The Omron CJ1W-DA042V, also cataloged as the CJ1W-DA042V Analog Output Unit, operates as a dedicated hardware component for high-speed digital-to-analog voltage signal conversion within Omron CJ-series PLC systems.

Technical Identifier Matrix

• Base Part Number: CJ1W-DA042V

• Brand: Omron

• Classification: Special I/O Unit

• Allocated Unit Numbers: 1 unit number allocated

• Output Channel Count: 4 High-Speed Voltage Outputs

Hardware Specifications

Backplane Bus Velocity & Firmware Compatibility

The Omron CJ1W-DA042V interfaces directly with the high-speed CJ-series backplane bus to deliver direct digital-to-analog conversion across 4 independent voltage output channels. Operating as a Special I/O Unit, it executes internal D/A updates at hardware speeds down to 20 us for 1 point and 35 us for 4 points, enabling real-time motion control and fast actuator response.

The unit supports channel-specific output configuration, allowing mixed signal ranges (1 to 5 V, 0 to 10 V, and -10 to 10 V) across a single module. Internal firmware registers synchronize output data across allocated Special I/O Unit memory areas during backplane refresh, maintaining signal accuracy (+/-0.3% of F.S. at 25 deg C) without impacting CPU scan cycle velocity.

Package Contents & Ordering Information

• 1x Omron CJ1W-DA042V Analog Output Unit

• 1x Removable Terminal Block Assembly

• 1x Hardware Installation Sheet

Field Installation Guidelines

• Rack Mounting: Mount the CJ1W-DA042V onto the CJ-series CPU Rack or Expansion Rack, sliding the unit along the DIN rail guide until top and bottom locking levers click into place.

• Unit Number Setting: Set the rotary unit number switch on the front panel (0 to 95) before restoring system power to allocate Special I/O Unit memory words.

• Field Wiring: Wire voltage output devices to the removable terminal block using twisted-pair shielded cables to suppress electromagnetic interference.

• Grounding & Shielding: Terminate cable braid shields at a single point to the functional earth (FE) terminal using a 360-deg braid clamp. Ensure the rack ground wire is at least 2.0 mm sq.

Frequently Asked Questions

• What is the backplane current consumption for the CJ1W-DA042V?

  The CJ1W-DA042V draws a nominal current of 0.40 A at 5 VDC directly from the internal CJ backplane power bus.

• What are the conversion speeds for different output channel configurations?

  Conversion timing is 20 us for 1 point, 25 us for 2 points, 30 us for 3 points, and 35 us for all 4 output points combined.

• Can output voltage ranges be configured independently per channel?

  Yes, signal ranges (1 to 5 V, 0 to 10 V, -10 to 10 V) are configured separately for each individual output channel.

• Is hot-swapping supported for the CJ1W-DA042V on an active backplane?

  No, power to the CPU Rack and connected Expansion Racks must be completely isolated before inserting or removing the unit.

• What digital resolution does the CJ1W-DA042V provide for output ranges?

  Resolution is 1/10,000 for 1 to 5 V, 1/20,000 for 0 to 10 V, and 1/40,000 for -10 to 10 V signal ranges.

• What field termination hardware is supplied with the CJ1W-DA042V?

  The module includes a front-mounted removable terminal block for field output wiring connections.

• How many unit numbers are allocated to the CJ1W-DA042V in CPU memory?

  The unit allocates exactly 1 Special I/O Unit number within the CPU unit memory area.

• What cable shielding procedure minimizes high-frequency noise on voltage outputs?

  Use shielded twisted-pair conductors with a 360-deg braid ground connection linked directly to protective earth.