Allen-Bradley 1756-DHRIO ControlLogix

Name: Allen-Bradley 1756-DHRIO ControlLogix
Brand: Allen-Bradley
SKU: 1756-DHRIO
Price: 149.99 USD
Availability: InStock

In stock: 1 unit in Milwaukee, WI. Physically stocked and ready to ship or available for local pickup. Includes a 1-year full-function warranty.

Data Highway Plus / Remote I/O module · two channels configurable for DH+ messaging or as a Remote I/O scanner/adapter

Allen-Bradley 1756-DHRIO ControlLogix DH+ / Remote I/O module (1 of 5)

Actual NJT inventory photos

Price

$149.99USD

Used units available

Request Repair Quote

Part Number	1756-DHRIO
Description	ControlLogix DH+ / Remote I/O module. In stock in used condition, Series A.
Shipping	Ships same or next business day UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Pickup	Free local pickup at 2122 N Prospect Ave. Call ahead at (414) 331-5954.
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price ($22.50) 3 years +25% of product price ($37.50) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1756-DHRIO after your purchase for a 10% core credit ($15). We also purchase old or damaged parts outright.

Replacement Options for 1756-DHRIO

Pick a condition and series below. UPS Ground shipping included.

Allen-Bradley 1756-DHRIO/A ControlLogix – Series A, Used

Allen-Bradley 1756-DHRIO/A ControlLogix – Series A, Used, second photo

Allen-Bradley 1756-DHRIO/A ControlLogix Communications Interface DH+/RIO

$149.99 USD

Condition: Used

Series A

1 in stockView details

Variants

Part NumberConditionSeriesQtyPrice

1756-DHRIO/A$149.99

Used · Series A · 1 in stock

1756-DHRIO/AUsedSeries A1$149.99 USD

1756-DHRIO

Refurbished — pick series, then request a quote

Series neededRequest Quote

1756-DHRIORefurbishedSeries needed—Request Quote

Availability

1 unit in stock

Part Number Decoder

ControlLogix DH+ / Remote I/O module

1756DHRIO

1756: BulletinControlLogix: Rockwell Automation's chassis-based control platform (controllers, I/O, communication modules, power supplies and chassis).
DHRIO: Module codeData Highway Plus / Remote I/O module, two channels configurable for DH+ messaging or as a Remote I/O scanner/adapter.

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

Series & Revisions

Series A in stock; other series on request.

Series notes: Logix keys on catalog number and firmware revision, not series; with the default Compatible Module keying, any series of the same catalog number is accepted in the slot.

Intended Use

Built for legacy DH+ and Remote I/O integration applications. The module ties a ControlLogix system into existing PLC-5 and SLC 500 networks, so plants can modernize a controller while keeping the installed Remote I/O racks, PanelView terminals and DH+ links in service.

Physical Data

Weight and DimensionsWeight0.62 lb (0.28 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)

Weight	0.28 kg (0.62 lb) Typical unit weight
Dimensions (H × W × D)	145 × 35 × 145 mm (5.7 × 1.4 × 5.7 in.) Single-slot module
Shipping Weight	0.81 kg (1.78 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.

Similar Part Numbers

1756-HIST2G Module code: FactoryTalk Historian Machine Edition module with 2 GB
1756-RM2 Module code: Redundancy module, second generation

Allen Bradley Information

Technical Specifications8 parameters from manufacturer-published specifications

Module type	Data Highway Plus / Remote I/O communication interface
Channels	2, each configurable as DH+ or Remote I/O
Data rates	57.6, 115.2 or 230.4 kbps
Remote I/O capacity	32 logical racks and 16 block-transfer connections per RIO channel
Connections	32
Backplane current	850 mA @ 5.1V DC
Power dissipation	4.5 W
Chassis slots	1

Typical manufacturer-published values for this catalog number; confirm against the current manufacturer documentation before specifying.

Still have questions?

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

Frequently Asked Questions

What is the 1756-DHRIO?

The Allen-Bradley 1756-DHRIO is a ControlLogix DH+ / Remote I/O module: Data Highway Plus / Remote I/O module, two channels configurable for DH+ messaging or as a Remote I/O scanner/adapter.

What condition is it in?

NJT Automation currently has 1 unit of the 1756-DHRIO in stock in used condition (Series A). Each listing states its own condition and series. Used means a unit removed from service and sold without refurbishment. Cosmetic condition, any functional testing performed, and the warranty term are stated on each unit’s own listing. From the listing: This item is in good working condition with some signs of use and is fully functional. It comes with 90-day free returns and a 1 year NJT warranty.

How much does it cost?

At NJT Automation, 5 1756-DHRIO ControlLogix DH+ / Remote I/O modules have sold since 2024 for $500 – $1,200, with a median of $950. Right now 1 unit is in stock at $150, depending on condition and series.

When does this part ship?

1 unit of the 1756-DHRIO ControlLogix DH+ / Remote I/O module are on the shelf in Milwaukee, WI, priced from $149.99. Orders before 5:00 PM Central on a business day ship the same day; next-day air is available at checkout.