Allen-Bradley 1734-OB8 POINT I/O 8-Point Digital DC Sourcing Output Module

Product Overview

The Allen-Bradley 1734-OB8 functions as a high-density digital sourcing output module within the versatile POINT I/O system. This module provides eight independent channels to drive 24V DC loads, including solenoids, actuators, and indicator lights. Its granular "slice" architecture allows engineers to scale distributed I/O systems with precision, minimizing cabinet space while maintaining high-speed control logic. We supply this unit as 100% Brand New and Original, providing factory-sealed hardware to ensure the highest electrical integrity for your automation infrastructure.

Technical Specifications

Engineering Advantages

• Ultra-Fast Signal Response: A maximum signal delay of only 0.1 milliseconds ensures near-instantaneous execution of control commands. This high-speed performance targets precision applications where timing synchronization between the CPU and field actuator remains critical.

• Superior Current Management: Each channel supports a 1.0 Amp current rating, allowing the module to drive larger loads directly without interposing relays. The hardware manages surge currents up to 2 Amps for 10 milliseconds, effectively handling the initial inrush of inductive components.

• Visual Diagnostic Matrix: The module faceplate features 8 yellow status LEDs for individual output monitoring and 2 bi-color (Green/Red) LEDs for module and network health. This comprehensive display allows maintenance teams to identify faulty channels or communication drops at a glance.

• Efficient Modular Integration: The 1734-OB8 utilizes a compact, 12mm wide "slice" design. This solves the challenge of high-density I/O requirements in limited cabinet spaces, allowing for expanded I/O counts without significantly increasing the DIN rail footprint.

FAQs

• Q: What does "Sourcing" mean for the 1734-OB8 outputs?

  A: As a sourcing module, the 1734-OB8 supplies the positive voltage (L1) to the field load. To complete the circuit, you must connect the other side of your field device to the common ground (L2). This module pairs perfectly with sinking input field devices.

• Q: Can the 1734-OB8 handle inductive loads like solenoid valves?

  A: Yes. The 0.2V maximum voltage drop and its ability to handle repeatable 2 Amp surges make it suitable for small to medium inductive loads. However, for maximum contact life and EMI reduction, we recommend using external suppression (diodes) at the load site.

• Q: Does this module require a specific terminal base?

  A: Yes. You must install the 1734-OB8 onto a 1734-TB or 1734-TBS terminal base assembly. The terminal base provides the physical mounting to the DIN rail and the connection points for your field-side wiring.

• Q: What is the benefit of the 50V continuous isolation?

  A: The isolation barrier protects the internal POINT I/O backplane and the connected communication adapter from electrical noise or voltage spikes occurring on the field-side 24V DC wiring. This ensures a localized fault does not compromise the entire I/O rack.