The Omron CP1L-EM40DR-D, also cataloged as the CP1L-EM40DR-D CPU Unit, operates as a dedicated hardware component for discrete process control and deterministic fieldbus communication within Industrial Ethernet and Omron CP-series PLC networks.

Technical Identifier Matrix

• E (Expansion Capability): Embedded 10/100Base-TX Ethernet port
• M (Program Capacity): 10K steps user memory capacity
• 40 (Built-In I/O Points): 40 total discrete I/O points (24 Inputs, 16 Outputs)
• R (Output Classification): Electromechanical relay outputs
• D (Power Supply): 24 VDC external power supply input

Hardware Specifications

Ethernet Determinism and Backplane Bus Velocity

The embedded Ethernet subsystem of the CP1L-EM40DR-D integrates socket services and FINS/UDP host communications directly onto the CPU processing board. By executing cyclic scan tasks independently from serial port polling, backplane bus velocity maintains a consistent scan cycle time down to 0.55 us for basic instruction processing.

I/O density scales seamlessly via the lateral expansion interface, connecting up to 3 expansion I/O units while maintaining strict memory map alignment across CIO and Work bit areas. Hardware interrupt processing bypasses normal scan execution, allowing the 4-axis 100 kHz high-speed counter registers to update deterministically without delaying Ethernet packet processing or backplane refreshed data.

Package Contents & Ordering Information

• 1x Omron CP1L-EM40DR-D Programmable Controller Unit
• 1x Removable Screw Terminal Block Assembly
• 1x Lithium Battery Unit
• 1x Installation Instruction Sheet

Field Installation Guidelines

• DIN-Rail Mounting: Secure the module onto a standard 35 mm DIN rail (PFP-50N/PFP-100N). Maintain at least 50 mm clearance above and below the unit for natural heat convection.
• 24 VDC Power Wiring: Wire external 24 VDC supply power using stranded copper wiring (0.5 to 1.25 mm sq). Ensure proper polarity before energizing terminal blocks.
• Ethernet Cabling: Connect shielded Category 5 or higher twisted-pair cable (STP) using RJ45 connectors. Maintain a maximum segment length of 100 m.
• Shielding & Grounding: Connect the protective earth (PE) terminal to a ground resistance of less than 100 ohms. Use 360-deg braid grounding techniques for all shielded I/O lines.
• Terminal Block Tightening: Torque terminal screws to 0.5 N-m (4.4 in-lbs) to avoid stripped threads while maintaining optimal contact resistance.

Frequently Asked Questions

• What power supply voltage is required for the CP1L-EM40DR-D?

  The CP1L-EM40DR-D requires a nominal external supply voltage of 24 VDC.

• How many total I/O points are built into the main controller base?

  The CPU base unit incorporates 40 physical I/O points, comprising 24 inputs and 16 outputs.

• What is the maximum frequency of the high-speed counter inputs?

  The unit features 4 axes of high-speed counter inputs rated for signals up to 100 kHz.

• Does this model support pulse outputs for motion control?

  No, high-speed pulse outputs are supported exclusively on CP1L models equipped with transistor outputs.

• How many expansion units can be added to the backplane?

  A maximum of 3 CP-series expansion or expansion I/O units can be attached laterally.

• What is the default communication interface on the CP1L-EM series?

  The CP1L-EM series features an integrated 10/100Base-TX RJ45 Ethernet port for networking.

• What is the minimal execution time for standard basic instructions?

  Basic program instructions execute in a minimum processing time of 0.55 us.

• How should cable shielding be grounded to mitigate electromagnetic interference?

  All signal cable shields must be grounded at the controller side using a 360-deg braid clamp connected to PE.