Allen-Bradley 1734-EPAC POINT I/O Power Supply

1734-EPAC | Allen-Bradley Expansion Power Module 120-240V

Product Introduction

The Allen-Bradley 1734-EPAC is a POINT I/O Expansion Power Supply designed to transmit and manage field power within your I/O architecture. This module efficiently creates a functional partition between input and output devices, grouping modules according to specific tasks and helping organize your control system layout. Additionally, the 1734-EPAC supports between 4 and 17 I/O modules, depending on the DIN-rail location and the current draw of each connected device. For larger systems, you can use multiple units alongside POINT I/O adapters to build a complete and scalable solution. This module ensures reliable power distribution, making it an essential component for complex automation projects.

Key Technical Specifications

This power supply operates with a nominal input voltage of 120 to 240 Volts AC. It also accommodates a wide range from 85 to 264 Volts AC at 50 to 60 Hertz. The unit delivers a robust power supply current of 10 amps to field devices. Its inrush current is rated at 2 amps for 6 milliseconds, which protects sensitive components during startup.

Furthermore, the module features MOV and fuse-based overvoltage protection to safeguard your system from voltage spikes. The continuous isolation voltage is rated at 264 Volts, and it has been tested to withstand 3250 Volts DC for 60 seconds. Its maximum power consumption is 15.1 Watts, while power dissipation is rated at 8.4 Watts. Consequently, the thermal dissipation reaches 28.7 BTU/hour. Two green LED indicators are present on the faceplate. One shows the field power status, while the other indicates the 5 Volts of system power, providing clear visual feedback for troubleshooting.

Mechanical and Environmental Limits

Operating this unit within its specified limits ensures longevity and stable performance. The ambient temperature must remain between 0 and 55 degrees Celsius (32 to 131 degrees Fahrenheit). Moreover, the relative humidity should not exceed 95%, non-condensing. When installing the module, ensure proper ventilation around the unit to meet these environmental requirements. It is also certified with cULus, CE, and C-Tick approvals, confirming its compliance with international industrial standards.

Installation and Mounting Guide

The 1734-EPAC mounts directly onto a standard DIN-rail, allowing for quick and secure installation within your enclosure. It slides easily into the POINT I/O system, connecting through the backplane for seamless communication and power transfer. A key safety point is to always turn off field-side power before connecting or disconnecting any wiring. This practice prevents dangerous electrical arcing. Specifically, check the module's position on the rail, as its location affects how many modules it can support. For optimal performance, group your input modules separately from output modules to create a logical partition, thereby reducing electrical noise interference.

Packaging and Shipping Information

Each package contains the Allen-Bradley 1734-EPAC expansion power supply unit. It also includes the standard DIN-rail mounting hardware necessary for installation. For your convenience, all shipments are processed through leading global carriers such as FedEx, UPS, and DHL. This ensures your order arrives quickly and safely, no matter your location. The item is carefully packaged to prevent damage during transit. Please note that this listing is for the module and hardware only.

Frequently Asked Questions (FAQ)

1. Does this module provide system power or just field power?
The 1734-EPAC specifically transmits field power to I/O modules. It provides the 10 amp current necessary for field devices, while a separate indicator also shows the status of the 5V system power on the backplane.

2. How many modules can this power supply support at one time?
This unit can support 4 to 17 POINT I/O modules. However, the exact number depends on your specific DIN-rail position and the total current required by each module, as the 10-amp supply must be shared.

3. What protection features are built into this Allen-Bradley unit?
It includes robust overvoltage protection using a combination of MOVs and a fuse. This design effectively shields your connected I/O modules from dangerous voltage transients and short circuits.

4. Can I use multiple 1734-EPAC units in a single system?
Yes, you certainly can. Using multiple 1734-EPAC supplies with POINT I/O adapters allows you to assemble a larger, segmented system. This helps separate power zones for different functional areas.

5. What is the recommended procedure for wiring this module?
Always ensure that the field-side power is completely turned off before connecting or disconnecting any wires. Doing so prevents electrical arcs and ensures the safety of both the equipment and the technician.