication with adjustable transmission speed and duplex mode.

4. Modbus TCP Integration

Enables communication with compatible PLCs, industrial controllers, SCADA platforms and HMI equipment.

5. External Memory Capacity

Incorporates 8 MB of external RAM and 8 MB of external Flash memory for communication processing and configuration storage.

6. Flexible Station Identification

Provides rotary switches for station identification, with configurable values from 0 to 255.

7. Comprehensive Status Monitoring

Five status LEDs and Ethernet link/activity indicators provide information about power, readiness, operating state and network communication.

8. Extended-Condition Version

The CM597-ETH-XC variant is available for applications requiring extended environmental resistance.

Hardware Composition

The ABB CM597-ETH mainly consists of the following functional components:

• Ethernet Communication Processor: Handles TCP/IP, UDP/IP and Modbus TCP communication.

• Two-Port Ethernet Switch: Connects the two RJ45 interfaces through an integrated switching circuit.

• RJ45 Communication Interfaces: Provide physical connections to industrial Ethernet networks.

• Memory Unit: Includes external RAM and Flash memory for communication processing and data storage.

• CPU Communication Interface: Uses a 16 KB dual-port memory interface to exchange data with the AC500 controller.

• Power Supply Circuit: Receives 24 V DC through the CPU terminal base.

• Status Indicator Unit: Provides LED indications for operating conditions and Ethernet activity.

• Rotary Switches: Support station identification and communication configuration.

Typical Applications

• ABB AC500 PLC automation systems

• Industrial Ethernet communication networks

• Modbus TCP control systems

• SCADA and HMI integration

• Distributed industrial automation

• Manufacturing and production lines

• Water and wastewater treatment

• Oil and gas processing

• Chemical and petrochemical plants

• Industrial equipment monitoring

• Remote PLC communication

Maintenance Considerations

• Verify the complete model and order number before replacement.

• Check the 24 V DC supply through the CPU terminal base.

• Inspect both RJ45 connectors and Ethernet cables.

• Confirm the correct IP address and network configuration.

• Verify Modbus TCP communication settings.

• Check transmission speed and duplex configuration.

• Monitor PWR, RDY, RUN, STA and ERR indicators.

• Confirm compatibility with the AC500 CPU and TB5xx terminal base.

• Back up the PLC project and communication configuration before replacing the module.

• Maintain suitable temperature and humidity conditions.

Product Lifecycle Note: ABB's November 2025 datasheet identifies CM597-ETH 1SAP173700R0001 as being in the Classic lifecycle phase. ABB indicates that Classic products may remain available from stock but are not recommended for planning and commissioning new installations.

Overall Evaluation

The ABB CM597-ETH 1SAP173700R0001 is a dedicated Ethernet communication module for ABB AC500 PLC systems. Its integrated two-port Ethernet switch, support for TCP/IP, UDP/IP and Modbus TCP, and compatibility with multiple AC500 CPU families make it a practical solution for industrial network integration.