Omron CJ1W-ID231 32-Point DC Digital Input Module

Technical Overview

The Omron CJ1W-ID231 is a high-density, 32-point DC digital input module engineered for the CJ1 and CJ2 series Programmable Logic Controllers (PLCs). Operating at 24 VDC, it accommodates both NPN and PNP configurations with polarity-independent inputs. This compact DIN-rail module is equipped with a configurable digital filter for advanced noise reduction and utilizes a space-saving 40-pin Fujitsu/FCN connector, making it highly suitable for fast-paced industrial control networks.

Key Features

32 high-speed digital input points in a single 20mm wide module
Selectable digital filter (0 to 32 ms) to minimize external signal noise
Supports both NPN and PNP field devices without requiring polarity selection
Rapid ON/OFF response capability up to 8.0 ms maximum
Space-saving 40-pin Fujitsu (FCN) connector interface for streamlined wiring
Direct compatibility with Omron CJ1 and CJ2 series automation systems

Technical Specification Matrix

Parameter	Value
Module Type	DC Digital Input Unit
Number of Inputs	32 Points (16 points/common, 2 circuits)
Rated Input Voltage	24 VDC
Operating Voltage Range	20.4 to 26.4 VDC
Input Impedance	5.6 kΩ
Input Current	4.1 mA typical (at 24 VDC)
ON Voltage/Current	19.0 VDC min. / 3.0 mA min.
OFF Voltage/Current	5.0 VDC max. / 1.0 mA max.
Response Time (ON/OFF)	8.0 ms max. (Configurable digital filter 0-32 ms)
Simultaneous ON Points	75% (12 points/common) at 24 VDC
Internal Current Consumption	90 mA max. (at 5 VDC)
External Connector	Fujitsu (FCN) Connector
Enclosure Rating	IP20
Operating Temperature	0 to +55 °C
Dimensions (H x W x D)	90 mm x 20 mm x 66.5 mm
Weight	70 g max.

Industrial Applications

1. High-Speed Packaging Conveyor Tracking

Integration with optical sensors and mechanical limit switches to track product positions precisely and dictate high-speed packaging sequences on conveyor lines.

Problem Solved

High-speed assembly environments suffer from electrical noise and require rapid, deterministic switching. The CJ1W-ID231 resolves this by offering a configurable digital noise filter (0 to 32 ms) and an 8.0 ms response time, preventing false triggers while tracking fast-moving items.

Configurable Digital Filter8.0 ms Response TimeOptical Sensors24 VDC

2. Multi-Zone Automated Assembly Cells

Aggregating digital signals from proximity sensors, operator push-buttons, and safety gates across a distributed multi-stage robotic assembly cell.

Problem Solved

PLC cabinets in multi-stage cells face strict space constraints. The CJ1W-ID231 condenses 32 high-speed digital inputs into a single 20mm-wide IP20 module using a high-density Fujitsu connector, maximizing DIN-rail real estate and reducing overall cabinet footprint.

High-Density I/O32-Point InputFujitsu Connector20mm FootprintIP20

3. Material Handling and Logistics Sorting

Controlling diverter gates, chute triggers, and sorting actuators in automated warehousing, interfacing with a diverse array of global sensor types.

Problem Solved

Automated logistics hubs often combine machinery from global vendors utilizing mixed PNP (sourcing) and NPN (sinking) outputs. Because the CJ1W-ID231 is completely polarity-independent, it allows direct integration of both sensor types without external converter relays, drastically reducing wiring complexity.

NPN/PNP Polarity-IndependentLogistics Sorting20.4 to 26.4 VDC5.6 kΩ Impedance