OMRON CP1H Series Modules

Technical Dossier

Product Details And Specifications

OMRON CP1H Series: Comprehensive Module Range and Technical Overview

The OMRON CP1H series represents a high-performance compact PLC platform deployed extensively across global heavy industry sectors including petrochemical plants, refinery control systems, nuclear facility auxiliary systems, and large-scale discrete manufacturing lines. Introduced as the successor to the CP1E and a peer-class alternative to the CJ1M, the CP1H occupies a critical tier in OMRON's control architecture: it delivers CJ-series-level processing power in a compact DIN-rail form factor. Its installed base spans facilities in Japan, China, Southeast Asia, the Middle East, and Europe, making it one of the most widely maintained compact PLC platforms in the global industrial spare parts market.

The CP1H supports up to 320 I/O points via expansion units, integrates a built-in USB programming port, and offers optional analog I/O, pulse output, and serial communication capabilities without requiring external option boards in many configurations. Its role in long-cycle industrial processes — where replacement downtime is measured in production losses rather than hours — makes lifecycle parts availability a critical procurement concern.

The Evolution of CP1H Architecture

The CP1H was launched by OMRON in the mid-2000s as a direct response to demand for a compact PLC with high-speed pulse control and analog integration. It was built on the same instruction set as the CS/CJ series, enabling code portability across OMRON's mid-range and high-end platforms.

Early Generation (2005–2010): Initial CP1H units featured the X-type (40-point relay/transistor) and Y-type (100-point) CPU configurations. These units established the platform's reputation for reliable pulse output control in motion-adjacent applications such as servo positioning without a dedicated motion controller.

Mid-Generation (2010–2016): OMRON expanded the CP1H ecosystem with enhanced analog option boards (CP1W-MAD11, CP1W-MAD42) and serial communication boards (CP1W-CIF01, CP1W-CIF11), enabling integration into legacy RS-232C and RS-422/485 networks common in older plant infrastructure.

Mature/Maintenance Phase (2016–Present): The CP1H series has entered its mature lifecycle phase. OMRON continues to manufacture and support the line, but new installations increasingly favor the CP2E and NX1P2 platforms. For existing CP1H installations, the primary market activity is now spare parts procurement, repair, and lifecycle extension — not new deployment. This makes verified surplus and refurbished CP1H units a strategically important supply category.

Compatibility note: CP1H CPUs are not directly interchangeable with CJ1/CJ2 CPUs despite sharing instruction sets. Expansion I/O units (CP1W series) are CP1H-specific and are not compatible with CS/CJ backplane racks.

CP1H Full Catalog & Functionalities (SKU List)

CPU Units — X-Type (40 I/O, Relay/Transistor Output)

• CP1H-X40DR-A: 40-point CPU, 24 DC inputs / 16 relay outputs, AC power supply, RS-232C port
• CP1H-X40DT-D: 40-point CPU, 24 DC inputs / 16 transistor (NPN) outputs, DC power supply
• CP1H-X40DT1-D: 40-point CPU, 24 DC inputs / 16 transistor (PNP) outputs, DC power supply
• CP1H-X40DR-D: 40-point CPU, 24 DC inputs / 16 relay outputs, DC power supply

CPU Units — Y-Type (100 I/O, High-Density)

• CP1H-Y20DT-D: 20-point CPU (Y-type), 12 DC inputs / 8 transistor (NPN) outputs, DC power supply, built-in analog I/O
• CP1H-Y20DT1-D: 20-point CPU (Y-type), PNP transistor outputs, built-in analog I/O, DC power supply

CPU Units — XA-Type (40 I/O + Built-in Analog)

• CP1H-XA40DR-A: 40-point CPU with built-in 4 analog inputs / 2 analog outputs, relay outputs, AC power supply
• CP1H-XA40DT-D: 40-point CPU with built-in analog I/O, transistor (NPN) outputs, DC power supply
• CP1H-XA40DT1-D: 40-point CPU with built-in analog I/O, transistor (PNP) outputs, DC power supply

Expansion I/O Units (CP1W Series)

• CP1W-40EDR: 40-point expansion I/O unit, 24 inputs / 16 relay outputs
• CP1W-20EDR1: 20-point expansion I/O, 12 inputs / 8 relay outputs
• CP1W-16ER: 16-point relay output expansion unit
• CP1W-8ED: 8-point DC input expansion unit

Analog & Communication Option Boards

• CP1W-MAD11: Analog I/O option board, 2 analog inputs / 1 analog output, 0–10V / 4–20mA
• CP1W-MAD42: Analog I/O option board, 4 analog inputs / 2 analog outputs
• CP1W-CIF01: RS-232C serial communication option board
• CP1W-CIF11: RS-422A/485 serial communication option board
• CP1W-CIF41: Ethernet option board for CP1H, 100BASE-TX

Sourcing Hard-to-Find & Obsolete CP1H Parts

As the CP1H series transitions deeper into its maintenance lifecycle, procurement teams at chemical plants, water treatment facilities, and power generation sites increasingly encounter two supply challenges: extended lead times from authorized distributors and outright discontinuation of specific option boards and expansion units.

DriveKNMS maintains a dedicated inventory of CP1H series components sourced through verified industrial surplus channels, OEM overstock, and decommissioned equipment recovery. All units are catalogued by part number, firmware revision where applicable, and physical condition grade. For facilities operating CP1H systems under long-term service contracts (5–15 year horizons), DriveKNMS offers reserved stock agreements to guarantee parts availability against scheduled maintenance windows.

Specific procurement support includes: discontinued CP1W option boards, legacy CPU units with older firmware revisions required for compatibility with existing programs, and matched sets of CPU + expansion units for direct swap-in replacement without reprogramming.

Quality Control for the CP1H Range

CP1H units undergo a structured inspection and functional verification protocol at DriveKNMS prior to dispatch. The process addresses the specific failure modes documented in this platform's field history.

Inspection steps include: visual examination of the CPU front panel, terminal blocks, and option board slots for physical damage or corrosion; power-on verification confirming correct LED status indication (PWR, RUN, ERR/ALM, INH); USB and RS-232C port continuity testing; I/O point functional scan using a dedicated test harness covering all 24 input and 16 output channels on X40-type units; and where applicable, analog I/O calibration verification against factory tolerance specifications (±0.3% full scale for voltage, ±0.5% for current).

Units with option boards installed are tested with boards seated to verify backplane communication integrity. Any unit exhibiting ERR/ALM LED activation during power-on is quarantined for fault code extraction via CX-Programmer before disposition decision.