Allen-Bradley 1734-EP24DC Expansion Power Supply

Allen-Bradley 1734-EP24DC POINT I/O Expansion Power Supply

Product Introduction

The 1734-EP24DC belongs to the Allen‑Bradley POINT I/O family. Its main job is to supply extra power when your system grows. Specifically, it passes 24V DC field power to modules on the right side. Additionally, it creates a new field voltage partition. This separation protects modules on the left from interference. Many engineers choose the 1734-EP24DC for its dark gray housing. That color makes visual identification quick and easy.

Key Technical Specifications

This expansion power supply accepts a nominal input of 24VDC. The acceptable voltage range runs from 10 to 28.8VDC. Its maximum supply current reaches 10 amps. Furthermore, the inrush current is 6 amps for 10 milliseconds.

The POINTBus output current depends on mounting orientation. For horizontal mounting, you get 1 A at 10–19.2V input. Meanwhile, at 19.2–28.8V input, it provides 1.3 A. For vertical mounting, the output is 1 A across 10–28.8V input.

Power consumption equals 9.8 watts at 28.8V DC. Power dissipation is 3 watts, while thermal dissipation measures 10 BTU/hour. Isolation voltage is rated at 50V continuous. The unit also includes reverse polarity overvoltage protection.

Mechanical and Environmental Parameters

The 1734-EP24DC operates reliably in harsh conditions. Operating temperature ranges from -13°F to 140°F (-25°C to 60°C). Non-operating temperature goes from -40°F to 185°F (-40°C to 85°C). Humidity tolerance is 5–95% non-condensing.

For vibration, this module withstands 5g at 10–500 Hz. Operating shock rating is 30g, and non-operating shock is 50g. These ratings make it suitable for factory floors and mobile equipment.

Installation Guidelines

You can mount the 1734-EP24DC either horizontally or vertically. First, attach it to the DIN rail. Next, snap it onto the left side of your existing POINT I/O system. Remember, this expansion supply powers only modules on its right side.

The module supports between 4 and 17 I/O modules on the right. However, the exact number depends on each module’s current draw. Always calculate total POINTBus current before adding modules. Additionally, use it with any 1734 POINT I/O adapter for full system assembly.

A built-in field power status LED and a 5V system power LED help with diagnostics. If input voltage drops out for 10 ms at 10V max load, output voltage stays within spec.

Why Choose the 1734-EP24DC?

First, this power supply simplifies system expansion. Instead of replacing your existing adapter, you just add the 1734-EP24DC to create a new power segment. Moreover, it separates field power automatically. Therefore, you avoid noise or voltage drops across long I/O chains.

Besides its electrical benefits, the dark gray color prevents mixing it up with standard I/O modules. That small detail saves time during troubleshooting. Finally, the wide input voltage range (10-28.8V DC) ensures stable operation even with fluctuating power sources.

Packaging List

• 1 x Allen-Bradley 1734-EP24DC POINT I/O expansion power supply module

• 1 x Removable terminal block (24V DC field power connection)

• 1 x Mounting base for DIN rail installation

• 1 x End cap / terminating cover

Note: No cables, certificates, or warranty documents are included in this package.

Shipping Information

We ship worldwide using FedEx, UPS, or DHL. All orders are processed within 24-48 business hours. Tracking number provided upon shipment.

Frequently Asked Questions (FAQ)

1. Can I use the 1734-EP24DC with any POINT I/O adapter?
Yes, the 1734-EP24DC is compatible with all 1734 POINT I/O adapters. It works seamlessly to extend power for modules placed to its right.

2. How many modules can I place after the 1734-EP24DC?
You can install between 4 and 17 modules on the right side. The exact number depends on each module's POINTBus current draw. Always check your total current against the output rating.

3. What happens if I mount this unit vertically?
When mounted vertically, the output current drops to a flat 1 A across the full input range (10-28.8V). Horizontal mounting gives you higher current (1.3 A) at higher input voltages.

4. Does the 1734-EP24DC have any protection features?
Yes, it includes reverse polarity overvoltage protection. This prevents damage if you accidentally swap the DC input wires.

5. What do the LED indicators show?
Two LEDs are built-in. The field power status LED shows 24V DC field power is present. The 5V system power LED indicates the internal POINTBus logic power is working correctly.