The Omron CP1E-N40DT-A, also cataloged as the CP1E CPU Unit Hardware, operates as a dedicated hardware component for discrete sequencing and transistor output control within CP1E PLC systems.

Part Number Nomenclature Breakdown

• CP1E: Base product series designation for compact PLCs.

• N: Application CPU model type with enhanced processing and communication option support.

• 40: Total I/O capacity (24 DC inputs, 16 transistor outputs).

• D: DC input configuration (24 VDC inputs).

• T: Transistor outputs, sinking type.

• A: AC power supply operating voltage requirement.

Physical & Electrical Performance

Deterministic Bus & Communications Integration

The unit provides high-speed execution capabilities with optimized firmware flash compatibility across standard CP1E expansion units. Communication routines leverage built-in USB ports along with optional RS-232C or RS-485 serial boards, ensuring low-latency backplane bus communication velocity and stable I/O density scaling during execution cycles.

Package & Ordering Information

• 1 x Omron CP1E-N40DT-A CPU Unit

• 1 x Terminal Block Protective Cover Set

• 1 x Hardware Instruction Sheet

Mounting & Wiring Specifications

• DIN-Rail Mounting: Secure the controller on a 35 mm DIN rail using the rear locking tabs. Maintain a minimum 20 mm clearance above and below the unit for convection cooling.

• Power Supply Wiring: Connect 100 to 240 VAC power to terminals L1 and L2/N. Ensure protective earth (PE) is grounded using a wire of at least 1.25 mm sq to limit electrical noise.

• Signal Line Isolation: Keep 24 VDC input and transistor output wiring physically segregated from high-voltage AC mains lines to avoid electromagnetic induction.

Technical Support FAQ

• What is the default output state when the CPU transitions to PROGRAM mode?

  Transistor outputs switch immediately to the OFF state when the CPU changes operating mode from RUN/MONITOR to PROGRAM.

• Does the CP1E-N40DT-A support online program editing?

  Yes, online editing is supported over the integrated USB peripheral port while the controller is running in MONITOR mode.

• How are sinking transistor outputs wired to an external load?

  Sinking transistor outputs connect the load to ground (0 VDC). Connect the positive load terminal to the positive power supply rail.

• Can the integrated terminal blocks be detached during replacement?

  The main terminal blocks on the CP1E-N40DT-A are fixed directly to the housing and cannot be unplugged or hot-swapped.

• What battery unit is used to retain internal clock data?

  The optional battery CP1W-BAT01 provides backup power for internal clock operation and data memory retention.

• What is the maximum operating input voltage limit for the DC inputs?

  The discrete DC input terminals accept a nominal 24 VDC signal, with an absolute maximum rating of 26.4 VDC continuous.

• How is shield grounding terminated on serial communication option boards?

  Connect the cable shield wire to a single ground point at the controller end using a low-impedance ground bar.

• What indicator displays a hardware or program execution fault?

  The front-panel ERR/ALM LED lights or flashes red when an operational error or system fault is detected.