The Omron CPM1A-40CDR-A-V1, also cataloged as the CPM1A-40CDR Programmable Controller, operates as a dedicated hardware component for discrete logic control and high-speed encoder signal processing within SYSMAC CPM1A automation architectures.

Part Number Breakdown & Configuration Matrix

• CPM1A: Compact micro PLC central processing unit series
• 40: 40 total integrated I/O points (24 inputs, 16 outputs)
• C: CPU unit main assembly with internal power supply
• D: DC input power voltage specification
• R: Relay contact discrete output stage
• A: AC power supply operational rating (100 to 240 VAC)
• V1: Enhanced version with expanded instruction execution features

Technical Hardware Parameters

PLC Execution Dynamics & Firmware Interfacing

The central processing unit maintains predictable execution timing across local discrete channels. Stable backplane bus communication velocity Licences enable continuous data exchange during I/O density scaling via expansion blocks. Built-in firmware flash compatibility preserves non-volatile program memory and configuration parameters, preventing data degradation across Profinet / EtherNet/IP deterministic networks host interfaces.

Shipping Package Content List

• 1 x CPM1A-40CDR-A-V1 CPU Unit Base Assembly
• 1 x Terminal Block Protective Cover Plate
• 1 x Hardware Operation Leaflet

Mounting Sequence & Wiring Architecture

Mechanical Installation

• Mount the CPU frame vertically on a standard 35 mm DIN rail or attach directly to a metal backplate using two M4 screws.
• Maintain at least 50 mm clearance above and below the housing to allow proper heat dissipation.

Field Wiring Execution

• Connect AC main power (100 to 240 VAC) to the L1 and L2/N terminals; torque barrier screws to 0.5 N m.
• Route low-voltage 24 VDC sensor input wiring away from AC output load lines to minimize electromagnetic noise coupling.

Frequently Asked Questions

• What is the total I/O point allocation built into this CPU model?

  The unit incorporates 24 discrete DC inputs and 16 electromechanical relay outputs for a total of 40 local points.

• How many expansion I/O modules can be attached to the CPU base?

  The base CPU supports direct physical bus connection of up to 3 expansion units to increase I/O density.

• What high-speed pulse input capability does the unit provide?

  The CPU includes one high-speed encoder input channel supporting single-phase pulse counting up to 5 kHz.

• What memory sizes are allocated for program code and data retention?

  Internal system memory provides 2 kWords of user program capacity and 1 kWords of user data memory space.

• What is the logic instruction execution speed range for ladder logic?

  Basic ladder logic instructions execute within an execution time window of 0.72 us to 1.72 us.

• Does the CPU require an external DC power supply for operating power?

  No, the unit features an integral power supply operating directly off 100 to 240 VAC main power line inputs.

• Can the relay output contacts switch both AC and DC load circuits?

  The output contacts are potential-free relays capable of switching either AC or DC external load circuits.

• Are terminal connections accessible for maintenance without removing the CPU?

  Removable screw terminal blocks allow field wiring isolation without demounting the main chassis frame.