Allen-Bradley 1734-OB8 | POINT I/O Digital Output Module

Overview

The Allen-Bradley 1734-OB8 is a POINT I/O module designed to control discrete devices through eight sourcing output channels. It delivers a nominal 24VDC output, with each channel handling up to 1A and a module total of 3A. This module operates within a voltage range of 10–28.8VDC, supporting fast switching applications with a 0.1 ms signal delay.

Technical Specifications

The 1734-OB8 dissipates 2.0 W (6.8 BTU/hour) of power and requires 75 mA from the POINTBus. It features two green/red indicators for module and network status, as well as eight yellow indicators for logic side status. The module comes with built-in electronic protection, ensuring safe operation even under overload conditions.

Design and Mounting

With compact dimensions of 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in.) and a weight of 35.4 g (1.25 oz), the 1734-OB8 saves valuable DIN rail space. It is mounted on a 1734-TB or 1734-TBS wiring base assembly and connects seamlessly to adjacent POINT I/O modules or communication adapters.

Application

The Allen-Bradley 1734-OB8 is ideal for energizing relays, solenoids, pilot lamps, and other devices within the supported voltage range. It reliably actuates final control elements, enabling controllers to execute commands directly from the user program. Its scalability depends on the communication adapter and the controller’s memory capacity.

Key Features

• Output Channels: 8 sourcing outputs, 1 group

• Voltage Range: 10–28.8VDC, 24VDC nominal

• Current Capacity: 1A per channel, 3A per module

• Power Dissipation: 2.0 W (6.8 BTU/hour)

• Signal Delay: 0.1 ms

• Indicators: 2 green/red (status), 8 yellow (logic side)

• Dimensions: 56 x 12 x 75.5 mm

• Weight: 35.4 g

• Mounting: DIN rail via 1734-TB or 1734-TBS base

• Protection: Electronic overload protection