The Omron CPM2A-40CDR-D, also cataloged as the CPM2A-40CDR-D Programmable Controller, operates as a dedicated hardware component for direct physical/electrical execution within CPM2A Series industrial automation networks. Operating on an incoming 24 VDC power supply rail, the unit monitors 24 discrete 24 VDC input channels and controls 16 electromechanical relay output contacts, running real-time logic programs while decoding high-speed encoder feedback signals.

Technical Identifier Matrix

Hardware Specifications

I/O Density Scaling and Backplane Bus Velocity

The Omron CPM2A-40CDR-D utilizes a central processing unit engineered for minimal instruction cycle latency, achieving basic ladder logic execution speeds between 0.26 us and 0.64 us. High backplane bus velocity allows continuous, low-jitter synchronization between physical input/output registers and internal program memory. To accommodate modular expansion, I/O density scaling enables up to 3 CPM1A expansion modules to connect directly to the right-side expansion bus port, increasing total discrete point density without compromising the sampling throughput of the built-in 20 kHz high-speed encoder input.

Package Contents & Ordering Information

• 1x Omron CPM2A-40CDR-D CPU Unit
• 1x Removable Terminal Block Cover Assembly
• 1x Hardware Installation Sheet

Field Installation Guidelines

• Mechanical Installation: Mount horizontally onto a standard 35 mm DIN rail or secure directly to a panel surface using M4 mounting screws. Maintain a minimum vertical clearance of 50 mm above and below the housing for adequate thermal airflow.
• DC Power Wiring: Connect a regulated 24 VDC power supply (20.4 to 26.4 VDC limit) to the dedicated DC supply terminals. Route DC power wiring separately from high-voltage AC conductors.
• Relay Output Wiring: Connect field loads to individual output relay terminals. Install flywheel diodes in parallel across DC inductive loads and RC arc suppressors across AC inductive loads to clamp back-EMF voltage transients and prevent contact burning.
• Grounding Protocols: Wire the functional earth ground terminal directly to the central cabinet ground bar using copper conductor with a minimum cross-sectional area of 2.0 mm sq.
• Signal Line Shielding: Route high-speed counter and encoder inputs using Shielded Twisted Pair (STP) cabling. Secure a 360-deg braid shield clamp to the panel earth ground bar.

Frequently Asked Questions

• Q: What is the main supply voltage requirement for the CPM2A-40CDR-D?

  A: The controller runs on a nominal input of 24 VDC, operating across a permissible voltage window of 20.4 to 26.4 VDC.

• Q: What are the continuous output contact ratings for the onboard relays?

  A: Output relay contacts are rated for a maximum current of 2 A per point at 250 VAC or 24 VDC.

• Q: How many built-in input and output points are available on this CPU model?

  A: The module integrates 40 total discrete points, configured as 24 inputs (24 VDC) and 16 electromechanical relay outputs.

• Q: What instruction execution speed does the internal processor achieve?

  A: The CPU processes basic ladder logic commands at execution speeds ranging from 0.26 us to 0.64 us per instruction block.

• Q: Does the base unit include high-speed counter capabilities?

  A: Yes, it incorporates 1 high-speed counter input channel rated up to 20 kHz single-phase or 5 kHz differential mode.

• Q: How many local expansion modules can be attached to the CPU base unit?

  A: Up to 3 CPM1A expansion I/O or special function modules can be connected via the side expansion port.

• Q: What are the exact physical dimensions of the CPM2A-40CDR-D housing?

  A: The module dimensions strictly measure 15.0 cm width by 9.0 cm height by 5.5 cm depth.

• Q: What non-volatile memory capacities are available for user applications?

  A: Integrated system memory provides 4 kWords of user program capacity and 2 kWords of data memory space.