Allen-Bradley 1794-IB8 Flex I/O Input Module

Series#: AllenBradley

Product Details

1794-IB8 Allen-Bradley FLEX I/O Input Module – 8-point discrete input solution for industrial automation.
Compact, modular design integrates seamlessly into 1794 FLEX I/O system backplanes.
Supports 24V DC sinking or sourcing inputs with high noise immunity for reliable operation.
Hot-swappable capability minimizes downtime during maintenance or expansion.
Compatible with ControlLogix, CompactLogix, and SLC 500 platforms via communication adapters.
Industry-standard isolation and diagnostic features ensure robust performance in harsh environments.
100% Genuine and New, rigorously inspected before international dispatch.

Specification

The Allen-Bradley 1794-IB8 is a high-performance FLEX I/O input module designed for distributed control systems requiring reliable discrete signal acquisition. As part of the Rockwell Automation FLEX I/O family, this module provides eight 24V DC input channels in a compact, DIN-rail-mountable package. It offers both sinking and sourcing configurations, allowing flexible integration with sensors, switches, and other field devices. The 1794-IB8 features optical isolation between channels and the backplane, ensuring signal integrity and protection against electrical transients. Its hot-swappable design and diagnostic capabilities reduce system downtime, making it ideal for manufacturing, process control, and material handling applications. Backward-compatible with existing 1794 systems, it supports high-speed data transfer via DeviceNet, ControlNet, or EtherNet/IP communication adapters.

Parameter	Specification
Product Type	Discrete Input Module
Model Number	1794-IB8
Number of Inputs	8
Input Voltage	24V DC nominal (10-30V DC range)
Input Type	Sinking or sourcing (user-selectable per module)
Input Current	8 mA typical at 24V DC
Isolation	Optical isolation, 1500V AC between channels and backplane
Response Time	Off to On: 1 ms; On to Off: 1 ms
Power Consumption	5V DC Standard Models 50 mA (from backplane)
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
Vibration Resistance	5 g Standard Models 10-500 Hz per IEC 60068-2-6
Shock Resistance	30 g peak acceleration per IEC 60068-2-27
Enclosure Type	Open-style, IP20 (when installed in enclosure)
Dimensions (H x W x D)	94 mm x 45 mm x 75 mm (3.7 in x 1.77 in x 2.95 in)
Weight	Approximately 0.2 kg (0.44 lb)
Wiring	Removable terminal block (1794-TB2 or 1794-TB3)
Communication Protocol	Backplane interface to FLEX I/O adapter (e.g., 1794-ACNR15, 1794-ADN)
Compatible Systems	ControlLogix, CompactLogix, SLC 500, PLC-5 via adapters
Certifications	CE, UL, C-UL, ATEX (Zone 2), IECEx