1734-EP24DC | Allen-Bradley | POINT I/O 24V DC Expansion Power Supply

Product Overview

The Allen-Bradley 1734-EP24DC serves as a critical infrastructure component for extended POINT I/O configurations. This Expansion Power Supply breaks the internal communication bus to provide additional supplemental power when the current draw of the I/O modules exceeds the capacity of the network adapter. It regenerates the 5V system power for the backplane and provides a fresh 10A field power bus to drive downstream sensors and actuators. We supply this unit as 100% Brand New and Original, ensuring your distributed I/O rack maintains stable voltage levels and noise isolation.

Technical Specifications

Engineering Advantages

• Extends System Scalability: The 1734-EP24DC overcomes the power limitations of standard communication adapters. By injecting fresh power into the backplane, it allows for the expansion of up to 17 additional I/O modules, facilitating large-scale distributed control without adding a second network node.

• Dual-Zone Electrical Isolation: This module provides 50V continuous isolation between the input power and the backplane. This barrier prevents electrical noise or field-side surges from propagating back to the CPU or network adapter, protecting sensitive logic components.

• Superior Inrush Management: The circuitry handles inrush currents of up to 6 Amps for 10 milliseconds. This capability prevents nuisance tripping during system startup when multiple downstream inductive loads or capacitive sensors energize simultaneously.

• Real-Time Diagnostic Indicators: Two dedicated green LEDs provide immediate visual confirmation of system health. One indicator monitors the 24V field power status, while the second verifies the 5V system logic power, allowing maintenance teams to differentiate between field-side and logic-side power failures instantly.

FAQs

• Q: When do I specifically need to add a 1734-EP24DC to my POINT I/O rack?

  A: You must install a 1734-EP24DC when the total current required by your I/O modules exceeds the output of your adapter (typically 1 Amp for 5V system power). Additionally, you use it to create separate "power groups" if you need to isolate certain modules from others for safety or noise reasons.

• Q: Can I use the 1734-EP24DC to provide different voltages to the field bus?

  A: No. This model specifically targets 24V DC systems. It passes the 24V DC input directly to the internal field power bus. If your application requires AC power for specific I/O modules, you must utilize the 1734-FPD (Field Power Distributor) or an AC-rated expansion supply.

• Q: Does the 1734-EP24DC occupy a network node address?

  A: No. The expansion power supply does not communicate data and does not require an IP address or node ID. It functions purely as a power hardware component, though it does physically occupy one slot on the DIN rail.

• Q: How should I calculate the number of modules this supply can support?

  A: Sum the "PointBus Current" (5V) and the "Field Power Current" (24V) for each module placed to the right of the 1734-EP24DC. Ensure the total PointBus current does not exceed the supply’s rating and that the total field current remains under 10 Amps.