1734-EP24DC Allen-Bradley POINT I/O 24VDC Power Extension

Allen-Bradley 1734-EP24DC POINT I/O 24VDC Expansion Power Supply

The Allen-Bradley 1734-EP24DC is a compact POINT I/O expansion power supply module manufactured by Rockwell Automation. Weighing approximately 0.12 kg (0.26 lbs), this dark gray module is designed to break field power distribution and extend internal POINTBus backplane current, allowing system designers to expand their I/O node capacity by adding 4 to 17 additional I/O modules to the right side of the supply.

Key System & Functional Features

The 1734-EP24DC creates a new field voltage partition segment within a POINT I/O assembly, safely isolating field power from the modules located on its left. Compatible with all 1734 POINT I/O communication adapters, it features integrated status LEDs for visual verification of field power and 5V system power states. Built-in reverse polarity protection guards against wiring errors, while a 10 ms voltage ride-through capability ensures uninterrupted operation during minor input power drops.

Technical Specifications

POINTBus Output Current Derating

Installation & Operation Considerations

• Mounting Alignment: Securely snap the lightweight 0.12 kg module onto a standard DIN rail. The dark gray housing provides immediate visual identification against standard light gray POINT I/O terminal bases.
• Current Calculation: Calculate total POINTBus load prior to installation; place additional 1734-EP24DC modules whenever backplane current requirements exceed the supply output rating.
• Environmental Limits: Designed to operate in harsh industrial environments ranging from -25 °C to +60 °C (-13 °F to +140 °F) with up to 5g vibration resistance (10–500 Hz).

Frequently Asked Questions

Q1: How many modules can the Allen-Bradley 1734-EP24DC support?
A1: Depending on the specific current draw of installed components, it can extend backplane power for 4 to 17 POINT I/O modules on its right side.

Q2: Why is the 1734-EP24DC housing dark gray instead of light gray?
A2: The dark gray color allows system operators and technicians to visually differentiate expansion power supplies from standard I/O modules and adapters easily.

Q3: Does orientation affect the output current of the 1734-EP24DC?
A3: Yes. In horizontal orientation, it provides up to 1.3 A at 19.2–28.8V input. In vertical orientation, POINTBus output current is rated at 1.0 A across the full 10–28.8V range.