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1791-8AR Allen-Bradley

Original price $8,248.50 - Original price $8,700.00
Original price
$8,248.50
$8,248.50 - $8,700.00
Current price $8,248.50
Surplus - Tested (With Warranty)
Need a Specific Revision?
$8,248.50
5 in stock
New / Open-Box Surplus
Need a Specific Revision?
$8,700.00
5 in stock
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Product Details

Description · Specifications · Product Overview

Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.

Product Overview

The 1791-8AR is an Allen-Bradley 1791 Block I/O module providing eight 120 VAC discrete inputs and eight relay-based outputs. Designed for use within Allen-Bradley legacy Remote I/O (RIO) systems-such as PLC-2, PLC-3, PLC-5 or SLC 500 with a 1747-SN RIO scanner-it supplies embedded power, I/O interfacing, signal conditioning, and relay outputs in a compact node. The 1791-8AR facilitates distributed control in applications like machine interfaces, panel-mounted logic termination, and remote discrete I/O points in industrial control systems.

Best Suited For

  • Remote I/O implementation in legacy PLC-2/PLC-3/PLC-5 systems
  • Integration with SLC 500 controllers via 1747-SN RIO scanner
  • Distributed discrete I/O on OEM machinery
  • Panel or machine-mounted discrete I/O node in RIO architectures
Discrete Inputs
8 × 120 VAC
Relay Outputs
8 channels
Embedded power
85-132 VAC, 150 mA
Power dissipation
16.5 W maximum

Technical Specifications

I/O & Electrical

Number of inputs
8 discrete 120 VAC
Input on-state voltage range
79-132 VAC
Number of outputs
8 relay outputs
Output voltage capability
up to 125 V DC at 1 A resistive (distributor spec)
External power voltage
85-132 VAC
External power current
150 mA

Communication & Power

RIO isolation, power supply to RIO
500 VAC
Group-to-group isolation
1250 VAC
Group-to-logic isolation
1250 VAC

Physical & Environmental

Dimensions (H × W × D)
176.5 × 68.8 × 98 mm (6.95 × 2.7 × 3.85 in)
Power dissipation, max
16.5 W
Thermal dissipation, max
56.1 BTU/hr
Operating temperature
0 to 60 °C (32 to 140 °F)
Storage temperature
-40 to 85 °C (-40 to 185 °F)
Relative humidity
5-95 % non-condensing

1-Year Warranty

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USA Stock

Sourced and shipped from Texas, USA. Never anonymous overseas marketplace stock.

30-Day Returns

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Rockwell Automation documentation

Access official manuals, datasheets, and lifecycle information for this part directly from Rockwell Automation.

Visit RockwellAutomation.com

Must Read: Disclaimer

PLC Department sells surplus and refurbished industrial automation products, including but not limited to programmable logic controllers (PLCs), which are sourced exclusively through independent third-party channels. PLC Department is not an authorized distributor, reseller, or representative of any manufacturer listed on this website, including Rockwell Automation or its Allen-Bradley brand. All product warranties, where offered, are provided solely by PLC Department and not by the original manufacturer.

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