4-Channel Analog Input Unit CJ1W-AD04U for High-Speed Precision Monitoring

Product Overview

The Omron CJ1W-AD04U is a high-performance analog input unit from the renowned CJ Series, designed for seamless integration with Omron programmable controllers. This industrial-grade module provides precise conversion of analog signals into digital values, enabling accurate monitoring and control in automation systems. With four isolated input channels, the CJ1W-AD04U supports multiple voltage and current ranges, making it ideal for diverse industrial applications where reliable signal acquisition is critical.

Key Features and Benefits

• Multi-Channel Input: Four independent analog input channels for simultaneous measurement of multiple process variables
• Wide Signal Compatibility: Supports voltage inputs (0-5V, 1-5V, 0-10V, -10-10V) and current inputs (0-20mA, 4-20mA) with automatic range detection
• High Precision Conversion: 12-bit resolution (1/4000) ensures accurate measurement of analog signals with ±0.3% full-scale accuracy
• Rapid Sampling: Fast 250 μs conversion time per channel enables real-time process monitoring and control
• Robust Isolation: Photocoupler isolation between input channels and internal circuits prevents noise interference and protects the controller
• Compact Design: Space-saving 31mm width module fits easily in control panels with dimensions of 31(W) × 90(H) × 65(D) mm
• Low Power Consumption: Operates on 5V DC with maximum 100mA current draw for energy-efficient performance
• Industrial Durability: Designed for reliable operation in harsh industrial environments with 200g lightweight construction
• Standard Warranty: Backed by Omron's 1-year manufacturer warranty for guaranteed quality and reliability

Industrial Applications

The CJ1W-AD04U analog input module is engineered for demanding industrial automation applications including:

• Precision process control systems requiring accurate analog signal acquisition
• Continuous monitoring of industrial sensors (temperature, pressure, flow, level, etc.)
• Automated manufacturing systems for quality control and process optimization
• Data acquisition and logging in production environments
• Integration with test and measurement equipment for industrial diagnostics
• Building automation systems for environmental monitoring
• Energy management systems for power consumption analysis

Detailed Technical Specifications

Parameter	Specification
Model Number	CJ1W-AD04U
Input Channels	4 channels (individually configurable)
Voltage Input Ranges	0-5V DC, 1-5V DC, 0-10V DC, -10-10V DC
Current Input Ranges	0-20mA, 4-20mA
Input Impedance	Voltage: 1MΩ min, Current: 250Ω
Resolution	12-bit (1/4000)
Conversion Speed	250 microseconds per channel (all channels: 1ms)
Accuracy	±0.3% of full scale (at 25°C ±5°C)
Temperature Coefficient	±0.015% of full scale/°C
Maximum Input Voltage	±15V DC (voltage inputs), ±30V DC (current inputs)
Isolation	Photocoupler isolation between inputs and internal circuits
Power Supply	5V DC ±5%, 100mA max (supplied from CPU Unit or CJ1W-PA205)
Operating Temperature	0°C to 55°C (32°F to 131°F)
Storage Temperature	-25°C to 75°C (-13°F to 167°F)
Operating Humidity	10% to 90% (with no condensation)
Dimensions (W × H × D)	31 × 90 × 65 mm (1.22 × 3.54 × 2.56 in)
Weight	200g (0.44 lb)
Mounting	CJ-series CPU Rack or Expansion I/O Rack
Warranty	1 year manufacturer warranty

System Integration

The CJ1W-AD04U analog input module is designed for seamless integration with Omron CJ-series programmable controllers, including CJ1G/H/HE/HM CPU units. The module connects directly to the CPU backplane without requiring additional power supplies when used with appropriate CJ-series power supply units. Its compact form factor allows for high-density installations in control cabinets, while the screw terminal block ensures secure wiring connections for industrial environments.