Part Number - CJ1W-PRM21

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Product Details

  • CJ1 Communication Control Module (CJ1WPRM21)
  • Manufacturer: Omron
  • Series: CJ1

Product Description

The Omron CJ1W-PRM21 (CJ1WPRM21) is a PROFIBUS-DP master unit from the CJ1 series. This unit is a special CPU unit that can manage the PROFIBUS network. The master unit has to use the dedicated configuration program CX-PROFIBUS. If the CJ1W-PRM21 fails to participate in this specific configuration, it will be impossible for the unit to make any data exchange. Besides this, the Omron master unit will operate under certain Microsoft Windows programs such as NT 4.0, 2000, or XP.

The CJ1W-PRM21 is permitted to connect with 16 PROFIBUS network applicable PLCs in an Omron configuration that is likewise configurable to a PROFIBUS network. The master unit has a port that connects to an RS-485 cable which is galvanically isolated from the PLC. The CJ1W-PRM21 does not directly append to a personal computer, by being a member of the Omron configuration, the CPU unit can connect to the computer using an EIA RS-232C cable and attach it to the peripheral port or RS-232C port. Then the CX-configurator CD program may be inserted in the personal computer, creating the PROFIBUS network. The Omron configuration, which the master unit is a part of, may be mounted on either a CPU rack or a CJ1 expansion.

The CJ1W-PRM21 has a current consumption of 400mA when the voltage is at 5VDC. The dimensions of the master unit are 31mm by 90mm by 65mm (1.22in by 3.54in by 2.56in). The configurator may also choose one of the twelve selected baud rates that range between 9.6 kBit/s to 12 Mbit/s.

Technical Specifications

Module Type: PROFIBUS-DP Master Unit CJ1W-PRM21
Current Consumption: 400mA at 5VDC
Weight: 0.22kg (0.1kg)

Shipping and Order Information

  • TRW Supply can usually ship in stock items same day before 3:30 PM EST for no extra cost and before 5 PM with a rush fee
  • Omron CJ1 Shipping options vary by location. Call for an accurate quote.


  • The Omron CJ1W-PRM21 comes with a one-year warranty.

Additional Information

TRW Electric & Supply Company is a global automation supplier. We deliver reliable new and refurbished parts at a great value. Our product focus is Omron and Mitsubishi products, but we have been able to provide our customers with solutions from other manufacturers as well. Our goal is to supply the automation industry with the best service and pricing, and of course conduct business with a high level of integrity.

Authorized Distributors

A Omron Authorized Distributor for CJ1 is not the only source for Omron products. Many of the Omron products have been discontinued and therefore are no longer available from authorized suppliers. Omron Authorized Supplier of Omron Automation. TRW Electric & Supply has many new and refurbished Omron CJ1 parts available for purchase.

More Information: CJ1W-PRM21, CJ1WPRM21, CJ1W PRM21, CJ1W-PRM 21

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