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CJ1W-PRM21

Omron CJ1W-PRM21 CJ Series Protocol Macro Communication Unit

SKU: CJ1W-PRM21

USD 486.00

Omron CJ1W-PRM21 is a protocol macro communication unit for CJ series PLCs, enabling custom serial protocol communication.

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Product Overview

The Omron CJ1W-PRM21 is a specialized communication module for CJ1 series PLCs, featuring Protocol Macro functionality for custom serial protocol communication. This module allows users to create custom communication protocols for interfacing with non-standard devices that use proprietary or uncommon serial communication formats. The Protocol Macro functionality enables development of custom message formats, timing sequences, and response handling without requiring external protocol converters. The CJ1W-PRM21 supports both RS-232C and RS-485 interfaces, providing flexibility for various connection types. The module can send and receive variable-length messages with custom headers, checksums, and data formats. Easy programming is achieved through CX-Protocol software, which provides a visual interface for creating and testing protocol sequences. The CJ1W-PRM21 is ideal for connecting to legacy equipment, specialized sensors, barcode systems, and any device requiring custom communication protocols. The module includes buffer memory for handling data exchange without impacting PLC scan time. LED status indicators provide monitoring of communication activity. Applications include custom device integration, legacy equipment modernization, specialized sensor interfaces, and any application requiring non-standard serial communication.

  • SKU: CJ1W-PRM21
  • Series: CJ1W

Best-Fit Applications

  • Custom device integration
  • Legacy equipment connection
  • Specialized sensor interfaces
  • Barcode scanner integration
  • Weigh scale communication
  • Non-standard protocol devices
  • Custom serial devices
  • Protocol conversion

Buying Checklist

  • Custom protocol flexibility
  • No external converters needed
  • RS-232 and RS-485 support
  • CX-Protocol easy programming
  • LED diagnostics
  • Standard CJ1 compatibility
  • Proven Omron technology
  • Simplifies device integration

Technical Specifications

Model CJ1W-PRM21
Series CJ1W
Type Protocol Macro Communication Unit
Ports 1x RS-232C/RS-422/RS-485
Protocol User-defined (Protocol Macro)
Baud Rate 300 bps to 115.2 kbps
Max Stations 32 stations (multi-drop)
Max Distance 500m (RS-485)
Current Consumption 200mA at 5VDC
Compatible CPUs CJ1M, CJ1G, CJ1H, CJ2M, CJ2H
Operating Temperature 0 to +55°C
Mounting CJ series backplane

FAQ for CJ1W-PRM21

What's Protocol Macro?
User-defined serial protocol. Define message format, timing, response handling. Enables communication with devices using custom or non-standard protocols.
How do I configure Protocol Macro?
Protocol Macro Support Tool software: define message format, timing charts, response handling. Download protocol to unit. PLC program uses PMCR instruction to execute protocol.
What devices can I communicate with?
Any device with serial interface: barcode readers, scales, instruments, custom equipment. As long as you can define the protocol, you can communicate.
Can I use this for Modbus communication?
Yes, but CJ1W-SCU series with Modbus macro is easier. Protocol Macro allows custom Modbus implementation or non-standard Modbus variants.

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