Menu

Part of the Omron CP-Series Compact PLCs series — see the full model table, lifecycle status and replacement parts.

Omron CP1W-AD042 4-channel analog input expansion unit — front view showing the 85 × 90 × 31 mm body with 4 differential analog input channels on the removable M3 screw terminal block

Omron CP1W-AD042 — 4 Channel Analog Input Expansion

SKU: CP1W-AD042

USD 86.00

CP-series expansion unit, 4 analog inputs (4-20 mA, 0-20 mA, 0-5 V, 1-5 V, 0-10 V, ±10 V), 14-bit resolution

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.

Request Quote

Contact for pricing, bulk discounts, and shipping

Product Overview

The Omron CP1W-AD042 is the standard 4-channel analog input expansion unit for Omron's CP-series small PLCs (CP1L and CP1E). 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.

Each of the 4 inputs accepts any of the six standard industrial signal ranges — 4 to 20 mA, 0 to 20 mA, 1 to 5 V, 0 to 5 V, 0 to 10 V, and -10 to +10 V — independently configured per channel via DIP switches on the side of the module. Resolution is 14-bit (effective 13-bit + sign, 14-bit unipolar / 14-bit bipolar including sign bit), giving 16384 discrete counts per bipolar range.

For ±10 V bipolar, the -10 to +10 V maps to 8000 to 7FFF hex (-32768 to +32767 raw codes), giving the full 14-bit bipolar resolution.

Key Features

  • 1 ms conversion time per channel
  • Internal 250 Ω current-sense resistor for 4-20 mA / 0-20 mA inputs — no external resistor required
  • 6 user-selectable input ranges per channel via DIP switches: 4-20 mA, 0-20 mA, 1-5 V, 0-5 V, 0-10.
  • 14-bit resolution
  • SKU: CP1W-AD042
  • Series: CP1W Analog I/O Expansion Units

Best-Fit Applications

  • Tank-level measurement on a water-treatment skid — 2 pressure transmitters and 2 flow meters wired to CP1W-AD042 inputs, scaled in.
  • Multi-zone temperature monitoring on a plastic-extrusion line — 4 thermocouples or 4-wire RTDs wired via CP1W-TS001, acquisition rate 4 ms.
  • Weighing system on a batching line — 4 load cells with 0-10 V excitation outputs wired to CP1W-AD042 inputs, CP1L.

Buying Checklist

  • Pick CP1W-ADB21 for 2 high-precision AI
  • Pick CP1W-AD041 for legacy 12-bit 4-channel AI
  • Pick CP1W-TS001 / TS002 for thermocouple or RTD temperature inputs

Technical Specifications

Model CP1W-AD042
Series CP1W Analog I/O Expansion Units
Type 4-channel analog input expansion unit (Option Board / Expansion Unit)
Number of Analog Inputs 4
Number of Analog Outputs 0
Resolution 14-bit (16384 discrete codes for bipolar, 6144 for unipolar)
Input Signal Ranges 0-5 V, 1-5 V, 0-10 V, ±10 V, 0-20 mA, 4-20 mA (DIP-switch selectable per channel)
Input Type Differential (V+ / V- per channel) with AG common
Input Impedance Voltage: 1 MΩ min; Current: 250 Ω (internal sense resistor)
Output Scaling (raw codes) -10 to +10 V: F830 to 07D0 hex (-2000 to +2000 BCD); 0-10 V / 4-20 mA: 0000 to 1770 hex (0 to 6000 BCD)
Wire Range 0.2 to 1.5 mm² (AWG 24 to 16)
5 VDC Current Consumption 80 mA
24 VDC Current Consumption 50 mA
Operating Temperature 0 to +55 °C
Dimensions (W x H x D) 86 × 90 × 50 mm

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-AD042

Can the CP1W-AD042 mix voltage and current inputs on different channels?
Yes — each of the 4 input channels has its own DIP switch on the side of the module that selects the input range independently. Channel 1 could be 4-20 mA (DIP switch setting A), channel 2 could be 0-10 V (DIP switch setting B), channel 3 could be ±10 V (DIP switch setting C), and channel 4 could be 0-5 V (DIP switch setting D) — any combination is permitted.
What's the difference between CP1W-AD042 and CP1W-AD041?
The CP1W-AD042 (this SKU) is the current-generation 4-channel AI with 14-bit resolution and 1 ms per-channel conversion time. The CP1W-AD041 is the legacy 4-channel AI with 12-bit resolution and a slower conversion time (also 1 ms per channel, but the 12-bit resolution gives only 4096 discrete levels vs the AD042's 16384).
Can I scale the raw analog value to engineering units in the CP1L?
Yes — the standard approach is to use the CP1L's SCL2 (scaling) instruction in ladder logic. The raw value 0000 to 6000 hex (0 to 24576 decimal, or 0 to 6000 BCD depending on signal range) maps to engineering unit low and high — for a 4-20 mA pressure transmitter with 0-300 PSI span, the scaling is: zero-scale = 0000 hex raw / 0 PSI, full-scale = 1770 hex raw (6000 BCD) / 300 PSI.
Does the CP1W-AD042 work with the discontinued CP1L-M series?
Yes — the CP1W-AD042 is fully compatible with the CP1L-L (legacy), CP1L-J (legacy), CP1L-M (legacy, discontinued 2027-06-30), and CP1L-EM (current production). The expansion flat-cable connection is identical across all CP1L sub-series, and the analog I/O allocation in CX-Programmer is the same DM-area mapping.

Similar Products

Explore related Omron models often viewed alongside this product.