CJ1W-AD081

Product information

Product Overview

The CJ1W-AD081 is the 8-channel version of Omron’s CJ-series analog input unit — a Special I/O Unit for the CJ I/O Bus, catalogued by Omron as CJ1W-AD081-V1. It doubles the channel count of the AD041 in the same 31 mm slot width.

This page is written for buyers and maintenance engineers sourcing CJ1W-AD081 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-AD081-V1.

Why Buyers Specify This Model

Eight channels in the same footprint as the 4-channel unit

The AD081 occupies the identical 31 mm × 90 mm frontage as the AD041 and also weighs 150 g, so doubling your analog input count does not cost rack width.

Same five ranges, 13-bit resolution

Each channel selects from -10 to 10 V, 0 to 10 V, 0 to 5 V, 1 to 5 V or 4 to 20 mA, at 13-bit input resolution.

Detachable screw terminal block

Wiring is by screw terminal, and the block is detachable for module replacement without re-terminating the harness.

Explicitly not safety-rated

Omron’s catalogue states this unit is not suitable for safety functions. Do not treat it as part of a safety loop.

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	8
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
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

Source: Omron official product catalogue data for CJ1W-AD081-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: cj1w-ad da mad analog i o unit datasheet en
• Datasheet: p059 cj2-series programmable controller datasheet en
• Manual: w490 cj-series analog i o units for nj-series (cj1w-ad0%5B%5D, -da0%5B%5D, -mad42) operation manual 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-AD081, 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

How is the AD081 different from the AD041?

Channel count and density only. Eight inputs instead of four, for the same 31 mm rack width, same height and depth, same weight and the same selectable input ranges. If you need more than eight analog inputs, use multiple AD081 units or step to a higher-density family.

Do the channels need to be the same type?

No — each channel is configured independently in software, so a single AD081 can read voltage transmitters on some channels and current loops on others.

Is there a wiring diagram available?

Yes. Omron publishes an official CJ1W-AD0[]-V1 / DA0[] / DA08[] / MAD42 I/O wiring diagram, and it is linked in the documentation section below.

Production status?

Current. Omron’s official catalogue data shows no end-of-production notice for this model.