Configured for high-speed logic processing and integrated motion input/output signals in SYSMAC CJ Series automation systems, the Omron CJ1M-CPU22 (CJ1M-CPU22 CPU Unit) provides direct physical/electrical execution. This processing unit incorporates integrated high-speed counter inputs and pulse outputs directly on the module base, driving localized execution without requiring auxiliary pulse or counter expansion modules.

Technical Identifier Matrix

Hardware Specifications

PLC Backplane Bus Velocity and Built-in I/O Execution

The CJ1M-CPU22 communicates over the internal SYSMAC CJ backplane bus using high-speed instruction access cycles. Basic LD instruction processing completes at 0.10 microseconds. The module's built-in digital hardware maps 10 general-purpose inputs and 6 outputs directly into the main CPU register map, reducing scan-time overhead compared to external rack-mounted I/O units. Furthermore, the 2 high-speed counter inputs and 2 pulse output channels operate asynchronously to standard cyclic ladder scanning, enabling direct hardware-level pulse positioning and encoder frequency measurement without introducing latency to backplane transfer tasks.

Package Contents & Ordering Information

• 1x Omron CJ1M-CPU22 CPU Unit
• 1x End Cover (CJ1W-TER01 required for backplane termination)
• 1x Quick Reference Manual Document

Field Installation Guidelines

• Mounting Configuration: Snap the CPU unit onto a standard 35 mm DIN rail adjacent to the dedicated CJ1 power supply module on the leftmost slot of the rack.
• Backplane Termination: Attach the CJ1W-TER01 End Cover to the rightmost I/O unit on the rack assembly. The CPU backplane bus requires this physical termination to establish circuit continuity.
• Wiring Practices: Use twisted-pair shielded cables for high-speed counter inputs and pulse outputs. Separate high-speed pulse line wiring from AC power lines by a minimum of 100 mm to avoid noise coupling.
• Grounding & Shielding: Connect the functional ground (FG) terminal on the adjacent power supply unit to a dedicated earth ground using a wire with a minimum gauge of 2.0 mm square. Ensure ground resistance remains below 100 ohms.

Frequently Asked Questions

• What is the total I/O capacity supported by the CJ1M-CPU22?

  The CPU supports up to 320 local I/O points mounted across a maximum of 10 units on the CPU rack.

• Does the CJ1M-CPU22 support expansion racks?

  No, the CJ1M-CPU22 does not support expansion racks. The hardware limit is 10 units connected directly on a single CPU rack.

• What built-in I/O functions are integrated into the CPU hardware?

  The unit includes 10 digital inputs, 6 digital outputs, 2 high-speed counter inputs, and 2 pulse outputs directly on the front panel terminal interface.

• What is the basic instruction execution speed of this processor?

  Standard basic instructions such as LD (Load) execute in 0.10 microseconds per instruction.

• What is the backplane current draw for the CJ1M-CPU22?

  The CPU module draws 0.64 A at 5 VDC directly from the internal CJ1 system backplane bus power supply module.

• How much memory is allocated for user programs and data retention?

  The processor provides 10K steps of user program capacity and 32K words of Data Memory (DM). Extended Memory (EM) is not available.

• Can I hot-swap units on the backplane while the CJ1M-CPU22 is operating?

  No, power to the CJ1 power supply module must be completely isolated and shut down prior to inserting or removing any units on the backplane.

• What end cover is required for backplane operation?

  The CJ1W-TER01 End Cover must be secured to the right end of the rack stack to properly terminate the internal backplane bus.