Allen Bradley 1203-CN1 ControlNet Communication Module

Allen Bradley 1203-CN1 ControlNet Communication Module is a communication interface that connects Allen-Bradley drives with a SCANport port to a ControlNet network, allowing drive control, status monitoring, and configuration from a ControlLogix, PLC-5, or other ControlNet master. Powered by a 24V DC supply at up to 250 mA, the module mounts directly to the drive’s SCANport connection and provides a single ControlNet node for the connected drive, commonly used with 1336 and PowerFlex series drives in industrial automation systems.

Product Datasheet

• Brand: Allen-Bradley
• Model: 1203-CN1
• Product Name: ControlNet Communication Module
• Function: ControlNet-to-SCANport interface for Allen-Bradley drives
• Power Supply: 24V DC, 250 mA max
• Mounting: SCANport connection on compatible drives
• Compatible With: Allen-Bradley drives with SCANport interface, such as 1336 and PowerFlex series

Fault Troubleshooting and Common Questions

1. The module does not communicate on the ControlNet network. Check the module’s connection to the drive, the 24V DC supply, ControlNet cabling, terminators, and the network address setting. Confirm the module is recognized by the ControlNet master and that the firmware revision is supported by the drive and network configuration.
2. The drive cannot be controlled from the network. Verify the drive’s SCANport connection, the module’s network node address, and the drive configuration for network control. Confirm that the control source and speed reference are set to the communication module in the drive parameters.
3. Communication is intermittent or the module reports node faults. Inspect ControlNet trunk cable, taps, and terminators for loose connections or damage. Check for network interference, address conflicts, and verify that the 24V DC supply is stable within specification.
4. Can the 1203-CN1 replace another communication module? Not without verification. Compare the full part number, network type, connector layout, power requirements, firmware revision, and compatibility with the specific drive model and network configuration.

Safety Precautions

• Isolate power and follow lockout/tagout procedures before removing or installing the module.
• Use electrostatic discharge protection when handling electronic assemblies.
• Verify the 24V DC supply and network wiring before energizing the system.
• Confirm ControlNet termination and node addressing before commissioning.
• Use qualified personnel for troubleshooting and commissioning in operating drive systems.

Frequently Asked Questions

Q1: What is the Allen Bradley 1203-CN1? The 1203-CN1 is a ControlNet communication module that lets Allen-Bradley drives with SCANport connect to a ControlNet network for control, monitoring, and configuration.

Q2: Which drives does the 1203-CN1 work with? It works with Allen-Bradley drives that provide a SCANport connection, including 1336 and PowerFlex series drives.

Q3: What power supply does the 1203-CN1 need? The module operates from a 24V DC supply with a maximum current draw of 250 mA.

Q4:What should be checked before purchase? Verify the model label, full part number, firmware revision, condition, connector configuration, and compatibility with the specific drive model and ControlNet network.