Omron CJ1W-AD04U CJ Series Isolated Universal Analog Input Unit 4 Channels

Omron CJ1W-AD04U is a CJ-series isolated-type universal analog input unit that handles four independent input channels, each configurable for thermocouple, platinum resistance thermometer (RTD), current, or voltage signals. Combines multiple sensor types in a single unit, reducing component inventory and panel space while improving system flexibility. Each channel is isolated for signal integrity, and integrated process value alarms and scaling functions reduce CPU programming load.

Applications:

• Multi-sensor process monitoring in single unit

• Temperature measurement with thermocouple or RTD sensors

• Analog signal acquisition from pressure, flow and level transmitters

• OEM systems requiring mixed input types in space-constrained panels

Core Specifications:

• Product type: CJ‑series Special I/O Unit, Isolated Universal Input Unit

• Number of inputs: 4, individually configurable per channel

• Supported input types: Pt100, JPt100, Pt1000 (RTD); K, J, T, L, R, S, B (thermocouple); 4‑20 mA, 0‑20 mA (current); 1‑5 V, 0‑5 V, 0‑10 V (voltage)

• Conversion speed: 250 ms for all 4 inputs

• Resolution (voltage/current): 1/12,000

• Accuracy at 25 °C: RTD (Pt100, JPt100, Pt1000): (±0.3 % of PV or ±0.8 °C, whichever is larger) ±1 digit max.; Thermocouple (K,J,T,L,R,S,B): (±0.3 % of PV or ±1.5 °C, whichever is larger) ±1 digit max.; Voltage/current: ±0.3 % of full scale ±1 digit max.

• Input isolation: Isolated between channels

• Current consumption: 5 V DC, 0.32 A

• External connection: Removable terminal block (screw type)

• Number of unit numbers allocated: 1

• Dimensions (W × H × D): 31 mm × 90 mm × 65 mm

• Weight: 150 g max.

• Operating temperature: 0 °C … 55 °C

Advanced Specifications:

• Applicable controllers: CJ1/CJ2/NJ series

• Mounting position: CPU Rack or Expansion Rack of CJ series device

• Maximum number of mountable Units: up to 40 per system

• Unit number setting: 00 to 95 (rotary switch)

• Data exchange with CPU Unit: 10 words in CIO Area (operation data) + 100 words in DM Area (setting parameters) + 1 word in Expansion Setting Area

• Built-in functions: process value scaling (voltage/current), process value alarms (L/H per input), zero/span adjustment, input error detection, cold junction sensor error detection, °C/°F conversion (temperature inputs)

• Temperature coefficient: ±100 ppm/°C max. for full scale

• Self-diagnosis function: LED indication

• Terminal tightening torque: 0.5 N·m

• Ambient humidity: 10 % … 90 % RH (non‑condensing)

• Storage temperature: –20 °C … +75 °C

• External connection method: 18‑point removable terminal block (M3 screws)

• Conformity: UC1, L, CE

System Integration:

• The unit is part of the Omron SYSMAC CJ‑series and is mounted on the CPU Rack or Expansion Rack of CJ/NJ series controllers.

• Input types are individually selected via DM Area settings using CX‑Programmer; each channel can be set to a different sensor type.

• The unit occupies one Special I/O Unit slot and is allocated one unit number (00‑95). Up to 40 units can be installed per system.

Related Products:

• Entry level – CJ1W‑AD081‑V1 (8 channels, voltage/current only, standard 1/4000 resolution, higher I/O count in single rack)

• Current model – CJ1W‑AD04U (4 channels, universal input including thermocouple/RTD, 1/12,000 resolution, 250 ms conversion, isolated)

• Higher resolution alternative – CJ1W‑PH41U (high‑resolution model for semiconductor production equipment, up to 1/256,000 resolution, 60 ms conversion, same universal inputs)

• Accessory – XW2D‑40G6 (terminal block for MIL connector conversion)