Allen-Bradley POINT I/O 1734-OB4E 4-Point DC Output Module

Overview
The Allen-Bradley 1734-OB4E is a POINT I/O 4-channel protected output module designed for compact distributed I/O systems. It provides efficient, space-saving control of DC loads and is optimized for use in applications requiring high reliability, modularity, and easy field wiring. This module delivers robust sourcing outputs, onboard protection, and stable performance in demanding industrial environments.

Key Features

• Supports four non-isolated sourcing outputs organized into one group

• Designed for 24V DC nominal operation, with voltage tolerance from 10V to 28.8V DC

• Integrated protection against short circuits and overload conditions

• Low on-state voltage drop (≤0.2V DC) for energy-efficient operation

• Compact form factor suitable for POINT I/O backplanes and distributed control systems

Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation

• Model Number: 1734-OB4E

• Product Type: POINT I/O Protected Output Module

• Number of Outputs: 4 sourcing (1 group of 4)

• Rated Voltage: 24V DC nominal (10V–28.8V DC range)

• On-State Voltage Drop (Max): 0.2V DC

• Output Current: 1.0 A per output; total module current ≤3.0 A

• Surge Current: 2 A for 10 ms, repeatable every 3 s

• POINTBus Current Draw: 75 mA @ 5V DC

• Power Dissipation (Max): 1.2 W

• Thermal Dissipation: 4.1 BTU/hr @ 28.8V DC

• Isolation Voltage: 50V continuous (reinforced insulation, tested at 2500V DC for 60 s)

• External Power Supply: 24V DC nominal

• Mounting Base: 1734-TB or 1734-TBS terminal base assemblies

• Torque Rating: 0.8 Nm (7 lb-in)

• Keyswitch Position: 1

• Dimensions (H×W×D): 7.55 × 1.2 × 5.6 cm

• Weight: Approx. 60 g

Performance and Design
The module features advanced short-circuit protection and thermal management to prevent field device damage. Its compact design supports easy installation and wiring within control cabinets while maintaining compatibility with the POINT I/O platform.

Applications

• Machine control and automation panels

• Packaging and material handling equipment

• Distributed I/O systems in process automation

• Energy and building management control systems

FAQ

Q1: What type of output configuration does the 1734-OB4E use?
A1: The module uses four non-isolated sourcing DC outputs grouped into a single channel block.

Q2: What kind of protection does it include?
A2: It features built-in short-circuit and overcurrent protection, ensuring long-term reliability.

Q3: What terminal base is compatible with this module?
A3: It can be installed on 1734-TB or 1734-TBS base assemblies.

Q4: What is the maximum total current per module?
A4: The total current must not exceed 3.0 A across all outputs.