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1791-24BR Allen-Bradley
Original price
$400.00
-
Original price
$1,400.00
Original price
$400.00
$400.00
-
$1,400.00
Current price
$400.00
Trusted By
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The Allen-Bradley 1791-24BR (Series B) is a DC block I/O module within the Bulletin 1791 CompactBlock I/O platform. It provides twenty-four DC input channels divided into three groups of eight, and one group of eight Form A (normally-open) electromechanical relay outputs. The module integrates into a distributed I/O architecture for discrete control. Typical industrial applications include signal collection and relay actuation in panel-mounted, cabinet-based control systems for machinery, conveyors, or process sequencing.
Best Suited For
- Discrete input collection (DC signals)
- Relay actuation of resistive or inductive loads
- Cabinet-mounted distributed I/O expansion
- Integration with CompactBlock, Logix, or SLC control systems
Inputs / Outputs
24 Inputs; 8 Relay Outputs
Input voltage range
10-30 V DC
Relay output load
20-132 V AC @ 1 A; 20-30 V DC @ 1 A; 125 V DC @ 0.2 A
Operate / release time
5 ms (±1 ms) typical
Input signal delay (fast/slow)
Fast: 1.0 ms ON; 5.0 ms OFF; Slow: 1.0 ms ON; 18.0 ms OFF (max)
Technical Specifications
I/O & Electrical
Inputs per block
24 (3 groups of 8)
On-state voltage range
10-30 V DC
On-state current
Max 11.0 mA @ 30 V; Min 2.5 mA @ 10 V
Off-state voltage (max)
5 V DC
Off-state current (min)
1.5 mA
Input impedance (max)
3.4 kΩ
Output configuration
8 Form A electromechanical relays
Output voltage range
20-132 V AC @ 1 A; 20-30 V DC @ 1 A; 125 V DC @ 0.2 A
Output current rating (resistive)
1 A @ 20-132 V AC; 1 A @ 20-30 V DC; 0.2 A @ 125 V DC
Output current rating (inductive)
0.5 A @ 20-132 V AC (cos θ = 0.4); 1 A @ 20-30 V DC (L/R = 7 ms); 0.1 A @ 125 V DC (L/R = 7 ms)
Surge current (inductive)
0.5 A @ 20-132 V AC; 1 A @ 20-30 V DC; 0.1 A @ 125 V DC (L/R = 7 ms)
Power rating
Up to 132 W AC resistive; 30 W DC resistive (30 V); 25 W DC resistive (125 V); 66 VA AC inductive; 30 VA DC inductive (30 V); 12.5 VA DC inductive (125 V)
Expected contact life
100,000 operations @ rated loads
Off-state leakage (at 132 V AC)
2 mA
Switching frequency
1 Hz @ max load; 10 Hz @ min load
Bounce time (max)
1 ms
Communication & Power
Operate / release time
5 ms (±1 ms) typical
