Omron CJ1M-CPU12 CJ Series PLC CPU Unit

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Manufacturer: Omron
Product No.: CJ1M-CPU12
Country of origin:Japan
Product Type: PLC CPU Modules
Payment: T/T, Western Union
Weight: 2000g
Shipping port: Xiamen
Warranty: 12 months

Description

Executing logical control in localized machinery setups, the Omron CJ1M-CPU12 CPU unit delivers high-speed, compact processing power for automated systems. This unit manages up to 320 local I/O points and coordinates up to 10 directly connected modules without the need for expansion racks. Engineered for precision and space-constrained enclosures, it features a logical instruction execution speed of 100 nanoseconds and integrates built-in serial and peripheral communications to streamline fieldbus networking and configuration.

Key Features

Direct Rack-Mounted Control: Supports up to 10 CJ-series expansion units directly on the CPU rack.
Dual Integrated Communication Ports: Features one dedicated peripheral port and one RS-232C port for simultaneous HMI, programming tool, or third-party serial interface connections.
Optimized Memory Configuration: Features 10 Ksteps of program capacity and 32 Kwords of DM (Data Memory) space.
Compact Flash Card Slot: Supports external memory card operations for backup data, logging, and parameter transfers.
Interrupt and Subroutine Capabilities: Handles up to 1024 subroutines/jumps and 2 scheduled interrupts for time-critical automation routines.

Applications

Packaging machinery control and sequencing
Small-scale material handling systems and conveyors
Auxiliary and secondary control cabinets in wastewater and automotive plants
Distributed machinery sub-assembly integration

Technical Specifications

Specification Parameter	Value / Rating
Manufacturer	Omron
Model Number	CJ1M-CPU12
Product Series	CJ-series CJ1M CPU Units
I/O Capacity	320 Points max.
Expansion Rack Support	Not Supported (Local CPU Rack ONLY)
Max. Connectable Units	10 Units
Program Capacity	10 Ksteps
Data Memory Capacity	32 Kwords (DM area only; no EM area)
LD Instruction Time	100 ns (0.1 us)
MOV Instruction Time	0.3 us
System Overhead Time	0.5 ms
Built-in Ports	1 Peripheral Port, 1 RS-232C Port
Subroutines / Jumps	1,024
Scheduled Interrupts	2
Option Card Support	CompactFlash Card (external slot)
Shipping Weight (Calculated)	2.0 kg (including commercial protective packaging)

Connections and Interfaces

Connector / Port	Functional Assignment / Configuration
Peripheral Port	Connects to CJ-series programming console or CS1W-CN226/CN626 cables for CX-Programmer connectivity.
RS-232C Port	9-pin D-sub interface used for Host Link (Sysmac Way), NT Link, No-protocol serial, or Modbus-RTU master/slave communications.
CF Card Slot	Accepts industrial CompactFlash memory cards for automated file transfers, program restoration, and system parameter logging.

Empirical Engineering Insights

Alternative Models & Compatibility

The CJ1M-CPU12 bridges the gap between the entry-level CJ1M-CPU11 (160 I/O) and the CJ1M-CPU13 (640 I/O). If upgrading from legacy CQM1 systems, note that the physical footprint, instruction address mappings, and communication cables are distinct. Additionally, unlike the larger CJ1M-CPU2x series, this processor lacks built-in pulse I/O or positioning outputs on the CPU board, meaning motion tasks require separate CJ1W-NC position control modules.

Application Pitfalls & Engineering Notes

Because this CPU does not support expansion racks, users are strictly capped at 10 slots on the main CPU rack. When configuring the system, perform a comprehensive current consumption analysis. High-density output modules combined with network units can exceed the current rating of the power supply unit. In such setups, upgrade the power supply to the CJ1W-PA202 (AC) or CJ1W-PD022 (DC) to prevent system drops or communications faults.

Commissioning & Wiring Tips

Verify the physical status of the hardware configuration DIP switches behind the front cover flap prior to commissioning. Switch 5 determines the communication protocol of the built-in RS-232C port. Setting Switch 5 to ON forces toolbus default programming protocols, ignoring settings defined in CX-Programmer's PLC Setup. Conversely, setting Switch 5 to OFF activates the customized serial parameters written to system memory.

Installation Guidelines

CRITICAL WARNING: Ensure all primary and auxiliary AC/DC supply voltages are completely de-energized before mounting, removing, or wiring modules. Failure to disconnect system power can cause terminal degradation, destroy internal memory components, and cause communication card damage.

1 DIN-Rail Mounting:

Hook the upper claw of the CJ1M-CPU12 unit onto the top of the DIN rail, then press the unit firmly downward until the bottom yellow locking track clip clicks into place.

2 Module Coupling:

Engage the integrated connectors on the sides of adjacent modules. Slide the yellow lock levers on both the top and bottom of the CJ1M unit forward until they click, locking the CPU and adjacent modules together.

3 Ground Connection:

Ensure the Functional Ground (FG) terminal on the adjacent power supply module is connected to a dedicated, low-impedance ground point (under 100 ohms) using AWG 14 or larger wire to minimize electrostatic interference.

Key Features:

#Omron CJ-Series #PLC CPU Modules

Can I expand the I/O capacity of the CJ1M-CPU12 beyond 320 points?

No. The CJ1M-CPU12 does not support expansion racks. The maximum physical capacity is strictly 320 local I/O points residing on a single local rack with up to 10 modules.

What is the function of DIP Switch 5 on the CJ1M-CPU12 faceplate?

DIP Switch 5 configures the RS-232C port. Setting it to ON forces default serial parameters (toolbus/host link) for programming tools. Setting it to OFF tells the CPU to use user settings written in the PLC Setup parameters.

Does this CPU unit support extra Extended Memory (EM) files?

No. The CJ1M-CPU12 contains 32 Kwords of Data Memory (DM area only). It does not support any Extended Memory (EM) banks.

Which programming software is required for the CJ1M-CPU12?

This module is fully configured, programmed, and diagnosed using CX-Programmer, which is part of Omron's CX-One automation software suite.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin

Omron CJ1M-CPU12 CJ Series PLC CPU Unit