CJ1W-AD041

Product information

Product Overview

The CJ1W-AD041 is an Omron CJ-series 4-channel analog input unit for the CJ I/O Bus — a Special I/O Unit that mounts on a CJ1 or CJ2 rack to bring four channels of process signal into the PLC. Omron’s catalogue lists this model as CJ1W-AD041-V1, the current revision of the AD041.

This page is written for buyers and maintenance engineers sourcing CJ1W-AD041 as a new part or a replacement. Every specification below is taken from Omron’s own published catalogue data for this model; no third-party or estimated figures are used, and where Omron publishes two different figures for the same parameter, both are shown.

Omron catalogue position: Automation Systems › Programmable Logic Controllers (PLC) › CJ2 › CJ Analogue I/O and Control Units. Official catalogue code for this model: CJ1W-AD041-V1.

Why Buyers Specify This Model

Four input channels, five selectable ranges

Each channel is configurable to -10 to 10 V, 0 to 10 V, 0 to 5 V, 1 to 5 V or 4 to 20 mA, so one unit covers voltage and current loops on the same module. Input resolution is 13 bit.

Screw terminals with detachable terminal block

I/O connection is by screw terminal with a detachable block, which means the module can be swapped without re-terminating a fully wired harness — a practical point when a unit fails on a running line.

Standard input circuit, not a safety unit

Omron’s catalogue classifies the input circuit as standard and states this unit is not suitable for safety functions. If you need safety-rated analog acquisition, that is a different product family and we will say so rather than substitute one.

Rack space

31 mm wide, 90 mm high and 89 mm deep, 150 g — the standard CJ special I/O unit footprint.

Technical Specifications (Official Omron Catalogue Data)

Parameter	Official value
I/O system	CJ I/O Bus
Expansion unit type	Special I/O Unit
Type of module	Analog I/O
Number of analog inputs	4
Linear analog input type	-10 to 10 V, 0 to 10 V, 0 to 5 V, 1 to 5 V, 4 to 20 mA
Resolution of the analog inputs	13 Bit
Input circuit type	Standard
Number of analog outputs	0
I/O connection type	Screw
Number of I/O connectors	1
Detachable I/O terminal block	Yes
Suitable for safety functions	No
Product Height (unpacked)	90 mm
Product Width (unpacked)	31 mm
Product Depth (unpacked)	89 mm
Product Weight (unpacked)	150 g

Omron’s official catalogue export gives the conversion time as 4,000 ms/unit, which contradicts the official CJ1W analog I/O datasheet (A/D conversion period in the ms per point range). The two figures measure different things and the catalogue field is not a conversion time, so it is deliberately omitted here rather than reprinted. Conversion period and resolution settings are specified in the datasheet linked below.

Source: Omron official product catalogue data for CJ1W-AD041-V1, published at industrial.omron.eu. Values are reproduced as published by Omron. Where the official data carries a condition or footnote, the headline figure is shown — request the official datasheet for the qualified figure.

Lifecycle & Availability

Omron’s official product data for this model carries no end-of-production or discontinuation notice — it is listed as a current catalogue item. That is the lifecycle status as published by Omron, not a stock statement on our side.

Availability, condition of supply and lead time are quoted per enquiry because they depend on quantity and on where the goods are held. Tell us the quantity and the date you need it and we will answer with a firm position rather than a promise.

Official Documentation

These are Omron’s own documents for this model and its family. Download them directly from Omron’s document server:

• Datasheet: p059 cj2-series programmable controller datasheet en
• Manual: 0149912-7 cj1w-ad0 1-v1 -da0 1 -da08 -mad42(iowiringdiagram) instruction sheet en
• Manual: w345 cs1 cj1 analog i o units operation manual en

Full technical detail — conversion periods, wiring diagrams, derating and installation requirements — is in these documents. If you need a specific figure we do not show here, ask and we will point you to the exact page rather than paraphrase it.

Ordering This Part

Send us the full catalogue number CJ1W-AD041, the quantity, your delivery address and the date you need the goods. If the part is a replacement, attach a photograph of the existing unit’s nameplate — it removes any doubt about the revision, the output type or the supply voltage, which are the three things that most often cause a wrong part to be shipped.

We do not publish stock, condition or lead time as fixed figures here, because they change: they are quoted per enquiry against the quantity and date you actually need. If a machine is down, say so and give us the required window — that is the information that determines how we source it.

Frequently Asked Questions

AD041 or AD041-V1 — which is it?

Omron’s current catalogue lists only the -V1 revision; the plain CJ1W-AD041 is the earlier revision and shares the same footprint and channel count. Please confirm the code on the existing unit’s nameplate so we quote the revision you actually run.

Does it need a separate power supply?

No. CJ-series special I/O units take power from the rack backplane; the unit is powered from the CJ I/O Bus.

Can it be used with an NJ-series controller?

Omron publishes a dedicated CJ-series analog I/O application guide for NJ-series use — read it before committing, because some functions behave differently under the machine automation controller.

Is it in current production?

Yes. Omron’s official catalogue data for this model carries no end-of-production or discontinuation notice.