Configured for high-speed multi-range analog signal acquisition in SYSMAC CJ Series platforms, the Omron CJ1W-AD042 (CJ1W-AD042 Analog Input Unit) provides direct physical/electrical execution.

Technical Identifier Matrix

• Brand: Omron
• Base Model: CJ1W-AD042
• Full Part Number: CJ1W-AD042
• Series Name: SYSMAC CJ Series
• Product Type: Analog Input Unit (4 Channels)
• Unit Classification: CJ-series Special I/O Unit

Hardware Specifications

PLC Controller Processing & Backplane Communication

The CJ1W-AD042 delivers high-speed analog signal digitization across the internal backplane bus velocity interface, executing conversions as fast as 20 us for 1 point to 35 us across all 4 points. High-density I/O density scaling allows rapid register updates directly to the CPU memory mapping. A digital isolator provides galvanic isolation between field inputs and internal controller logic without sacrificing data throughput. Direct conversion using the AIDC instruction is supported on compatible CJ2H-CPU[] (version 1.1 or later) and CJ2M-CPU[][] units, optimizing determinism and maintaining full firmware flash compatibility across CJ-series system architectures.

Package Contents & Ordering Information

• 1x Omron CJ1W-AD042 Analog Input Unit
• 1x 18-Point Detachable Terminal Block (M3 Screws)

Field Installation Guidelines

• Mounting: Insert the module into the assigned CJ-series rack position, aligning backplane bus connectors, and secure top/bottom locking latches to the DIN rail.
• Wiring: Connect voltage or current analog input conductors to the 18-point detachable terminal block using standard M3 screw terminations.
• Shielding: Encase analog input lines in twisted-pair cables with 360-deg braid shielding connected to the local panel earth terminal bus.
• Grounding: Secure a low-impedance copper strap from the host PLC rack functional earth (FE) terminal directly to the enclosure grounding bar.

Frequently Asked Questions

• What input signal options are available on the CJ1W-AD042 module?

  The CJ1W-AD042 supports 1 to 5 V, 0 to 10 V, -5 to +5 V, -10 to +10 V, and 4 to 20 mA analog input ranges across 4 channels.

• What conversion speeds does the CJ1W-AD042 achieve per point?

  The A/D conversion period executes at 20 us for 1 point, 25 us for 2 points, 30 us for 3 points, and 35 us for 4 points.

• Is channel-to-channel isolation available between input loops?

  A digital isolator isolates field I/O from controller signals, but no electrical isolation exists between individual input channels.

• What maximum overload values are tolerated on the input terminals?

  The maximum rated continuous input is +/-15 V for voltage input configurations and +/-30 mA for current input configurations.

• What physical dimensions apply to the CJ1W-AD042 hardware housing?

  The module physical dimensions measure 3.1 cm x 9.0 cm x 6.5 cm with an overall unit weight of 0.15 kg max.

• Which PLC controllers support the direct conversion AIDC instruction with this unit?

  Direct conversion (AIDC) is supported by CJ2H-CPU[] (unit version 1.1+) and CJ2M-CPU[][] CPU Units.

• What buffer sizes are available for mean value processing calculations?

  Mean value processing supports buffer sizes (n) of 2, 4, 8, 16, 32, 64, 128, 256, and 512 sample conversions.

• What is the current draw of the CJ1W-AD042 from the 5 VDC backplane bus?

  The module consumes up to 520 mA max. at 5 VDC (2.60 W total power consumption) from the system rack backplane.