Part of the Omron CP-Series Compact PLCs series — see the full model table, lifecycle status and replacement parts.
Omron CPM1A-20EDT — CPM1A 20-Pt Expansion, NPN
SKU: CPM1A-20EDTUSD 62.00
Omron CPM1A-20EDT CPM1A-series 20-point expansion I/O unit, 12 DC inputs + 8 NPN outputs, 24 VDC. In stock, China shipping.
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Product Overview
The Omron CPM1A-20EDT is the CPM1A-series 20-point expansion I/O unit, manufactured by Omron Corporation. Hengyixin Automation stocks this I/O expansion unit in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.
It adds 12 DC inputs (24 VDC, sink/source compatible, 15 ms response) and 8 NPN sourcing transistor outputs (300 mA per point, 1 ms response) to a CPM1A CPU. It chains off the CPU's expansion port with a flat ribbon cable; up to 3 expansion units can stack behind one CPU for up to 100 total I/O points.
24 VDC supply, 1.5 W power consumption, photo isolation 2.3 kV AC between input and output. M3 screw terminals. 86 x 90 x 49 mm, 300 g. Operating 0 to 55 C. Compatible with CPM1A-10CDR-A-V1, CPM1A-20CDR-A-V1, and CPM1A-30CDT-D-V1 CPUs only - NOT with CP1E, CP1L, or CJ. For the relay-output sibling pick CPM1A-20EDR. For the modern CP1 equivalent at 20-I/O pick CP1W-20EDT.
Key Features
- CPM1A-series Expansion I/O Unit with 20 I/O points: 12 DC inputs (24 VDC sink/source) and 8 NPN sourcing transistor outputs at 300 mA per point
- 15 ms input response and 1 ms output response, photo isolation 2.3 kV AC between input and output groups
- Chains off a CPM1A CPU expansion port via flat ribbon cable; up to 3 expansion units stack behind one CPU for up to 100 total I/O points
- 24 VDC supply, 1.5 W power consumption, M3 screw terminals, 86 x 90 x 49 mm, 300 g, 0 to 55 C operating temperature
- SKU: CPM1A-20EDT
- Series: CPM1A-series Expansion I/O Unit for CPM1A-series CPU
- I/O: 20 points
Best-Fit Applications
- Adding 12 photo-eye inputs and 8 solenoid outputs to a CPM1A-30CDT-D-V1 retrofit on a packaging line where the original PLC was under-sized
- Spare replacement on a CPM1A-20CDR-A-V1-controlled conveyor cell where the original expansion was lost in a long-term maintenance cycle
- Spare part for a filling machine that uses two CPM1A-20EDT expansions to drive 16 solenoid valves from the CPU
Buying Checklist
- Pick the CPM1A-20EDT when the existing CPU is CPM1A-series and the loads need NPN (sourcing) transistor outputs at 300 mA.
- Pick the CPM1A-20EDR instead when the loads need relay outputs at 2 A instead of 300 mA transistor outputs on the same 20-I/O body.
- Pick the CP1W-20EDT instead when the system is on a modern CP1L or CP1H CPU and needs 20-I/O expansion at 24 DC in / 16 NPN out.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | CPM1A-series Expansion I/O Unit for CPM1A-series CPU |
| Model / SKU | CPM1A-20EDT |
| Total I/O | 20 points; 12 DC inputs + 8 NPN sourcing transistor outputs |
| Input Specs | 24 VDC nominal; sink/source compatible; input current 5 mA typical; ON response 15 ms max / OFF response 15 ms max |
| Output Specs | 8 NPN sourcing transistor outputs; 24 VDC; 300 mA per point; ON response 1 ms max / OFF response 1 ms max |
| Isolation | Photo isolation 2,300 VAC for 1 min between input group, output group, and CPU internal circuit |
| Connection | M3 screw terminals; flat ribbon expansion cable to CPU (supplied with the unit) |
| Supply / Power | 24 VDC supply (same as CPM1A CPU); 1.5 W power consumption; supply range 20.4 to 26.4 VDC |
| Expansion | Up to 3 expansion units stack behind one CPM1A CPU; up to 100 total I/O points with expansion |
| Environment | Operating 0 to 55 C ambient; storage -20 to 75 C; humidity 10 to 90 percent non-condensing; IP20 |
| Dimensions / Weight | 86 (W) x 90 (H) x 49 (D) mm; 300 g; CE, UL, CSA |
FAQ for CPM1A-20EDT
What is the Omron CPM1A-20EDT used for?
It is the CPM1A-series Expansion I/O Unit with 20 I/O points (12 DC inputs and 8 NPN transistor outputs). Typical uses are adding 12 photo-eye inputs and 8 solenoid outputs to a CPM1A-30CDT-D-V1 retrofit, spare replacement on a CPM1A-20CDR-A-V1-controlled conveyor cell, and spare part for a small filling machine that uses two CPM1A-20EDT expansions to drive 16 solenoid valves.
Is the CPM1A-20EDT compatible with CP1E or CP1L?
No. The CPM1A-20EDT is for the CPM1A series only - it connects to a CPM1A CPU via the dedicated flat ribbon expansion cable. CP1E / CP1L / CP1H / CJ-series CPUs need their own expansion units: CP1W-8ET, CP1W-16ER, CP1W-20EDT, CP1W-40EDT for CP1L / CP1H; CJ1W-ID211, CJ1W-OD212 for CJ.
How many CPM1A-20EDT units can connect to one CPM1A CPU?
Up to 3 expansion units of any CPM1A I/O mix (CPM1A-8ED, CPM1A-20EDT, CPM1A-20EDR) chain off a single CPM1A CPU for up to 100 total I/O points. The 20-I/O CPM1A CPU allows 1 expansion; the 30-I/O CPU allows 2 expansions; the 40-I/O CPU allows 3 expansions. Order the CPM1A expansion ribbon cable with each unit.
What is the output current rating of the CPM1A-20EDT?
300 mA per output point, 24 VDC. Output response is 1 ms max ON / 1 ms max OFF, suitable for pneumatic solenoids, small DC relays, and indicator lamps. For 2 A relay outputs on the same 20-I/O body pick the CPM1A-20EDR. For higher transistor current pick the modern CP1W-20EDT (24 DC in / 16 NPN out at 0.3 A).
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