Omron CJ1W-AD081-V1 CJ1 Series Analog Input Unit

Description

For high-density process data acquisition in industrial environments, the CJ1W-AD081-V1 serves as a reliable multi-channel analog input unit within the Sysmac CJ-series PLC platform. This module supports up to eight analog input channels on a single slot, making it highly efficient for cabinets with limited footprint. It interfaces directly with CJ1, CJ2, and compatible CPU racks via the system bus, facilitating rapid data transfers and streamlined diagnostic monitoring.

Each channel can be independently configured for different input signal types, allowing engineers to mix voltage and current signals on the same physical module. Key processing functions integrated directly into the hardware include scaling, peak hold, mean value processing, and input wire-disconnection detection, which reduces the computational load on the main CPU.

Features

• Supports up to 8 analog input channels in a compact single-slot width.
• Independently configurable inputs for voltage (1 to 5 V, 0 to 5 V, 0 to 10 V, -10 to 10 V) and current (4 to 20 mA).
• High-speed conversion rate of 250 microseconds per point (2 milliseconds total for all 8 points).
• High-resolution conversion mode up to 1/8000 (standard mode is 1/4000) for precise application control.
• Built-in digital filter function to suppress high-frequency process noise.
• Peak hold and valley hold functions for tracking transient process limits.
• Disconnection detection feature for 1 to 5 V and 4 to 20 mA input signals.

Applications

• Multi-zone temperature tracking and monitoring in thermal processing.
• Flow rate, level, and pressure transmitter integration in water treatment systems.
• Feedback control loops in plastic extrusion and chemical dosing machinery.
• Factory automation and process monitoring systems requiring high-density analog acquisition.

Technical Specifications

Connections and Interfaces

The unit features an 18-point detachable terminal block. Users can pre-wire the block before attaching it to the module. Terminal mappings should follow standard instrumentation wiring layouts:

Note: Terminals A10 through B18 follow a repeating functional layout for Inputs 5 through 8. When using current inputs, short-circuit the voltage input (V IN) and current input (I IN) terminals for that channel.

Installation Guidelines

• Always switch off the PLC system power supply before mounting or removing the module from the rack.
• Ensure the slide locks on the top and bottom of the unit are securely locked into the adjacent modules.
• To prevent electromagnetic interference, use shielded twisted-pair (STP) cables for all analog signal runs.
• Route analog I/O wiring separately from high-voltage, high-current AC power cables.
• Connect the shield wire of the input cables to the shield terminal (SLD) or ground them at the panel entry point.

Compliance and Certifications

• CE Mark Directive compliant
• UL and cULus listed
• Lloyd's Register approved for marine installations