Allen-Bradley 1734-IB8 | POINT I/O Digital Sinking Input Module

The 1734-IB8 from Allen-Bradley is a POINT I/O module that delivers eight discrete sinking input channels within a compact design. It integrates seamlessly with POINT I/O communication adapters, enabling distributed I/O systems for flexible industrial automation.

Input and Electrical Specifications

The 1734-IB8 operates at a nominal 24VDC input voltage, supporting an ON-state range between 10VDC and 28.8VDC. Each input channel requires 2–5mA current, with a nominal 4mA at 24VDC. Additionally, the module integrates a fixed 0.5 ms hardware filter and a user-selectable software filter adjustable from 0 to 63 ms.

Module Design and Indicators

This module contains one group of eight inputs, simplifying wiring and configuration. It features eight yellow LED indicators for input status and one green/red LED indicator for module logic status. These visual indicators provide real-time feedback on channel activity and system condition.

Physical and Mechanical Features

The 1734-IB8 measures 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 inches) and weighs only 31.8 g (1.12 oz), making it an ideal choice for applications with limited panel space. It requires installation with a 1734-TB or 1734-TBS terminal base assembly and uses key switch alignment in position 1 for correct setup.

Performance and Reliability

With a power dissipation of 1.6W (5.5 BTU/hour) and POINTBus current draw of 75 mA, the 1734-IB8 ensures stable performance with minimal energy loss. Its open-style enclosure allows flexible integration into industrial environments, supporting reliable data acquisition and control in distributed architectures.