Part of the Omron CP-Series Compact PLCs series — see the full model table, lifecycle status and replacement parts.
Omron CP1W-40EDR — 24 In / 16 Relay, Expansion
SKU: CP1W-40EDRUSD 68.00
CP1W expansion I/O unit, 40 points total — 24 × 24 VDC inputs (PNP/NPN selectable) plus 16 × 2 A relay outputs, for CP1L / CP1H / CP1E PLCs.
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Product Overview
The Omron CP1W-40EDR is the most-deployed CP-series expansion I/O module — 40 points total in a 150 × 90 × 50 mm housing that sits to the right of the CP1L / CP1H / CP1E CPU and connects via a flat ribbon-style CP1W-CN811 cable (sold separately, 80 mm typical). manufactured by Omron Corporation. Hengyixin Automation stocks this relay in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.
The breakdown: 24 × 24 VDC inputs and 16 × mechanical relay outputs. The 'E' in the part number indicates Expansion I/O unit; the 'D' indicates DC inputs; the 'R' indicates Relay outputs (versus 'T' for transistor or 'S' for triac).
Each relay can switch any mix of AC or DC within its rating.
Key Features
- Input ON/OFF filter settable 0 to 32 ms in 1 ms increments from CX-Programmer
- 2 A relay output per point, 8 A per common, rated 250 VAC / 24 VDC
- 40 I/O points total — 24 × 24 VDC inputs and 16 × 2 A relay outputs
- Mechanical relay life 100,000 operations at rated load
- SKU: CP1W-40EDR
- Series: CP1W Expansion I/O
- Voltage: 24 VDC
- I/O: 40 I/O
Best-Fit Applications
- Building a small batch-control panel on a CP1L-L20DR-A where extra inputs and outputs are needed but space is tight
- Expanding a CP1L-M40DR-A from 40 to 80 I/O for mid-size conveyor sorting applications
- Adding 16 × 230 VAC solenoid-valve outputs to a CP1E-N40DR-A on a packaging machine header
Buying Checklist
- Pick the CP1W-40EDT for all-transistor NPN outputs
- Pick the CP1W-40EDT1 for all-transistor PNP sourcing outputs
- Pick the CP1W-AD042 when you need analog inputs instead of digital
Technical Specifications
| Model | CP1W-40EDR |
|---|---|
| Series | CP1W Expansion I/O |
| Type | Digital I/O expansion module |
| Total Points | 40 (24 inputs + 16 relay outputs) |
| Digital Inputs | 24 × 24 VDC |
| Input Type | PNP/NPN configurable (sink or source via COM polarity) |
| Input Rated Voltage | 24 VDC ±10 % (20.4 to 26.4 V) |
| Input ON Voltage | ≥ 17.0 VDC |
| Input OFF Voltage | ≤ 5.0 VDC |
| Input Impedance | ≈ 4.4 kΩ |
| Input Response Time | 0 to 32 ms filter settable (default 8 ms) |
| Input ON Current | ≥ 5 mA typical |
| Digital Outputs | 16 × mechanical relay, form A (SPST-NO) |
| Output Rated Load | 2 A / 250 VAC or 2 A / 24 VDC resistive (8 A per common) |
| Output Inrush Current | ≤ 5 A peak |
Manufacturer documentation
Omron's own product page, where the manufacturer's current specification and lifecycle information are published. We are an independent distributor and cannot mirror those documents; the link goes to Omron's site.
FAQ for CP1W-40EDR
Can the CP1W-40EDR be used with a CP1E-E40DR-A host?
Yes. The CP1W-40EDR expands the CP1E-E40DR-A from 40 to 80 I/O with the CP1W-CN811 cable. The CP1E-E supports up to 3 expansion units (subject to 160-point ceiling) — so adding 1 × CP1W-40EDR works, but adding a second CP1W-40EDR plus a third module would exceed the host's I/O ceiling. Configure the expansion I/O mapping in CX-Programmer under PLC / I/O Table Settings or Sysmac Studio under Controller / Configuration.
Are the inputs PNP or NPN by default?
Both. The CP1W-40EDR inputs accept either polarity because the input circuit is a balanced-bridge design — wire the COM terminal to either +24 V (for NPN / sinking sensors which switch to 0 V) or to 0 V (for PNP / sourcing sensors which switch to +24 V). The PLC detects the input state regardless of which you choose.
How fast can the relay outputs switch?
Around 10 ms operate, 5 ms release — typical for a mechanical relay with armature. For high-speed output applications (1 ms pulse trains, stepper pulse trains, frequent valve switching), use the all-transistor CP1W-40EDT (NPN) or -40EDT1 (PNP) instead, which switches in ≤ 0.1 ms.
Can the 2 A relay output drive a small electric motor?
Direct motor switching is generally not recommended because of motor inrush current (6× to 10× the steady-state running current). For a 2 A relay the max safe motor rating is around 100 to 150 W of inductive AC motor load. Larger motors should be switched through a contactor — the relay drives the contactor coil (typically 5 to 10 VA) and the contactor's main contacts handle the motor current.
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