Omron CJ1W-PRM21 CJ1 Series PROFIBUS Master Unit

SKU CJ1W-PRM21

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12-month warranty
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Manufacturer: Omron
Product No.: CJ1W-PRM21
Country of origin:Japan
Product Type: PROFIBUS Master Units
Payment: T/T, Western Union
Weight: 100g
Dimensions: 3.1 x 9.0 x 6.5 cm
Shipping port: Xiamen
Warranty: 12 months

Description

Integrating PROFIBUS DP fieldbus networks into Omron PLCs is simplified with the CJ1W-PRM21 CPU Bus Unit. Designed for high-speed decentralized control, this module acts as a PROFIBUS DP-V1 Class 1 and Class 2 Master, enabling seamless data exchange between the host controller and decentralized field devices. This module mounts directly onto a CJ-series CPU Rack or Expansion Rack, and is also fully compatible with NJ-series Controller Units. Utilizing standard RS-485 physical layer communication with galvanic isolation, it ensures reliable signal integrity in challenging industrial environments.

Features

Supports both PROFIBUS DP and DP-V1 protocols (Class 1 and Class 2 Master functionality).
Configurable node address range from 0 to 125 using network configuration software.
Physical interface features a galvanically isolated RS-485 port with a standard 9-pin sub-D female connector.
Accommodates up to 16 master units per NJ-series controller system.
Rotary switches on the front panel allow hardware assignment of CPU Bus Unit numbers from 0 to F Hex.

Applications

Automated manufacturing and assembly lines.
Process control and packaging systems.
Water and wastewater management infrastructure.
Integration of multi-vendor field devices into Sysmac CJ1/NJ control architectures.

Technical Specifications

Parameter	Specification
Manufacturer	Omron
Model / Part Number	CJ1W-PRM21
Unit Classification	CPU Bus Unit
Unit Version	3.0
Compatible Mounting Positions	CPU Rack, Expansion Rack
Applicable Unit Numbers	0 to F (Hex)
Maximum Units per NJ-series Controller	16
Current Consumption	400 mA max at 5 VDC
Applicable Standards	EN50170, Volume 2
Protocol Support	PROFIBUS DP, PROFIBUS DP-V1
Unit Types	PROFIBUS DP-V1 Class 1 and Class 2 Master
Media Type	RS-485, galvanically isolated from the CPU
Connector Type	9-pin sub-D female connector (#4/40 UNC thread)
Termination	According to EN50170, provided by the cable connector
Unit Device Address Range	0 to 125 (set via configurator)
Maximum Slave Devices	125 (address range 0 to 125)
Dimensions (W x H x D)	3.1 x 9.0 x 6.5 cm
Weight	0.10 kg

Connections and Interfaces

Interface Port	Connection Details
PROFIBUS Port	9-pin Sub-D female connector with #4/40 UNC retention threads
Unit Address Switches	Two rotary switches on the front panel for assigning hex addresses 0 to F

Installation Guidelines

Turn off the system power supply before mounting or removing the CPU Bus Unit.
Set the CPU Bus Unit number rotary switch to a unique value (0 to F Hex) before installation.
Ensure the module is securely locked into position on the CPU Rack or Expansion Rack.
Use only PROFIBUS-compliant shielded twisted-pair cables conforming to EN50170 Volume 2.
Ensure termination resistors are correctly engaged at the physical endpoints of the PROFIBUS network segment.

FAQ

What is the maximum number of slave devices supported by the CJ1W-PRM21?

The CJ1W-PRM21 supports up to 125 PROFIBUS slave devices within an address range of 0 to 125.

Is the CJ1W-PRM21 compatible with Omron NJ-series controllers?

Yes, this module is compatible with NJ-series Controller Units, allowing for up to 16 master units per controller.

What is the power consumption of the module?

The unit has a current consumption of 400 mA maximum at 5 VDC.

Does the module feature galvanic isolation?

Yes, the RS-485 interface on the CJ1W-PRM21 is galvanically isolated from the controller CPU.

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30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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