OMRON CJ1G Series Modules CJ1G-CPU43H

Name: OMRON CJ1G Series Modules CJ1G-CPU43H
Brand: Omron

Model: CJ1G-CPU43H

Brand Omron

Series CJ1G Series

Model CJ1G-CPU43H

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Product Details And Specifications

OMRON CJ1G Series Technical Notes

The OMRON CJ1G Series is a mid-range programmable logic controller (PLC) platform within OMRON's CJ-series architecture, deployed extensively across global heavy industry sectors including petrochemical plants, nuclear facility auxiliary systems, oil refineries, pharmaceutical manufacturing, and automotive assembly lines. The CJ1G platform occupies the mid-tier of the CJ-series hierarchy — above the CJ1M (compact) and below the CJ1H (high-performance) — making it the standard-specification workhorse for process control applications requiring reliable multi-rack expansion, deterministic scan times, and broad I/O compatibility. Its modular backplane architecture supports up to 10 expansion units per CPU rack, with a maximum of 40 I/O units per system configuration. The CJ1G series is fully compatible with OMRON's SYSMAC Studio and CX-Programmer development environments, and integrates natively with OMRON's DeviceNet, EtherNet/IP, and Controller Link network layers.

The Evolution of CJ1G Architecture

The CJ-series was introduced by OMRON in the early 2000s as a successor to the CS1-series, adopting a slimmer form factor with a tool-less unit mounting mechanism. The CJ1G designation identifies the mid-performance CPU tier within this family. Early CJ1G units (CJ1G-CPU42H, CJ1G-CPU43H, CJ1G-CPU44H, CJ1G-CPU45H) shipped with program capacities ranging from 10K to 60K steps and data memory from 32K to 192K words. The suffix H denotes the enhanced hardware revision, which introduced faster instruction execution, expanded EM (Extended Memory) banks, and improved pulse output capabilities compared to the original non-H variants.

As the platform matured, OMRON introduced firmware updates to support structured text (ST) and function block diagram (FBD) programming in addition to ladder diagram (LD) and instruction list (IL). The CJ1G series reached its commercial maturity phase approximately 2010–2015 and has since entered a sustained maintenance lifecycle. OMRON continues to supply spare units and replacement modules, but new system designs are directed toward the NX/NJ-series platform. For installed-base operators, the CJ1G remains a fully supportable platform with a broad ecosystem of compatible I/O, communication, and special function modules.

CJ1G Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked modules within the OMRON CJ1G ecosystem. Each entry is classified by functional category.

CPU Modules

CJ1G-CPU42H: Mid-range CPU, 10K steps program, 32K words DM, 3 EM banks
CJ1G-CPU43H: Mid-range CPU, 20K steps program, 64K words DM, 7 EM banks
CJ1G-CPU44H: Mid-range CPU, 30K steps program, 128K words DM, 13 EM banks
CJ1G-CPU45H: Mid-range CPU, 60K steps program, 192K words DM, 25 EM banks

Digital Input Modules (DI)

CJ1W-ID211: 16-point DC input, 24 VDC, NPN/PNP selectable
CJ1W-ID231: 32-point DC input, 24 VDC, NPN
CJ1W-ID261: 64-point DC input, 24 VDC, NPN, high-density
CJ1W-IA201: 16-point AC input, 100–120 VAC

Digital Output Modules (DO)

CJ1W-OD211: 16-point transistor output, NPN, 0.5 A/point
CJ1W-OD231: 32-point transistor output, NPN, 0.1 A/point
CJ1W-OD261: 64-point transistor output, NPN, high-density
CJ1W-OA201: 8-point triac output, 250 VAC, 1 A/point

Analog I/O Modules (AI/AO)

CJ1W-AD081-V1: 8-channel analog input, 1–5 V / 4–20 mA, 12-bit resolution
CJ1W-DA041: 4-channel analog output, 1–5 V / 4–20 mA, 12-bit resolution
CJ1W-MAD42: 4-ch analog input + 2-ch analog output combo module

Communication & Network Modules

CJ1W-ETN21: EtherNet/IP unit, 100BASE-TX, FINS/UDP messaging
CJ1W-DRM21: DeviceNet master/slave unit, up to 63 nodes
CJ1W-CLK21-V1: Controller Link unit, optical/electrical, peer-to-peer data link
CJ1W-SCU21-V1: Serial communications unit, 2-port RS-232C/RS-422A

Power Supply Modules

CJ1W-PA205R: AC power supply, 100–240 VAC input, 5 VDC/5 A output, with RUN output
CJ1W-PD025: DC power supply, 24 VDC input, 5 VDC/2.8 A output

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