Omron CJ1W-DRM21 CJ Series DeviceNet Unit

Description

Integrating modular automation networks requires reliable communication interfaces, and the CJ1W-DRM21 delivers this capability as a dedicated DeviceNet master/slave module. Engineered specifically for integration with Omron CJ and NJ Series programmable controllers, this module permits seamless communication between the host CPU and distributed field devices. It functions simultaneously as both a master and a slave, allowing for highly flexible network topologies and centralized control configurations.

The unit supports standard DeviceNet physical layers, enabling multi-drop and T-branch cable topologies. It integrates with network configurators to manage complex mapping of I/O data and message communication. With its compact form factor, the module slots directly onto the CJ/NJ backplane, drawing power from the system while utilizing an external DC supply for the transceivers to maintain electrical isolation across the fieldbus.

Features

• Dual-function support operating as a DeviceNet Master, Slave, or both simultaneously.
• Flexible networking capabilities allowing combinations of multi-drop and T-branch physical connection topologies.
• User-selectable baud rates supporting 125 Kbps, 250 Kbps, and 500 Kbps.
• High node capacity supporting up to 64 physical addresses, including Masters, Slaves, and Configuration software.
• Explicit message communication capability with a maximum message length of 542 bytes.
• Internal diagnostic indicators for rapid troubleshooting of network and module status.

Applications

• Distributed I/O networks in high-speed manufacturing assembly lines.
• Packaging, sorting, and material handling systems requiring multi-vendor device interoperability.
• Process control systems utilizing Omron CJ/NJ series host architectures.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting: Lock the module securely to the bus connector of the CJ/NJ backplane using the top and bottom interlocking sliders. Do not hot-swap the module while the system power is active.
• Wiring: Keep DeviceNet communication lines separate from high-voltage AC power lines to avoid electromagnetic interference. Securely ground the drain wire at a single point.
• Power Sequencing: Apply power to the external DeviceNet communication supply before or simultaneously with the PLC system power supply to prevent initialization faults.