OMRON C200H Series Modules – C200H-MR833

Technical Dossier

Product Details And Specifications

OMRON C200H Series: Comprehensive Module Range and Technical Overview

The OMRON C200H is a mid-range modular programmable logic controller series that achieved widespread deployment across global heavy industry sectors including petrochemical refining, nuclear auxiliary systems, pharmaceutical batch processing, and continuous-process manufacturing. Introduced in the late 1980s and reaching peak installed base through the 1990s, the C200H platform became a de facto standard for medium-complexity automation tasks requiring deterministic scan times, robust I/O expansion, and multi-rack configurations. Installations remain active in refineries across the Middle East, chemical complexes in Europe, and legacy power generation facilities throughout Asia-Pacific. The C200H-MR833 is a memory cassette module within this platform, providing battery-backed RAM storage for ladder logic programs and data retention across power cycles — a critical component for any facility maintaining long-term C200H system integrity.

The Evolution of C200H Architecture

The C200H platform was developed as a successor to the OMRON C200 and C120 series, introducing a backplane-based rack architecture that allowed modular expansion across up to 3 expansion racks (plus the CPU rack), supporting up to 512 I/O points in standard configuration and up to 1,184 points with high-density modules. The CPU rack accepts a dedicated CPU module, power supply, and up to 10 I/O or special function modules per rack.

Architecturally, the C200H uses a proprietary parallel backplane bus for I/O communication, distinguishing it from later OMRON platforms (C200HX/HG/HE, CS1, CJ1) that migrated to higher-speed internal buses and eventually EtherNet/IP connectivity. This backplane design creates a hard compatibility boundary: C200H modules are not electrically or mechanically interchangeable with C200HX/HG/HE modules without verified cross-reference. The CS1 and CJ1 series represent the modern architectural successors, with CS1 offering a direct migration path for large C200H installations via adapter units.

Memory architecture evolved across CPU generations: early C200H CPUs used EPROM-based program storage requiring UV erasure, while later models (CPU01-E, CPU03-E, CPU11-E, CPU23-E, CPU31-E, CPU43-E) supported battery-backed RAM cassettes such as the C200H-MR833 and flash memory options. The MR833 specifically provides 32K-word RAM capacity with battery backup, compatible with the CPU-E suffix generation of C200H processors.

C200H Full Catalog & Functionalities (SKU List)

CPU Modules

• C200H-CPU01-E: Entry-level CPU, 512 I/O pts, 3.2K word program memory
• C200H-CPU03-E: Standard CPU, 512 I/O pts, 6.4K word program memory
• C200H-CPU11-E: Mid-range CPU, 512 I/O pts, 15.2K word program memory
• C200H-CPU23-E: Enhanced CPU with data link, 512 I/O pts, 30.2K word program
• C200H-CPU31-E: High-capacity CPU, 512 I/O pts, 62.2K word program memory
• C200H-CPU43-E: Top-tier CPU, 512 I/O pts, 62.2K word + extended data memory

Memory Cassette Modules

• C200H-MR833: 32K-word battery-backed RAM cassette for CPU-E series
• C200H-MR431: 4K-word RAM cassette, early CPU compatibility
• C200H-MP831: EPROM cassette, 32K-word, UV-erasable program storage

Digital Input Modules

• C200H-ID212: 16-pt DC 12/24V input module, NPN/PNP selectable
• C200H-ID215: 16-pt DC 24V input, high-speed response, 0.5ms filter
• C200H-ID501: 32-pt DC 12/24V input, high-density format

Digital Output Modules

• C200H-OD212: 16-pt transistor output, NPN, 0.5A per point, DC 12/24V
• C200H-OD215: 16-pt transistor output, PNP, 0.5A per point, DC 24V
• C200H-OA222: 8-pt triac output, AC 100-240V, 0.5A per point
• C200H-OC222: 8-pt relay output, 2A per point, AC/DC mixed load

Analog Modules

• C200H-AD003: 4-ch analog input, 12-bit resolution, 0–10V / 4–20mA
• C200H-DA003: 2-ch analog output, 12-bit resolution, 0–10V / 4–20mA

Communication & Special Function Modules

• C200H-LK201-V1: Host Link / RS-232C communication module
• C200H-ASC11: ASCII / BASIC module for serial protocol handling
• C200H-CT001-V1: High-speed counter module, 50kHz single-phase input

Power Supply Modules

• C200H-PA204: AC 100-240V input power supply, 5VDC 4.6A output
• C200H-PD024: DC 24V input power supply, 5VDC 3.6A output

Sourcing Hard-to-Find & Obsolete C200H Parts

OMRON officially discontinued the C200H series and transitioned support to the CS1/CJ1 platform. As of 2026, the C200H is classified as end-of-life (EOL) with no new production. This creates a critical supply gap for facilities that cannot justify a full control system migration — a capital-intensive project that may require revalidation under IEC 61511 (functional safety) or FDA 21 CFR Part 11 (pharmaceutical) frameworks.

DriveKNMS maintains a dedicated inventory of C200H modules sourced through verified industrial surplus channels, decommissioned plant buyouts, and authorized distributor overstock. All units are catalogued by part number, hardware revision, and firmware version where applicable. For memory cassettes such as the C200H-MR833, battery condition is assessed and replaced as part of the refurbishment process prior to dispatch. DriveKNMS provides lifecycle extension support including cross-reference identification (C200H to C200HX/HG/HE compatibility mapping), obsolescence advisory, and multi-unit lot sourcing for facilities maintaining spare parts pools under IEC 62402 obsolescence management guidelines.

Quality Control for the C200H Range

C200H modules present specific test challenges due to their parallel backplane bus architecture and the age profile of available stock. DriveKNMS applies the following verification procedures to all C200H units:

• Backplane bus integrity test: Each module is seated in a live C200H test rack and scanned for bus communication errors, addressing conflicts, and I/O response latency outside specification.
• CPU functional verification: CPU modules are loaded with a standardized ladder test program covering timer, counter, data move, and arithmetic instructions. Scan time is measured and compared against published specifications.
• Memory cassette validation: RAM cassettes including the C200H-MR833 undergo full read/write cycle testing across the entire address space. Battery voltage is measured; batteries below 2.8V are replaced with OEM-equivalent lithium cells.
• I/O point-level testing: All digital input and output points are individually exercised. Analog modules are calibrated against a traceable reference standard with linearity and offset error recorded.
• Visual and mechanical inspection: Connector pins, backplane edge connectors, and module housings are inspected for corrosion, mechanical damage, and counterfeit indicators.