The Omron CJ1W-DA08V, also cataloged as the CJ1W-DA08V Analog Output Unit, operates as a dedicated hardware component for multi-channel digital-to-analog voltage conversion within Omron CJ-series PLC systems.

Technical Identifier Matrix

• Base Part Number: CJ1W-DA08V
• Brand: Omron
• Classification: Special I/O Unit
• Allocated Unit Numbers: 1 unit number allocated
• Output Channel Count: 8 High-Density Voltage Outputs

Hardware Specifications

Backplane Bus Velocity & High-Density Signal Scaling

The Omron CJ1W-DA08V interfaces directly with the high-speed CJ-series backplane bus, driving 8 independent analog voltage output channels within a single slot footprint. Operating as a Special I/O Unit, the module routes internal digital register words to high-precision D/A converters, maintaining strict timing execution across all assigned output points.

Channel resolution and conversion timing operate under a coupled dependency architecture: standard 1/4,000 resolution updates at 1 ms per point, while high-resolution mode provides 1/8,000 resolution at 250 us per point. Signal ranges (1 to 5 V, 0 to 5 V, 0 to 10 V, and -10 to 10 V) are configured independently per channel via CPU Special I/O Unit memory allocations. Internal firmware flash compatibility ensures zero backplane bus latency during high-density cyclic data refreshes.

Package Contents & Ordering Information

• 1x Omron CJ1W-DA08V Analog Output Unit
• 1x Removable Terminal Block Assembly
• 1x Hardware Installation Sheet

Field Installation Guidelines

• Rack Mounting: Slide the CJ1W-DA08V onto the CJ-series CPU Rack or Expansion Rack DIN rail until top and bottom locking levers click firmly into position.
• Unit Number Allocation: Set the front-panel rotary unit number switch (0 to 95) prior to system energization to assign dedicated memory addresses.
• Power & Field Wiring: Connect an external 24 VDC (+10% -15%) auxiliary power source to the designated terminal block pins. Route individual voltage output signals using twisted-pair shielded cabling.
• Grounding & Shielding: Terminate cable braid shields to the functional earth (FE) terminal block connection. Secure a dedicated 2.0 mm sq or larger copper ground wire from the PLC rack ground terminal to protective earth using a 360-deg braid clamp.

Frequently Asked Questions

• What is the 5 VDC backplane current consumption of the CJ1W-DA08V?

  The CJ1W-DA08V draws 0.14 A at 5 VDC directly from the internal CJ-series CPU backplane bus.

• What are the external power supply requirements for the module?

  The unit requires an external auxiliary supply of 24 VDC (+10% -15%) rated at 140 mA maximum.

• Can output resolution and conversion speed be configured independently?

  No, setting 1/4,000 resolution forces a 1 ms/point speed, while 1/8,000 resolution forces a 250 us/point conversion speed.

• Are individual output signal ranges configurable per channel?

  Yes, each of the 8 output channels can be assigned separate voltage ranges (1-5 V, 0-5 V, 0-10 V, -10 to 10 V).

• Does the CJ1W-DA08V support hot-swapping while the rack is powered?

  No, input power to the CPU Rack or Expansion Rack must be disconnected before installing or removing the unit.

• How many Special I/O Unit numbers does the CJ1W-DA08V occupy?

  The module allocates exactly 1 Special I/O Unit number in the CPU memory map.

• What field termination hardware is supplied with the unit?

  The CJ1W-DA08V features an 18-point removable terminal block for all field output signals and external 24 VDC power connections.

• What is the overall signal conversion accuracy at room temperature?

  The conversion accuracy is +/-0.3% of Full Scale (F.S.) at an ambient temperature of 25 deg C.