Omron CJ1W-DA08C 8-Channel Analog Output Module for CJ Series PLCs

Product Overview

The CJ1W-DA08C module converts digital data from the CPU unit into precision current output signals in the standard 4-20 mA range, which is widely used in industrial automation for analog signal transmission due to its immunity to voltage drop over long cable runs. Each of the eight outputs can be configured independently, with signal range options including the standard 4-20 mA current output as the primary operating mode. The ability to set the conversion time per point—selectable between 1 ms/point or a faster 250 μs/point when configured for 1/8000 resolution—provides system designers with flexibility to balance update speed against resolution requirements.

Key Features

• High Channel Density: 8 analog outputs in a single module saves rack space and reduces system cost

• Dedicated Current Outputs: 4-20 mA range ideal for loop-powered field devices

• Selectable Resolution: Standard 1/4000 resolution or high-resolution 1/8000 mode for precision applications

• Adjustable Conversion Speed: Standard 1 ms/point or high-speed 250 μs/point operation

• Removable Terminal Block: Simplifies wiring and facilitates module replacement without disturbing field wiring

• External Power Supply: Operates on 24 V DC external supply with 170 mA maximum current draw

• High Accuracy: ±0.3% of full scale accuracy at 25°C ambient temperature

• Removable Terminal Block: Facilitates easy wiring changes and module replacement without rewiring

Technical Specifications

Resolution and Conversion Speed Configuration

The CJ1W-DA08C offers flexible configuration options for resolution and conversion speed, allowing optimization for either precision or speed based on application requirements. In standard mode, the module provides a resolution of 1/4000 (approximately 12-bit equivalent) with a conversion time of 1 ms per point, which is suitable for most general-purpose process control applications. When higher resolution is required, the module can be configured for 1/8000 mode, which simultaneously increases resolution to approximately 13-bit equivalent and reduces conversion time to an ultra-fast 250 μs per point. This high-speed mode is particularly beneficial for applications requiring rapid analog output updates, such as high-dynamic motion control or fast-responding closed-loop systems.

System Integration with CJ Series

The CJ1W-DA08C module integrates seamlessly into Omron CJ series PLC systems, occupying a single unit number slot on the CPU rack or expansion I/O rack. Data exchange between the CPU unit and the analog output module occurs automatically during the system scan cycle, with the CPU writing output setpoint values to designated addresses in the DM Area or CIO Area. The module reads these digital values and converts them to analog current signals at the specified conversion speed. The unit number assignment is configured through the CX-Programmer software, providing flexible addressing options for systems with multiple analog I/O modules.

Applications

• Multi-Loop Process Control: Control of multiple PID loops with proportional valve positioners

• Industrial Actuators: Positioning of electric actuators and proportional solenoids

• Signal Distribution: Transmitting analog signals to remote I/O racks or display instruments

• SCADA and DCS Integration: Providing analog outputs to higher-level control systems

• Test and Calibration: Generating precision current signals for equipment testing

Environmental and Compliance Specifications

The CJ1W-DA08C is designed for reliable operation in industrial environments with an operating temperature range of 0°C to 55°C and storage temperature from -20°C to 75°C. The module accepts relative humidity from 10% to 90% non-condensing. It complies with international standards including UL and CE, confirming suitability for use in all major industrial markets. The module‘s immunity to electromagnetic interference ensures stable operation even when installed in control cabinets with AC drives and other sources of electrical noise.