Optimize Your POINT I/O System with the 1734-EP24DC Expansion Power Supply
When building a scalable industrial control system, reliable power distribution is critical. The Allen-Bradley 1734-EP24DC, part of the POINT I/O series from Rockwell Automation, serves as an expansion power supply that ensures your I/O modules receive consistent, isolated power. This component is designed to extend the backplane bus power to up to 17 modules on the right side of the supply, creating a new field voltage partition for field devices. Its dark gray housing allows for quick visual identification during installation and maintenance.
Technical Specifications Breakdown
Key parameters for the 1734-EP24DC are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Series | POINT I/O |
| Module Type | Expansion Power Supply |
| Field Power | 24 Volts DC |
| Power Supply Current | 10 amps |
| Power Consumption | 9.8 Watts |
| Power Dissipation | 3 Watts |
| Thermal Dissipation | 10 BTU/hour |
| Isolation Voltage | 50 Volts Continuous |
| Inrush Current | 6 amps for 10 milliseconds |
| Overvoltage Protection | Reverse Polarity |
| Mounting | Horizontal / Vertical |
| POINTBus Output Current (Horizontal) | 1 A @ 10…19.2V input; 1.3 A @ 19.2…28.8V input |
| POINTBus Output Current (Vertical) | 1 A @ 10…28.8V input |
Industry Applications
This expansion power supply is ideal for manufacturing lines, process control skids, and material handling systems where distributed I/O is required. For example, in a packaging line, the 1734-EP24DC can power multiple POINT I/O modules monitoring sensors and actuators, ensuring that each module receives clean, regulated power. By isolating field power from the left-side I/O modules, it prevents ground loops and improves signal integrity. This design reduces downtime caused by power-related faults, directly improving operational ROI.
Installation & Setup Guidance
Mount the 1734-EP24DC horizontally or vertically on a DIN rail, following the orientation of your POINT I/O system. Ensure the input voltage is within the 10-28.8VDC range (nominal 24VDC). The module supports installation of 4 to 17 POINT I/O modules on its right side, depending on the current draw of each module. For horizontal mounting, the POINTBus output current is 1 A at 10-19.2V input and 1.3 A at 19.2-28.8V input. For vertical mounting, it provides 1 A across the full 10-28.8V input range. Always verify that the total current draw of connected modules does not exceed these limits.
Maintenance & Reliability
Periodically inspect the module for dust accumulation and ensure proper ventilation. The 1734-EP24DC includes reverse polarity protection to guard against wiring errors. No routine calibration is required. Check the field power status indicator and 5V system power indicator during startup to confirm normal operation.
Compatibility & Integration
This expansion power supply is compatible with all 1734 POINT I/O adapters. It integrates seamlessly into existing Rockwell Automation architectures, allowing you to expand your system without replacing existing hardware.
Selection Guide & Purchasing Advice
When selecting an expansion power supply, consider your module count and mounting orientation. The 1734-EP24DC is a cost-effective solution for extending POINTBus power. Contact SpareTechPLC for current lifecycle status and availability before ordering.
Troubleshooting & Common Issues
If modules on the right side fail to power up, verify that the input voltage is within 10-28.8VDC and that the total POINTBus current does not exceed the rated output. Check the reverse polarity protection if the module does not start. Ensure the mounting orientation matches the specified output current ratings.
