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.
1-Year Warranty
Full manufacturer warranty
Global Shipping
Worldwide delivery available
Genuine Omron
100% authentic product
Ready to Ship
Usually ships within 24h
In Stock
This item is available for immediate shipment from our warehouse.
Contact for pricing, bulk discounts, and shipping
Product Overview
The CP1W-40EDR is the most-deployed CP-series expansion I/O module — 40 points total in a 90 × 150 × 85 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). 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).
How to fit a CP1W expansion rack
Every CP1L, CP1H, and CP1E CPU supports up to 3 CP1W expansion units in series (CP1W-40EDR, -20EDR, -16ER, etc.) using the CP1W-CN811 ribbon cable. The total point count is limited by the host CPU's I/O table — CP1L-M / CP1L-L support up to 160 I/O total, so a CP1L-M40DR-A with three CP1W-40EDR units can scale to 40 + 3 × 40 = 160 points; CP1E-E 40-point can host up to two CP1W-40EDR modules before the 160-point ceiling.
Where to use relay vs transistor outputs
The 16 × 2 A relay outputs of the CP1W-40EDR are the right choice for mixed-signal panels that switch both AC and DC loads — solenoid valves on 230 VAC, low-voltage indicators on 24 VDC, indicator lamps on 110 V, and motor starter coils on 120 V contactor coils. Each relay can switch any mix of AC or DC within its rating.
Key Features
- 40 I/O points total — 24 × 24 VDC inputs and 16 × 2 A relay outputs
- PNP or NPN configurable inputs
- 2 A relay output per point, 8 A per common, rated 250 VAC / 24 VDC
- Mechanical relay life 100,000 operations at rated load
- Connects to any CP1L-M, CP1L-L, CP1H, or CP1E CPU via CP1W-CN811 cable
- Up to 3 CP1W expansion modules per host CPU, total 160 I/O addressability
- Input ON/OFF filter settable 0 to 32 ms in 1 ms increments from CX-Programmer
- Easy I/O registration via Sysmac Studio or CX-Programmer 'Expansion Unit' auto-detect
- SKU: CP1W-40EDR
- Series: CP1W Expansion I/O
- Voltage: 24 VDC
- I/O: 24 I/O
Best-Fit Applications
- 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
- Adding 24 × 24 VDC sensor inputs for an automatic assembly-line PLC reading limit switches and proximity sensors
- Building a small batch-control panel on a CP1L-L20DR-A where extra inputs and outputs are needed but space is tight
Buying Checklist
- Pick the CP1W-40EDR for the highest-density mix — 24 inputs and 16 relays in one module
- Pick the CP1W-20EDR when you need fewer points and don't want to pay for 40-point I/O blocks
- Pick the CP1W-16ER when you need 16 × 16 expansion with all relay outputs
- 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 |
Resources & Downloads
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.
Similar Products
Explore related Omron models often viewed alongside this product.
