Allen-Bradley 1771-IBN High-True Input Module

Series#: AllenBradley

Product Details

The 1771-IBN ALLEN-BRADLEY HIGH-TRUE INPUT MODULE delivers reliable, high-speed digital sensing for demanding industrial control systems.
Engineered for high-true logic applications, ensuring seamless integration with PLC-5 and other Allen-Bradley platforms.
Features 16 input channels with 24V DC operation, offering precise signal detection for proximity switches and sensors.
Designed with optical isolation to protect against electrical noise and transient surges, enhancing system uptime.
Compact form factor fits standard 1771 I/O chassis, simplifying installation and maintenance in control panels.
Backed by rigorous factory testing and long-term reliability, ideal for process automation and manufacturing lines.
100% Genuine and New, rigorously inspected before international dispatch.

Specification

The 1771-IBN ALLEN-BRADLEY HIGH-TRUE INPUT MODULE is a critical component for industrial automation systems requiring precise digital input acquisition. As part of the renowned Allen-Bradley 1771 I/O family, this module is specifically designed for high-true logic configurations, where a positive voltage (typically 24V DC) indicates an ON state. It is widely used in PLC-5 and compatible control systems for monitoring limit switches, pushbuttons, and other discrete sensors in harsh factory environments. The module features 16 isolated input channels, each with LED status indicators for quick troubleshooting, and supports sinking or sourcing field wiring configurations. With its robust optical isolation and surge protection, the 1771-IBN ensures signal integrity even in electrically noisy settings, making it a trusted choice for automotive, packaging, and material handling applications.

Parameter	Specification
Model Number	1771-IBN
Module Type	High-True Digital Input Module
Number of Input Channels	16
Input Voltage Rating	24V DC (10-30V DC operating range)
Input Logic	High-True (Sourcing or Sinking field wiring)
Input Current (per channel)	8 mA typical at 24V DC
Isolation	Optical isolation between inputs and backplane; 1500V AC channel-to-ground
Response Time (ON to OFF)	1 ms maximum
Response Time (OFF to ON)	1 ms maximum
Backplane Current Consumption	150 mA at 5V DC (typical)
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% (non-condensing)
Dimensions (H x W x D)	4.5 x 1.75 x 5.0 inches (114 x 44 x 127 mm)
Weight	0.5 lbs (0.23 kg)
Compatible Chassis	1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B (all 1771 series)
LED Indicators	16 green LEDs (one per channel) for input status
Field Wiring	Removable terminal block (1771-WN or similar)
Standards Compliance	UL 508, CSA C22.2 No. 142, CE
Certifications	Class I, Division 2 (hazardous locations)