Description
Providing reliable logic execution for localized machinery, the Omron CPM1A-40CDT1-A-V1 serves as a self-contained controller within the legacy SYSMAC micro-PLC family. This unit integrates 24 DC inputs and 16 PNP transistor outputs directly onto a single chassis, eliminating the need for separate I/O backplanes in basic automation architectures. Running on a wide-range 100 to 240 VAC power supply, it supports up to three expansion units to scale functional capacity as system demands grow. With onboard high-speed counters and pulse outputs, this controller executes specialized control tasks with deterministic performance.
Features
- Integrated high-speed counter input (5 kHz) for single-phase rotary encoder feedback.
- Built-in pulse output (2 kHz) for basic step-and-direction positioning and motion control.
- Solid-state source (PNP) transistor outputs for high-frequency switching and long operational life.
- Dual analog trim pots on the front panel for real-time manual setpoint adjustments.
- Peripheral port support for direct connection to programming consoles or host link interfaces.
Applications
- Packaging machinery and conveyor system sorting.
- Local pump control and water treatment system sequencing.
- Material handling and small-scale gantry positioning.
- Dedicated HVAC damper and environmental chamber control.
Technical Specifications
| Parameter |
Specification Value |
| Manufacturer |
Omron |
| Model Series |
SYSMAC CPM1A |
| Total Onboard I/O |
40 points (24 inputs, 16 outputs) |
| Input Specifications |
24 VDC (Inputs 00000 to 00011 are high-speed compatible) |
| Output Type |
Transistor (Source / PNP type) |
| Supply Voltage |
100 to 240 VAC, 50/60 Hz |
| Operating Voltage Range |
85 to 264 VAC |
| Program Capacity |
2,000 words (2 kWords) |
| Data Memory Capacity |
1,000 words (1 kWords DM) |
| Logic Execution Speed |
0.72 us to 1.72 us (Basic instructions) |
| Expansion Capability |
Up to 3 expansion modules (I/O, analog, or temperature control) |
| Ambient Operating Temperature |
0 to 55 Celsius |
| Dimensions (H x W x D) |
90 mm x 150 mm x 70 mm |
| Country of Origin |
Japan |
| Shipping Weight (Calculated) |
0.95 kg |
| Package Dimensions (Calculated) |
185 mm x 125 mm x 110 mm |
Connections and Interfaces
| Terminal Class |
Pin Allocation / Function |
| AC Power Supply |
L1 and L2/N terminals for 100 to 240 VAC incoming power |
| Grounding |
Functional Ground (FR) and Protective Earth (GR) terminals |
| Sensor Power Output |
24 VDC output (up to 300 mA) for biasing field sensors |
| Input Terminals |
24 input channels grouped with common (COM) points; supports NPN/PNP field configurations |
| Output Terminals |
16 PNP transistor source outputs routed through external load supply commons |
Empirical Engineering Insights
Alternative Models & Compatibility
The CPM1A series is legacy hardware. For modern system updates, migrating to the Omron CP1E-N40S1DT1-D or CP2E-N40DT1-D is highly recommended. These modern alternatives support standard USB or Ethernet communication, saving you from locating legacy serial links. Note that memory structures differ; CX-Programmer must be used to perform project conversion and address re-mapping when replacing CPM1A units with newer CP-series hardware.
Application Pitfalls & Engineering Notes
Since this CPU utilizes transistor (source) outputs, the maximum current per output channel is 0.3 A. Driving highly inductive DC loads directly (such as large solenoids or high-current contactor coils) will cause thermal breakdown of the internal output transistors. External freewheeling flyback diodes must be wired in parallel with inductive loads to suppress inductive voltage kickback during de-energization.
Commissioning & Wiring Tips
When programming the CPM1A, a dedicated peripheral port interface converter (such as CPM1-CIF01 for RS-232C or CS1W-CIF31 for USB) is required to establish communication with CX-Programmer software. In high-noise environments, ensure that the functional ground terminal is connected to a dedicated ground path with less than 100 Ohms resistance to prevent communication dropouts and logic disturbance.
Installation Guidelines
CRITICAL WARNING
Always isolate the AC power supply before attempting installation, wiring, or maintenance on the terminal blocks. Applying AC voltage to the DC input terminals, the internal 24 VDC auxiliary power supply terminals, or the transistor outputs will result in immediate module destruction and safety hazards.
1
Mount the PLC unit on a standard 35 mm DIN rail or utilize the integrated screw-mounting holes for direct backplate installation within an IP54 or better enclosure.
2
Wire the AC power line (100 to 240 VAC) to the L1 and L2/N terminals on the top terminal strip. Connect the green ground terminal to the system ground bar.
3
Connect the field input devices to the input terminal points using shielded twisted-pair cables for signals exceeding 10 meters to reduce ambient electrical noise susceptibility.
4
Connect external loads to the transistor outputs, ensuring polarity is correct for the PNP source output circuitry, and verify current draw does not exceed 300 mA per point.