CJ1G-CPU42H PLC CPU, DIN rail, 64K words memory

Product Description

Omron’s CJ1G-CPU42H is a base CPU unit for CJ1-series PLC systems designed for industrial automation where modular expansion and DIN rail mounting are required. The CPU supports up to 30 modules across two racks, providing flexible I/O and function expansion while maintaining a compact footprint for panel installations. With 64K words of user memory, it accommodates substantial ladder logic programs and data areas for machine sequencing and process control. RS‑232C communication enables integration with host systems, HMIs, and peripheral devices; battery backup preserves data during power interruptions. The unit operates from 0°C to 55°C and includes ingress protection suitable for typical factory environments. Supplied as a single CPU module without a built-in display, it is configured and monitored using Omron engineering tools and can interface with external HMIs. The CJ1 platform’s reliability and lifecycle notes indicate the CJ1G-CPU42H is obsolete, but remains relevant for maintenance and retrofit of existing installations.

Key Features

• •CJ1-series modular CPU unit, DIN rail mounting for panels, 64K words program/data memory, Expansion up to 30 modules 2 racks, RS-232C communication interface, Battery backup for data retention, Operating temperature 0 to 55°C

Buy Options

Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.

Specifications

Series

CJ1

Model

CJ1G-CPU42H

Mounting

DIN rail

Memory size

64K words

Expansion capacity

Up to 30 modules, 2 racks max

Communication

RS-232C

Display

None

Operating temperature

0°C to 55°C

Ingress protection

Yes

Moisture sensitivity level

MSL 1 (Unlimited)

Part status

Obsolete

Packaging

Bulk

Manufacturer standard package

1

Weight

5 kg (11 lb)

HTSUS

8537.10.9160

ECCN

EAR99

Part #

CJ1G-CPU42H

Category

PLCs/Machine Control

Subcategory

PLC Module/Rack

Weight

0.37 lbs

FAQ