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Part of the Omron CJ-Series PLCs series — see the full model table, lifecycle status and replacement parts.

Omron CJ2M-CPU11 5K-step CPU Unit - front view showing the built-in RS-232C D-Sub 9-pin female serial port, the USB 2.0 mini-B programming port, the option-board slot with cover, and the rotating battery-compartment cover on the bottom-right

Omron CJ2M-CPU11 — 5K Steps CPU, RS 232C, No EtherNet/IP

SKU: CJ2M-CPU11

USD 112.00

CJ2M-series 5K-step CPU Unit with built-in RS-232C and USB programming port. 64K words data memory, 2,560 I/O max, 3 expansion racks

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Product Overview

The Omron CJ2M-CPU11 is Omron's entry-level CJ2M CPU Unit — 5K steps of program memory, 64K words of data memory, and built-in RS-232C + USB programming ports — designed for compact machines where EtherNet/IP is not required. manufactured by Omron Corporation. Hengyixin Automation stocks this controller in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.

It is the smallest of the ten CJ2M CPU variants and the value-tier pick when the engineer is building a CJ-series rack with CJ1W expansion I/O (CJ1W-ID211, CJ1W-OD212, CJ1W-MAD42, CJ1W-NC233) and only needs serial Host Link for programming and HMI/SCADA networking. The CPU1x variant (no EtherNet/IP) saves roughly $300-500 over the equivalent CPU3x (with EtherNet/IP) — for applications where the network is Modbus RTU, Host Link, or a CJ1W-ETN21 Ethernet unit, the CPU11 is the right pick.

The Pulse I/O Module is the right pick for stepper-driven indexing tables, encoder-based cut-to-length, or registration-mark tracking on packaging lines.

Key Features

  • LD instruction execution time 0.04 us
  • Floating point trigonometric operations under 1 us
  • Built-in RS-232C serial port
  • 5K steps of program memory
  • SKU: CJ2M-CPU11
  • Series: CJ2M CPU Units (CJ-series modular PLC platform)
  • I/O: 2 I/O

Best-Fit Applications

  • Batching system controller - CPU11 + CJ1W-MAD42 for flow-meter inputs and control-valve outputs; RS-232C to a weigh-scale indicator
  • Small packaging machine - CPU11 with CJ1W-ID211 + CJ1W-OD212 + CJ1W-OC211 + CJ1W-MAD42 for valve control, sensor aggregation, and analog.
  • Small assembly cell - CPU11 + CJ2M-MD211 Pulse I/O Module for 4-axis stepper control of pick-and-place gantry + CJ1W-ID211/OD212 for.

Buying Checklist

  • Pick CJ2M-CPU14 for 30K-step no-EIP - larger programs
  • Pick CJ2M-CPU12 for 10K-step no-EIP - slightly larger programs
  • Pick CJ2M-CPU13 for 20K-step no-EIP - medium programs without EtherNet/IP

Technical Specifications

Model CJ2M-CPU11
Series CJ2M CPU Units (CJ-series modular PLC platform)
Type 5K-step CPU Unit without built-in EtherNet/IP
Program Capacity 5K steps (5,120 steps)
Data Memory Capacity 64K words (DM: 32K words, EM: 32K words x 1 bank)
LD Instruction Execution Time 0.04 us (40 ns)
I/O Bits 2,560 bits max
Mountable Units 40 CJ1W units max per CPU (CPU rack + 3 expansion racks)
Built-in Communication Ports RS-232C (D-Sub 9-pin female) + USB 2.0 mini-B (programming)
Pulse Output (via Pulse I/O Module) 4 outputs at 100 kHz pulse train + PWM (per module)
Interrupt Inputs (via Pulse I/O Module) 4 inputs (per module)
Current Consumption (5 VDC) 0.5 A from CJ bus (CPU1x)
Current Consumption (24 VDC) 0 A (no external 24 V required)
Communication Protocols (RS-232C) Host Link, 1:N NT Link, No-protocol, Serial PLC Link Slave/Master, Serial Gateway (CompoWay/F), Tool Bus
Dimensions (W x H x D) 60 × 90 × 65 mm (CPU unit only)

FAQ for CJ2M-CPU11

What's the difference between CJ2M-CPU11 and CJ2M-CPU31?
Both are CJ2M CPUs with the same 5K-step program capacity, same 64K-word data memory, same LD execution time (0.04 us), and same RS-232C + USB + option board + Pulse I/O Module support. The only difference is the built-in EtherNet/IP port: CJ2M-CPU31 (this SKU's EIP sibling) has a 2-port EtherNet/IP switch on the front face supporting tag-data-link communication to NJ-series controllers, EtherNet/IP scanners, and remote I/O; CJ2M-CPU11 (this SKU) has no built-in EtherNet/IP.
Can the CJ2M-CPU11 communicate with NJ-series controllers over EtherNet/IP?
The CJ2M-CPU11 cannot be an EtherNet/IP scanner or adapter directly - it has no built-in EtherNet/IP port and the CP1W-ME05M option board only supports FINS/Host Link communication over Ethernet (not EtherNet/IP CIP routing). For EtherNet/IP communication with NJ-series controllers, use a CJ2M-CPU3@ (CPU31, CPU32, CPU33, CPU34, CPU35) which has the built-in EtherNet/IP port and supports tag-data-link (cyclic) communication plus explicit (message) communication.
Can I add a Pulse I/O Module to the CJ2M-CPU11 for positioning?
Yes - the CJ2M-CPU11 supports up to 2 CJ2M-MD211 (NPN open-collector) or CJ2M-MD212 (PNP) Pulse I/O Modules mounted on the left side of the CPU. Each module provides 4 high-speed counter inputs (100 kHz line-driver or 50 kHz open-collector), 4 interrupt inputs, and 4 pulse outputs (100 kHz pulse train + PWM). With 2 modules, the CPU11 can do 4-axis positioning at 100 kHz for stepper-driven indexing tables, encoder-based cut-to-length, or registration-mark tracking.
What option board fits in the CJ2M-CPU11 option slot?
The CJ2M-CPU11 option slot accepts 4 types of CP1W option boards: (a) CP1W-CIF01 RS-232C Option Board - adds a second RS-232C port with the same D-Sub 9-pin connector as the built-in port (15 m max cable). Adds 5 mA at 5 V. (b) CP1W-CIF11 RS-422A/485 Option Board (non-isolated) - adds an RS-422A or RS-485 port on a 5-terminal screw block (50 m max cable). Adds 30 mA at 5 V.

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