Allen-Bradley 1756-OB8E ControlLogix Digital Output Module 8-point

Allen-Bradley 1756-OB8E ControlLogix digital output module, 8-point electronically fused 12/24V DC (10…31.2V DC) sourcing outputs. NJT Automation sources the 1756-OB8E on request; send the part number for a replacement or repair quote.

Quote required. Request a quote below for pricing and delivery.

Allen-Bradley 1756-OB8E ControlLogix digital output module, 8-point, 12/24V DC – front view

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Part Number	1756-OB8E
Price	On Request Availability and condition determine final quote.
Description	ControlLogix digital output module, 8-point, 12/24V DC.
Shipping	UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price 3 years +25% of product price View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1756-OB8E after your purchase for a 10% core credit. We also purchase old or damaged parts outright.

Availability

Sourced on request

We do not have a 1756-OB8E on the shelf right now. We can source one through our supplier network; request a quote and we confirm availability, price and lead time before you commit.

Sourcing

Sourced through our Level 1 network of vetted US suppliers. Each unit is checked before it ships and carries the same NJT warranty and return policy as our own stock. Quotes within one hour during business hours; typical delivery 3–5 business days, next-day air available. Sourced parts are not available for local pickup.

Request Quote How Level 1 sourcing works

Repairs

1756-OB8E Mail-In Repair Service

Part Number Decoder

ControlLogix digital output module

1756OB8E

8-point electronically fused 12/24V DC (10…31.2V DC) sourcing outputs.

1756: BulletinControlLogix: Rockwell Automation's chassis-based control platform (controllers, I/O, communication modules, power supplies and chassis).
O: Module typeOutput module (O).
B: Voltage / signal type12/24V DC (10…31.2V DC) sourcing outputs.
8: Point count8 points.
E: FeatureElectronically fused: internal electronic fusing protects each output group from over-current.

Decoded from the Rockwell Automation catalog-number structure. Series and firmware revision are printed on the product label, not encoded here.

Intended Use

Intended for valve, contactor and indicator switching applications. Solid-state outputs switch 24V DC or AC loads such as solenoid valves, pneumatic manifolds, contactor coils and stack lights at high cycle rates on packaging, assembly and material-handling machines.

Physical Data

Weight and DimensionsWeight0.66 lb (0.30 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)

Weight	0.30 kg (0.66 lb) Typical unit weight
Dimensions (H × W × D)	145 × 35 × 145 mm (5.7 × 1.4 × 5.7 in.) Single-slot module
Shipping Weight	0.83 kg (1.82 lb) Estimated: unit weight plus box and packing material; bills as 2 lb
Shipping Box (L × W × H)	12 × 12 × 8 in. (305 × 305 × 203 mm) Smallest standard box fitting the product with 3 in. cushioning per side

Product weight and dimensions are typical manufacturer-published values and may differ by series or option. Shipping box and weight are estimates for freight planning; the packed unit may ship in a different box.

Datasheet

Datasheet available for download

Generated from product specifications; not an official Allen-Bradley datasheet. For an official datasheet, contact Allen-Bradley or an authorized distributor.

Similar Part Numbers

1756-OV32E Voltage / signal type: 12/24V DC sinking outputs; Point count: 32 points

Allen Bradley Information

Technical SpecificationsLifecycle status

Lifecycle	Active Verify current status with the manufacturer.

Alternate Part Numbers

1756OB8E, 17560B8E

Can the 1756-OB8E be repaired?

Yes. NJT Automation repairs the 1756-OB8E by mail-in: diagnostic evaluation, component-level repair and a functional test, backed by a 1-year full-function warranty.

NJT managed repair. No evaluation fee; no repair, no charge. Prepaid UPS label both ways, $650 minimum, rush available. 1-year full-function warranty included, 2- and 3-year options.

Get a repair quoteor text photos and symptoms to (414) 331-5954

Prefer an independent shop? Compare bids on RepairMode; providers set their own pricing and warranty.

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Common 1756-OB8E failures

Failure patterns we regularly see on ControlLogix digital output module hardware like the 1756-OB8E:

Group of outputs dead when the field power / common for that group has been lost
Output points weak or leaking: driving a load that chatters
Removable terminal block pins bent or corroded, causing intermittent points
Module fault (I/O LED red) after a chassis power event
Output transistor / triac shorted ON after a field short or inductive kick: the point cannot be turned off

Repair or replace?

ReplaceI/O cards like the ControlLogix digital output module are the easiest modules to swap: same slot, same wiring, no setup. Replace the 1756-OB8E when a channel is dead and the machine needs to run now. Order the exact 1756-OB8E. The catalog number sets the 8-point density and 12/24V DC rating, and a different suffix changes one of them. The 1756-OB8E is not shelf stock, so sourcing time is part of the repair-or-replace decision.

RepairA single blown point on the 1756-OB8E is a component-level repair (a driver, input channel or on-board fuse), so repair pays when replacements are scarce or you have several cards with a few bad channels each. The two 1756-OB8E symptoms we see most often are “Output transistor / triac shorted ON” and “Electronic fuse tripped (E-suffix modules) or point dead”. Repaired 1756-OB8E units are function-tested before return and carry a 1-year warranty.

Related services:PLC Repair All Repair Services

Photos by NJT Automation; test videos from NJT or network repair technicians.

Still have questions?

Find answers to shipping, warranties, repairs, and more.

Frequently Asked Questions

What is the 1756-OB8E?

The Allen-Bradley 1756-OB8E is a ControlLogix digital output module: 8-point electronically fused 12/24V DC (10…31.2V DC) sourcing outputs.

What condition is the 1756-OB8E in?

The 1756-OB8E is available in Unused surplus / Refurbished / Used condition. We can quote this part in unused surplus, refurbished, or used condition depending on availability and your preference. Specify your requirement in the RFQ.

When does this part ship?

The 1756-OB8E is sourced on request. Request a quote and we'll confirm availability and lead time, typically a few business days.

How many I/O points does the 1756-OB8E have?

8 points.