OMRON CPM2A-40CDR-A – Micro Programmable Controller | CPM2A Series Platform
Engineering Background
The OMRON CPM2A Series represents OMRON’s proven compact PLC platform, engineered for demanding industrial environments where reliability, compact footprint, and deterministic scan-cycle performance are non-negotiable. The CPM2A-40CDR-A is the 40 I/O relay-output variant, designed for machine-level control tasks requiring robust discrete signal handling and seamless integration with OMRON’s broader CS/CJ ecosystem via peripheral communications.
Product Positioning
Targeted at procurement engineers and system integrators sourcing a cost-effective, field-proven micro PLC for OEM machinery, conveyor systems, packaging lines, and building automation panels. The CPM2A-40CDR-A delivers industrial-grade reliability with a compact DIN-rail form factor, making it the preferred choice for retrofit and new-build control cabinets alike.
Complete Technical Specifications
| Model / SKU | CPM2A-40CDR-A |
| Brand / Manufacturer | OMRON Corporation |
| Series / Platform | CPM2A Series (Micro Programmable Controller) |
| Total I/O Points | 40 (24 Inputs / 16 Outputs) |
| Output Type | Relay (R) |
| Power Supply | 100–240 VAC, 50/60 Hz |
| Input Voltage | 24 VDC (internal supply available) |
| Relay Output Rating | 2 A at 250 VAC / 24 VDC (resistive load) |
| Program Memory | 4,096 words (ladder diagram) |
| Data Memory | 2,048 words (DM area) |
| Instruction Set | 185 instructions |
| Scan Time | 0.64 ms / 1,000 instructions (typical) |
| Communication Ports | 1 × RS-232C peripheral port; optional expansion RS-232C |
| Expansion Units | Up to 3 expansion I/O units (max 100 I/O total) |
| Analog Option | Supported via CPM2A-MAD expansion |
| High-Speed Counters | 4 channels, up to 20 kHz (single-phase) |
| Pulse Outputs | 2 channels, up to 10 kHz (transistor models only; relay model supports via expansion) |
| Operating Temperature | 0 to 55 °C |
| Storage Temperature | -20 to 75 °C |
| Humidity | 10 to 90% RH (non-condensing) |
| Protection Rating | IP20 (panel-mount) |
| Dimensions (W × H × D) | Approx. 250 × 90 × 75 mm |
| Weight | Approx. 800 g |
| Country of Origin | Japan |
| Certifications | CE, UL, cUL |
| Programming Software | CX-Programmer (CX-One Suite) |
| Communication Protocol | OMRON Host Link (C-mode / FINS) |
Proven Application Environments
- Packaging Machinery – Reliable relay outputs for solenoid valves, contactors, and motor starters in high-cycle packaging lines
- Conveyor & Material Handling – Deterministic scan cycle ensures precise sequencing of conveyor drives and diverters
- OEM Machine Control – Compact footprint and DIN-rail mounting suit tight control cabinet layouts
- Building Automation Panels – AC power supply and relay outputs align with HVAC and access control wiring standards
- Retrofit & Modernization Projects – Drop-in replacement for legacy CPM1A/CPM2A installations with full program compatibility
- Food & Beverage Processing – Robust relay isolation protects PLC logic from inductive load transients
Engineering Advantages
- Relay Output Isolation – Galvanic isolation between PLC logic and field devices eliminates ground-loop interference
- AC Power Supply – Direct 100–240 VAC input eliminates external 24 VDC PSU in many panel designs, reducing BOM cost
- Expandable Architecture – Up to 3 expansion units allow I/O scaling without replacing the CPU unit
- OMRON Host Link / FINS Protocol – Native integration with OMRON HMIs (NS/NB series), SCADA systems, and CX-Supervisor
- Battery-Backed Memory – Program and data retention during power loss; battery life typically 5 years
- Proven Field Reliability – CPM2A platform has 20+ years of global deployment across manufacturing sectors
- CX-Programmer Compatibility – Full support in current CX-One suite; existing ladder programs migrate without modification
System Architecture & Signal Flow
The CPM2A-40CDR-A operates as a standalone CPU unit with integrated 24-input / 16-output relay I/O. Signal flow: field sensors → 24 VDC input terminals (opto-isolated) → CPU scan cycle (ladder execution) → relay output contacts → field actuators (solenoids, motors, indicators). The RS-232C peripheral port connects to a PC running CX-Programmer for program upload/download and online monitoring. Expansion I/O units connect via the right-side expansion bus connector, extending the I/O map transparently within the same program address space. Optional analog expansion (CPM2A-MAD) maps to dedicated DM words for PID or setpoint control loops.
Sourcing & Quality Verification
- Authenticity – All units sourced through verified industrial distribution channels; original OMRON packaging and documentation
- Inspection – Each unit inspected for physical integrity, label authenticity, and firmware version prior to dispatch
- Traceability – Lot numbers and date codes recorded; available upon request for quality-critical procurement
- Warranty – 12-month warranty against manufacturing defects; DOA replacement within 7 business days
- Condition – New (factory-sealed) and tested surplus units available; condition clearly stated at order confirmation
Procurement Process
- Submit RFQ via konmask.com/pages/contact or email [email protected]
- Receive quotation with lead time, condition, and lot traceability within 24 business hours
- Confirm PO — we accept T/T bank transfer, PayPal, and major credit cards
- Unit ships with commercial invoice, packing list, and test report (if applicable)
- Track shipment via provided AWB; DDP/DAP Incoterms available for international orders
Technical FAQ
Q: Is CPM2A-40CDR-A compatible with CX-Programmer on Windows 10/11?
A: Yes. CX-Programmer v9.x (included in CX-One v4.x) fully supports CPM2A series on Windows 10 and 11 via USB-Serial adapter (CS1W-CIF31 recommended).
Q: Can I expand analog I/O on this relay-output model?
A: Yes. The CPM2A-MAD01 (2 analog inputs + 1 output) or CPM2A-MAD11 (2 inputs + 2 outputs) expansion units connect directly to the CPU expansion bus.
Q: What is the maximum program size?
A: 4,096 words of ladder program memory, supporting up to approximately 2,000 rungs depending on instruction complexity.
Q: Is the CPM2A-40CDR-A discontinued?
A: OMRON has transitioned to the CP1E/CP1L series for new designs, but CPM2A units remain available as spare parts and surplus stock. Konmask.com maintains verified inventory for MRO and retrofit procurement.
Q: What communication cable is required for programming?
A: Use OMRON CS1W-CIF31 (USB to RS-232C) or a standard RS-232C cable (9-pin female to mini-DIN 8-pin) for the peripheral port.
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