Product Overview

The Allen-Bradley 1734-OB4E acts as a high-density, distributed I/O solution within the Bulletin 1734 POINT I/O family. This module delivers four channels of 24V DC sourcing outputs, specifically engineered for applications requiring granular fault diagnostics and electronic protection. We supply this unit as 100% Brand New and Original, ensuring maximum uptime for your mission-critical control architectures.

Technical Specifications

Engineering Advantages

• Integrated Electronic Fusing: The 1734-OB4E eliminates the need for external fuses. The module detects short circuits or overloads and shuts down the affected channel instantly, protecting your field wiring and surrounding hardware.

• Space-Efficient Design: The compact footprint allows engineers to scale I/O density in cramped control cabinets. You can install these modules horizontally or vertically to fit specific enclosure constraints.

• Advanced Diagnostics: Unlike standard output modules, the "E" version provides wire-off detection. This allows your PLC logic to identify broken field wires before they cause process downtime.

• Hot-Swappable Functionality: Maintenance teams can replace the 1734-OB4E while the rest of the system remains powered (Removal and Insertion Under Power - RIUP), significantly reducing Mean Time to Repair (MTTR).

• DeviceLogix™ Capability: This module supports local logic execution, enabling faster response times for localized safety or control loops independent of the main controller's scan time.

FAQs

How does the electronic protection reset after a fault?

Once you clear the short circuit or overload condition in the field, you can reset the electronic protection via the control software (Studio 5000) or by cycling the field power to the module, depending on your configuration.

What is the difference between the 1734-OB4 and the 1734-OB4E?

The "E" suffix designates "Electronically Protected." While the standard 1734-OB4 provides basic sourcing outputs, the 1734-OB4E adds internal circuitry to protect against short circuits and provides diagnostic feedback for wire-off conditions.

Which terminal base is compatible with this module?

The 1734-OB4E installs onto a 1734-TB or 1734-TBS terminal base assembly. The module plugs directly into the base, which remains wired to the field devices, facilitating quick module replacement.

Can I use this module with a 1734-AENTR adapter?

Yes. The 1734-OB4E communicates seamlessly across EtherNet/IP, ControlNet, or DeviceNet when paired with the corresponding POINT I/O communication adapter.