The Omron CJ1W-AD081-V1 is a CJ-series Special I/O analog input unit that provides eight independent analog input channels for accurate acquisition of voltage and current signals in industrial automation systems. Each channel supports common industrial ranges including −10 to 10 V, 0 to 10 V, 0 to 5 V, 1 to 5 V, and 4 to 20 mA, making it suitable for connecting transmitters, sensors, inverters, and process instruments without additional signal conditioning modules.
With 13‑bit resolution (1:4000, configurable up to 1:8000) and typical A/D conversion times around 1 ms per channel (or 4000 ms per unit in slower, high‑accuracy modes), the CJ1W-AD081-V1 offers a good balance between precision and speed for most machine and process control applications. Input impedance is at least 1 MΩ for voltage inputs and 250 Ω for current inputs, minimizing loading effects and ensuring compatibility with standard 4–20 mA transmitters. The converted values are provided as 16‑bit binary data, and functions such as averaging, peak‑hold, scaling, and disconnection detection help improve measurement stability and simplify application programming.
The module connects to the PLC through the CJ I/O Bus as a Special I/O Unit and uses a single detachable screw terminal block (M3) for all field wiring, which simplifies installation and maintenance. It conforms to CJ‑series general specifications for noise immunity, dielectric strength, and environmental performance, with typical power consumption of about 520 mA at 5 VDC from the backplane, dimensions of 31 × 90 × 65 mm (W×H×D), and a maximum weight of 150 g. Typical applications include level, pressure, temperature (via transmitters), flow, and speed feedback in OEM machinery, process skids, and factory automation systems where multiple analog signals must be read into a CJ‑series PLC.
