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1791-8BR Allen-Bradley
Original price
$426.42
-
Original price
$687.50
Original price
$426.42
$426.42
-
$687.50
Current price
$426.42
Trusted By
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The Allen-Bradley 1791-8BR is a 1791 Block I/O combination module providing eight discrete 24 V DC inputs and eight relay (dry contact) outputs. It operates on Remote I/O (RIO) protocol and integrates power supply, communication and I/O circuitry in a rackless design for DIN-rail or panel mounting. It typically serves distributed input/output roles adjacent to field sensors and actuators in industrial control systems, reducing wiring runs and interfacing with legacy RIO-based PLC systems.
Best Suited For
- Distributed digital field I/O for Remote I/O (RIO) scanner integration
- Compact block I/O installations on DIN rail or panel
- Legacy PLC-2, PLC-3, PLC-5 automation systems
- Combination of 24 V DC sensor inputs and relay outputs in a single module
Inputs
8 × 24 V DC
Relay outputs
8 dry-contact
External supply
19.2-30 V DC, 300 mA
Power dissipation
9.2 W (max)
Operating temp.
0 to 60 °C
Technical Specifications
I/O & Electrical
Number of inputs
8
Input voltage range (on-state)
10-30 V DC
Input off-state voltage
≤ 5 V DC (max)
Input on-state current
11 mA @ 30 V max
Input off-state current
≥ 1.5 mA
Number of relay outputs
8 dry-contact (N.O.)
Output voltage range
20-30 V DC @ 1 A resistive max
Communication & Power
External power
19.2-30 V DC, 300 mA
Power dissipation
9.2 W max
Thermal dissipation
31.4 BTU/hr max
Communication protocol
Remote I/O (RIO)
Physical & Environmental
Dimensions (H×W×D)
176.5 × 68.8 × 98 mm (6.95″ × 2.7″ × 3.85″)
Operating temperature
0 to 60 °C (32 to 140 °F)
Storage temperature
-40 to 85 °C (-40 to 185 °F)
Relative humidity
5 to 95 % non-condensing
Isolation (power to I/O/logic)
500 V AC
