The Omron CP1E-N40SDR-A, also cataloged as the CP1E-N40 CPU Unit, operates as a dedicated hardware component for direct digital switching, sequential logic execution, and local loop control within Omron CP1E automation networks.

Model Nomenclature & Designation Structure

The catalog number elements dictate the physical hardware features and electrical ratings:

• CP1E: Compact PLC platform family designation.

• N: Application model series featuring expanded memory and built-in RS-232 communication interfaces.

• 40: Total system I/O point capacity (24 discrete DC inputs and 16 electromechanical relay outputs).

• S: Renewal series hardware iteration with optimized physical layout.

• D: Standard DC input circuitry.

• R: Electromechanical relay output contacts.

• A: Integrated 100 to 240 VAC main power supply unit.

Mechanical & Electrical Technical Specifications

Backplane Architecture & Firmware Compatibility

The CP1E CPU uses high-efficiency internal bus pipelines to ensure fast scan times and predictable instruction cycle speeds. Firmware flash compatibility enables consistent user code execution across the CPU architecture, while dynamic I/O density scaling allows seamless integration of additional CP1W expansion units onto the main logic controller rack.

Standard Equipment Delivery

• 1 x Omron CP1E-N40SDR-A CPU Unit

• 1 x Terminal block protective cover

• 1 x Operating manual guide

Cabinet Assembly & Electrical Installation

• Power Mains Wiring: Connect line voltage (100 to 240 VAC) strictly to the designated AC power input terminals; verify isolation from internal DC field sensor lines.

• DIN-Rail Securement: Mount the unit vertically onto standard 35 mm DIN rails, ensuring upper and lower retention clips click firmly into place.

• Auxiliary DC Output Usage: Do not exceed the maximum 0.30 A rating on the built-in 24 VDC service power supply when powering external field sensors.

• Earthing Protocol: Run a short, low-impedance copper wire from the functional ground terminal directly to the central panel earth bar.

Frequently Asked Questions

• What supply voltage range is accepted by the CP1E-N40SDR-A CPU?

  The unit accepts a wide nominal AC supply input from 100 to 240 VAC at 50/60 Hz.

• What is the current capacity of the auxiliary 24 VDC service supply?

  The built-in auxiliary service output provides up to 0.30 A at 24 VDC for direct sensor excitation.

• How many user program steps and data words are available?

  The internal flash memory supports up to 8K ladder logic program steps and 8K data memory words.

• What output contact type is integrated into this controller base?

  The output section features 16 discrete electromechanical relay outputs for switching AC or DC field loads.

• Can CP1W expansion units be hot-swapped while powered?

  No, the CPU power supply must be completely de-energized before connecting or removing expansion modules.

• Does the CPU unit include an onboard RS-485 communication port?

  No, the CP1E-N40SDR-A standard base unit does not include an onboard RS-485 port, but features standard RS-232/USB connectivity options.

• What is the recommended cabinet ground connection method?

  Connect the dedicated ground terminal on the CPU block directly to the panel earth bus using a short wire of at least 2 mm sq.

• How many field inputs are integrated into the base unit terminal block?

  The controller provides 24 discrete DC input channels configured for 24 VDC field switching signals.