OMRON CPM2C-32EDTM – 32-Point Mixed DC I/O Expansion Unit | CPM2C Series PLC Platform
Engineering Background: The CPM2C series represents OMRON’s compact, high-density PLC platform engineered for space-constrained machine automation. Designed to slot directly into CPM2C CPU expansion buses, the CPM2C-32EDTM delivers 32 additional I/O points—16 DC inputs and 16 transistor (NPN sink) outputs—without requiring an external power supply module, dramatically simplifying panel wiring and reducing BOM complexity.
Product Positioning: This expansion unit is the preferred choice for OEM machine builders and system integrators who need to scale CPM2C-based control architectures beyond the CPU’s native I/O count. Its compact DIN-rail form factor and direct-connect bus interface make it ideal for retrofits, capacity expansions, and new machine designs where panel real estate is at a premium.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | CPM2C-32EDTM |
| Manufacturer | OMRON Corporation |
| Series / Platform | CPM2C PLC Expansion Series |
| Module Type | I/O Expansion Unit (Mixed DC) |
| Total I/O Points | 32 (16 Inputs + 16 Outputs) |
| Input Type | DC Input (NPN/PNP selectable) |
| Output Type | Transistor Output (NPN Sink) |
| Input Voltage | 24 VDC |
| Input Current | 7 mA typical per point |
| Output Voltage Range | 4.75–26.4 VDC |
| Output Current (per point) | 0.3 A max |
| Output Current (total) | 0.9 A max per common |
| ON Response Time | 1.5 ms max |
| OFF Response Time | 1.5 ms max |
| Isolation Method | Photocoupler |
| Power Consumption | Supplied via CPM2C expansion bus |
| Connector Type | Direct expansion bus connector (CPM2C compatible) |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -20°C to 75°C |
| Humidity | 10% to 90% RH (non-condensing) |
| Vibration Resistance | 10–57 Hz, 0.075 mm amplitude; 57–150 Hz, 9.8 m/s² |
| Shock Resistance | 147 m/s², 3 times each in X/Y/Z axes |
| Degree of Protection | IP20 |
| Mounting | DIN Rail (35 mm) or direct panel mount |
| Dimensions (W×H×D) | Approx. 62 × 90 × 33 mm |
| Weight | Approx. 100 g |
| Country of Origin | Japan |
| Certifications | CE, UL, cUL |
| Compatible CPUs | CPM2C-10C□DT□-D, CPM2C-20C□DT□-D and all CPM2C CPU variants |
| Max Expansion Units | Up to 3 expansion units per CPM2C CPU |
Proven Application Environments
- Packaging Machinery: Conveyor indexing, reject gate control, and sensor feedback loops requiring dense I/O in compact enclosures.
- Semiconductor & Electronics Assembly: Pick-and-place machines, test fixtures, and handler systems where transistor output speed and photocoupler isolation are critical.
- Food & Beverage Processing: Filling, capping, and labeling lines operating in humid environments (IP20 panel-mounted).
- Textile & Printing Equipment: Multi-axis tension control and registration mark detection with high-speed I/O response.
- HVAC & Building Automation: Fan coil unit control, damper positioning, and alarm annunciation panels.
- Retrofit & Modernization Projects: Expanding legacy CPM2C installations without CPU replacement, preserving existing ladder logic investments.
Engineering Advantages
- Bus-Powered Architecture: No separate 24 VDC supply required for the module itself—power is drawn directly from the CPM2C expansion bus, reducing wiring complexity and potential failure points.
- High-Density I/O in Minimal Footprint: 32 I/O points in a ~62 mm wide module; ideal for panels where every millimeter counts.
- Photocoupler Isolation on All Channels: Provides robust noise immunity in environments with VFDs, servo drives, and high-current switching loads.
- Fast Transistor Switching: 1.5 ms ON/OFF response supports high-speed pulse applications and rapid machine cycle times.
- Plug-and-Play Expansion: Direct bus connector eliminates ribbon cables and intermediate terminal blocks, reducing assembly time and connection resistance.
- Wide Operating Temperature Range: 0–55°C continuous operation suits both climate-controlled and industrial floor environments.
System Architecture & Signal Flow
The CPM2C-32EDTM connects directly to the right-side expansion port of any CPM2C CPU unit via the integrated bus connector. The CPU allocates a fixed I/O word block to the expansion unit automatically upon power-up—no DIP switch addressing or software configuration is required. Input signals (field sensors, proximity switches, push buttons) are wired to the 16 input terminals; output signals drive solenoids, indicator lamps, relay coils, or servo enable lines through the 16 NPN transistor output channels. All channels are photocoupler-isolated from the internal logic bus, ensuring that field-side transients do not propagate to the CPU backplane.
Sourcing & Quality Verification
- OEM Authenticity: All units sourced through verified OMRON authorized distribution channels or directly from OMRON-certified regional warehouses.
- Pre-Shipment Inspection: Each unit undergoes visual inspection, label verification (date code, lot number, country of origin), and functional continuity check before dispatch.
- Traceability: Lot numbers and date codes are recorded and available upon request for quality audit purposes.
- Packaging Integrity: Units ship in original OMRON anti-static packaging with desiccant where applicable.
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 business days.
Procurement Process
- Confirm Compatibility: Verify your CPM2C CPU model and current expansion unit count (max 3 per CPU).
- Request a Quote: Contact us at support@konmask.com or via the product page for volume pricing and lead time confirmation.
- Order Placement: Purchase directly through Konmask.com with secure checkout. HKD, USD, and major currencies accepted.
- Shipping: DHL Express / FedEx International Priority standard. EXW Shenzhen available for freight forwarder arrangements.
- Documentation: Commercial invoice, packing list, and certificate of origin provided with every shipment. FORM E (ASEAN) available on request.
Technical FAQ
Q: Can the CPM2C-32EDTM be used with CPM1A or CQM1H CPUs?
A: No. The CPM2C-32EDTM uses the CPM2C-specific compact bus connector and is not mechanically or electrically compatible with CPM1A or CQM1H expansion buses.
Q: How many CPM2C-32EDTM units can be connected to one CPU?
A: Up to 3 expansion units (of any CPM2C expansion type) can be connected in series to a single CPM2C CPU, providing up to 96 additional I/O points.
Q: Is the output NPN or PNP?
A: The CPM2C-32EDTM outputs are NPN (sink) transistor type. For PNP (source) output requirements, refer to the CPM2C-32EDTC model.
Q: Does this unit require a separate 24 VDC supply?
A: No. The module draws its operating power from the CPM2C expansion bus. However, the output load circuit requires an external 24 VDC supply connected to the output common terminals.
Q: What is the I/O word allocation for this module?
A: The CPM2C CPU automatically allocates one input word and one output word to each expansion unit based on its position in the expansion chain. No manual address setting is required.
Q: Are spare units available for long-term machine support?
A: Yes. Konmask.com maintains stock for lifecycle support. Contact us for multi-unit blanket orders and consignment stocking arrangements.
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