The Omron CJ1M-CPU11, also cataloged as the CJ1MCPU11 CPU Unit, operates as a dedicated hardware component for centralized sequence logic execution and real-time process control within SYSMAC CJ1 Series PLC platforms.

Technical Identifier Matrix

• Base Hardware Model: CJ1MCPU11
• Full Order Code: CJ1M-CPU11
• Product Type: Programmable Logic Controller CPU Unit
• Series Architecture: Omron SYSMAC CJ1
• Max Local I/O Capacity: 160 Points
• Max Connectable Units: 10 Units (Single Rack Configuration)
• Expansion Subrack Support: Not Supported

Hardware Specifications

Omron Backplane Bus Velocity & Real-Time Logic Execution

The CJ1M-CPU11 controller interfaces directly with the high-speed SYSMAC CJ1 backplane bus, managing high-density I/O refresh cycles and specialized function units. The CPU pipeline executes basic LD instructions in 100 ns and complex MOV commands in 0.3 us, while maintaining a fixed system overhead time of 0.7 ms. Real-time tasks are managed using 256 subroutines and jumps, alongside 1 scheduled interrupt channel. Non-volatile project storage is sustained via CompactFlash cards, preserving program execution integrity without requiring constant backplane power.

Package Contents & Ordering Information

• 1x Omron CJ1M-CPU11 CPU Unit
• 1x End Cover (CJ1W-TER01)
• 1x Instruction documentation sheet

Field Installation Guidelines

• Backplane Slot Installation: Mount the CJ1M-CPU11 directly onto the DIN rail adjacent to the CJ1 power supply unit. Lock the CPU and adjacent expansion I/O modules together using the top and bottom slider locks.
• Bus Termination: Install the mandatory CJ1W-TER01 End Cover on the rightmost I/O unit to terminate the high-speed CJ1 backplane bus.
• Serial Interface Wiring: Connect host computers or operator interfaces to the RS-232C D-Sub 9-pin port using shielded twisted-pair serial cables wired with 360-deg braid shield clamping to the cabinet ground.
• Grounding & Shielding: Terminate the power supply module's functional earth (FE) terminal directly to a local copper busbar with a earth resistance under 100 Ohms.

Frequently Asked Questions

• Is hot-swapping supported for the CJ1M-CPU11 CPU unit or adjacent I/O modules?

  No. Rack power must be completely disconnected before removing or inserting the CPU or attached expansion modules to prevent backplane damage.

• What is the maximum number of I/O modules supported by the CJ1M-CPU11?

  The CPU unit supports a maximum of 10 I/O modules mounted on a single local rack assembly without expansion subracks.

• Does the CJ1M-CPU11 support Extended Data Memory (EM) banks?

  No. Memory structure is limited to 32 Kwords within the standard DM area; EM memory banks are not supported on the CPU11 hardware.

• What communication ports are available directly on the front panel of the CPU?

  The CPU unit includes one dedicated Omron peripheral port for programming tools and one standard RS-232C serial communication port.

• How is functional grounding established across the CJ1M CPU assembly?

  Grounding is provided through the internal backplane ground pins connected to the power supply unit's Functional Earth (FE) terminal.

• What type of external memory media is compatible with the CJ1M-CPU11?

  The CPU features a dedicated slot that accepts Omron-specified CompactFlash memory cards for program and data backup.

• What is the execution latency for standard ladder logic instructions on this module?

  Basic basic Boolean instructions like LD execute at 100 ns, while data transfer instructions like MOV execute at 0.3 us.

• What storage conditions are required for spare CJ1M-CPU11 units?

  Spare units should be stored in anti-static bags within ambient storage temperatures ranging from -20 to +75 deg C in non-condensing environments.