ABB 500SCM01 1MRB200059/C Communication Module

I. Positioning and Applications

• Series Affiliation: Communication Module of ABB AC 500 series PLC, used to expand the system's network communication capabilities and enable data interaction between the PLC and external devices, host computers, or other control systems.
• Core Functions:

• Supports multiple industrial communication protocols, adapting to different automation network architectures.

• Serves as a communication hub for the AC 500 system with sensors, actuators, human-machine interfaces (HMIs), or remote monitoring systems.

• Suitable for scenarios requiring cross-network data transmission, such as intelligent manufacturing, process control, and building automation.

II. Technical Parameters and Characteristics

Communication Interfaces and Protocols

• Interface Types:

• 2 RJ45 Ethernet interfaces (supporting 10/100 Mbps auto-negotiation), compatible with ring network topologies (e.g., FastTrack redundant network).

• 1 RS-485 serial interface (supporting protocols like Modbus RTU and ASCII).

• Supported Protocols:

• Ethernet: EtherNet/IP, Modbus TCP, ABB Ability™ communication protocol, SNTP (network time synchronization).

• Serial: Modbus RTU Master/Slave, free port communication (user-defined protocols).

Electrical Characteristics

• Operating voltage: 24 VDC (powered by the rack power supply module).

• Power consumption: Typical value ≤5 W.

• Isolation protection: Electrical isolation between Ethernet interfaces and internal circuits (isolation voltage 1500 VAC) for electromagnetic interference resistance.

Data Transmission Capability

• Maximum Ethernet throughput: Approximately 80 Mbps (depending on protocol load).

• Serial interface baud rate: Adjustable from 1200 to 115200 bps.

III. Functional Highlights and Technical Features

Network Redundancy and Reliability

• Ring Network Support: FastTrack redundant ring networks can be formed via Ethernet interfaces, with self-healing time<50 ms during faults to ensure communication continuity.

• Disconnection Detection and Recovery: Supports real-time network status monitoring, automatically triggering alarms and attempting reconnection when disconnections occur.

Protocol Conversion and Multi-Network Interconnection

• Can act as a protocol gateway to enable data conversion between EtherNet/IP and Modbus RTU networks (e.g., connecting third-party Modbus devices to Ethernet).

• Supports concurrent operation of multiple protocols (e.g., handling EtherNet/IP communication and Modbus RTU slave requests simultaneously).

Configuration and Monitoring

• Visually configure communication parameters and protocol mapping tables via Control Builder AC 500 software.

• Panel LED indicators (Link, Activity, Error) display network status in real time, supporting fault early warning.

IV. Typical Application Scenarios

V. Interfaces and Wiring ExamplesHardware Interface Layout

• Ethernet interfaces: 2 RJ45 ports (labeled "NET1" and "NET2"), supporting direct connection or networking via switches.

• RS-485 interface: 3-pin terminal block (+, -, GND), supporting shielded cable connections to reduce interference.

• Status indicators:

• Link (green): Illuminates when Ethernet link is connected.

• Activity (orange): Flashes during data transmission.

• Error (red): Illuminates in case of communication faults or configuration errors.

Ring Network Wiring Example

Connect the NET1 and NET2 interfaces of two 500SCM01 modules end-to-end to form a ring network, expand nodes via switches in between, and the system automatically configures redundant paths.

VI. Comparison with Similar Modules (500SCM02, 500SCM12)

VII. Configuration and Debugging Essentials

Installation and Network Setup

• Insert into the communication slot of the AC 500 rack, powered via the backplane bus.

• Ethernet interfaces require IP address configuration (static or DHCP); enable the "FastTrack" function in software for ring network mode.

Protocol Configuration Example (Modbus TCP Master)

• Create a Modbus TCP master task in Control Builder, specifying slave IP, port (default 502), and data mapping tables (e.g., reading holding register addresses 40001–40010).

• Polling cycles (e.g., 100 ms) or event-triggered communication can be set.

Fault Troubleshooting

• If the Error light is on: Check network cable connections, IP address conflicts, or protocol parameter configuration errors.

• For serial communication anomalies: Confirm that baud rate, data bits, and parity bits match the slave device, and inspect for loose wiring or poor grounding.

VIII. Conclusion

• Strong compatibility: Simultaneously supports Ethernet and serial protocols, adapting to mixed networking of new and old devices.

• High reliability: Ring network redundancy and electrical isolation designs meet anti-interference requirements in industrial fields.

• Flexible configuration: Visual management of communication tasks via software reduces integration difficulty, suitable for data interaction scenarios in medium-to-large automation systems.