OMRON CP1W Series Modules: CP1W-DA041

Technical Dossier

Product Details And Specifications

OMRON CP1W Series: Comprehensive Module Range and Technical Overview

The OMRON CP1W series is a family of expansion I/O and function modules designed for use with the CP1H, CP1L, and CP1E programmable logic controllers. These units are deployed across global heavy industry sectors including petrochemical refining, nuclear auxiliary systems, pharmaceutical batch processing, and continuous-process manufacturing. The CP1W platform occupies a critical position in mid-range PLC infrastructure, offering a compact DIN-rail form factor with deterministic bus communication and a broad I/O expansion capability. Installed base counts in the hundreds of thousands of units globally, making long-term spare parts availability a primary operational concern for maintenance engineers and procurement teams.

The Evolution of CP1W Architecture

The CP1W expansion bus was introduced alongside the CP1H controller platform in the mid-2000s as OMRON's response to demand for a modular, cost-effective PLC system below the CJ-series tier. Early CP1W modules used a parallel expansion connector with a proprietary 34-pin interface, providing synchronous data exchange with the host CPU at cycle times aligned to the main scan rate.

As the platform matured through successive CP1L and CP1E CPU generations, the CP1W module pinout and electrical specification remained backward-compatible, allowing legacy expansion modules to operate with newer host controllers without hardware modification. This architectural decision extended the effective service life of the CP1W module range well beyond typical PLC generation cycles.

By the 2010s, the CP1W series entered a mature/stable lifecycle phase. OMRON continued to manufacture the core I/O range but ceased development of new module variants, directing new feature development toward the CJ2 and NX/NJ platforms. As of 2026, the CP1W series is classified as a long-term supply (LTS) product line by OMRON, meaning production continues but no new models are introduced. Maintenance engineers operating CP1W-based systems should establish strategic spare parts inventories, as future end-of-life announcements are probable within the next 5–10 years.

CP1W Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked CP1W expansion modules. Each entry reflects a distinct hardware configuration with a unique I/O count, signal type, or communication function.

Analog Output Modules

• CP1W-DA041: 4-channel analog output, 1–5 V / 0–10 V / 4–20 mA, 12-bit resolution
• CP1W-DA021: 2-channel analog output, voltage/current selectable, 12-bit resolution
• CP1W-DA08V: 8-channel analog voltage output, 0–10 V, 1–5 V, 12-bit
• CP1W-DA08C: 8-channel analog current output, 4–20 mA, 12-bit resolution

Analog Input Modules

• CP1W-AD041: 4-channel analog input, voltage/current, 12-bit resolution
• CP1W-AD081: 8-channel analog input, multi-range, 12-bit resolution
• CP1W-MAD11: 2-channel analog input + 1-channel analog output, mixed I/O module
• CP1W-MAD44: 4-channel analog input + 4-channel analog output, mixed I/O

Digital Input Modules

• CP1W-8ED: 8-point digital input expansion, 24 VDC, NPN/PNP selectable
• CP1W-16ED: 16-point digital input expansion, 24 VDC
• CP1W-32ED: 32-point digital input expansion, 24 VDC, high-density

Digital Output Modules

• CP1W-8ET: 8-point transistor output, NPN, 24 VDC, 0.5 A per point
• CP1W-8ET1: 8-point transistor output, PNP, 24 VDC, 0.5 A per point
• CP1W-16ET: 16-point transistor output, NPN, 24 VDC
• CP1W-16ET1: 16-point transistor output, PNP, 24 VDC
• CP1W-8ER: 8-point relay output, 250 VAC / 24 VDC, 2 A per point

Temperature Input Modules

• CP1W-TS001: 2-channel thermocouple input, K/J/T/E/L/U/N types supported
• CP1W-TS002: 4-channel thermocouple input, multi-type
• CP1W-TS101: 2-channel Pt100 RTD input, -200 to +850°C range
• CP1W-TS102: 4-channel Pt100 RTD input, high-accuracy

Communication & Special Function Modules

• CP1W-CIF01: RS-232C serial communication port expansion
• CP1W-CIF11: RS-422A/485 serial communication port expansion
• CP1W-CIF41: USB-to-serial bridge adapter for CP1-series CPUs
• CP1W-EXT01: I/O expansion unit connector for extending module bus

Sourcing Hard-to-Find & Obsolete CP1W Parts

DriveKNMS maintains a dedicated inventory program for CP1W series modules, including units that have been discontinued by OMRON regional distributors. Our sourcing network covers manufacturer-surplus stock, decommissioned equipment recovery, and verified third-party refurbishment channels.

For facilities operating CP1W-based control systems beyond their original design life, DriveKNMS provides lifecycle extension support including: cross-reference identification for functionally equivalent replacement modules, condition assessment for used units prior to deployment, and batch procurement for planned maintenance shutdowns. All CP1W modules supplied by DriveKNMS are individually tested against OMRON's published electrical specifications before shipment.

Quality Control for the CP1W Range

CP1W expansion modules communicate with the host CPU via a proprietary parallel backplane bus. Failure modes specific to this architecture include bus connector pin oxidation, internal DC/DC converter degradation on analog modules, and firmware checksum errors on communication modules.

DriveKNMS applies a structured test protocol to all CP1W units:

• Backplane connector inspection and contact resistance measurement (<50 mΩ threshold)
• Power rail verification: 5 VDC internal bus within ±2% tolerance
• For analog output modules (including CP1W-DA041): full-scale linearity test across all channels, load regulation test at rated output current, and isolation resistance check between signal and chassis ground
• For digital I/O modules: point-by-point switching test at rated voltage and current
• For communication modules: loopback test at maximum baud rate (115,200 bps for CIF01)
• Final burn-in: 4-hour powered soak at 40°C ambient prior to packaging