Omron CJ1W-DRM21 CJ Series DeviceNet Master/Slave Unit 32,000 Points

Omron CJ-series DeviceNet Unit that can be used as either a master or a slave on a DeviceNet network, or both simultaneously. Supports control of up to 32,000 I/O points per master unit when configured with a configurator, ensuring high data synchronisation for remote I/O communications and message services. As an open network conforming to standardised DeviceNet specifications, it enables the integration of multi‑vendor field devices such as valves, sensors, and actuators with minimal wiring.

Applications:

• Distributed I/O control in factory automation systems

• Multi‑vendor DeviceNet network integration

• Machine automation with remote I/O, drives, and sensors

• Flexible master/slave system configurations on a single bus

Core Specifications:

• Device type: CJ1 CPU Bus Unit (CJ‑series)

• Network protocol: DeviceNet (open network)

• Functionality: Master and/or slave (selectable, can operate simultaneously)

• Maximum I/O points (master): 2,048 points (fixed allocation) / 16,000 points (user‑set, DM Area) / 32,000 points (configurator)

• Maximum I/O points (slave): 32 points (fixed allocation) / 3,200 points (user‑set, DM Area) / 4,800 points (configurator)

• Max. number of nodes: 64 nodes per network (63 slaves + 1 master)

• Communications: Remote I/O (fixed or user‑set allocations), message communications (explicit)

• Baud rate: Selectable 125 kbps, 250 kbps, or 500 kbps

• Communications media: Special 5‑wire cables or 4‑wire flat cables

• Unit numbers allocated: 1

• Current consumption: 5 V DC, 0.29 A (max. 290 mA); 24 V DC communications power supply required externally

• Dimensions (W × H × D): 31 mm × 90 mm × 78.7 mm

• Weight: 120 g max.

• Operating temperature: 0 °C … 55 °C

Advanced Specifications:

• Connection methods: Multi‑drop and T‑branch (trunk and branch lines can be combined)

• Max. number of mountable Units per controller: Up to 16 (user‑set allocations)

• Communications power supply: 24 V DC (11 … 25 V DC), supplied externally

• Communications distance (500 kbps, thick 5‑wire cable): Network length ≤ 100 m, branch line ≤ 6 m, total branch line ≤ 39 m

• Communications distance (250 kbps, thick 5‑wire cable): Network length ≤ 250 m, branch line ≤ 6 m, total branch line ≤ 78 m

• Communications distance (125 kbps, thick 5‑wire cable): Network length ≤ 500 m, branch line ≤ 6 m, total branch line ≤ 156 m

• Message length (max.): 542 bytes

• Terminators required at both ends of trunk line

Compatibility information:

• Compatible with Omron SYSMAC CJ‑series PLC racks (CJ I/O Bus).

• Also compatible with NJ‑series Machine Automation Controllers (note: simple backup and DeviceNet Configurator cannot be used with NJ‑series; use CX‑Integrator instead).

• Mounts on CPU Rack or Expansion Rack via CJ I/O Bus.

• For detailed network setup and configuration, refer to the DeviceNet Operation Manual (W267) and CJ-series DeviceNet Units Operation Manual (W497).

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information (cULus, UC1, N, L, CE).

Related Products:

• CS1W-DRM21(-V1) – CS‑series DeviceNet Master/Slave Unit

• CX‑One FA Integrated Tool Package (CXONE-AL01D-V4) – Includes CX‑Integrator for DeviceNet configuration

• DRT2 series – DeviceNet remote I/O slave terminals (digital, analog, safety)

• XWT series – DeviceNet remote I/O terminals

• 3G8F7-DRM21 – DeviceNet PCI board for PC interface