Product Overview
The Allen-Bradley 1734-EPAC is a POINT I/O Expansion Power Supply designed to transmit field power to I/O modules and create logical partitions between input and output sections. It supports 4 to 17 I/O modules, depending on DIN-rail position and current requirements. This module is essential for building scalable, organized control systems.
Key Features & Benefits
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Field Power: Accepts 120 or 240 Volts AC, providing flexible integration with global power standards.
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Inrush Current: Handles 2 amps for 6 milliseconds, ensuring reliable startup even with capacitive loads.
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Protection: Includes MOV and fuse overvoltage protection to safeguard connected modules.
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Power Supply Current: Delivers 10 amps to support multiple I/O modules.
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Efficient Operation: Consumes only 15.1 Watts with 8.4 Watts dissipation, minimizing heat buildup.
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Isolation: Provides 264 Volts continuous isolation voltage for safe separation.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1734-EPAC |
| Series |
POINT I/O |
| Module Type |
Expansion Power Supply |
| Field Power |
120 or 240 Volts AC |
| Inrush Current |
2 amps for 6 milliseconds |
| Overvoltage Protection |
MOV and Fuse |
| Power Consumption |
15.1 Watts |
| Power Supply Current |
10 amps |
| Isolation Voltage |
264 Volts Continuous |
| Power Dissipation |
8.4 Watts |
| Thermal Dissipation |
28.7 BTU/hour |
Applications
The 1734-EPAC is ideal for manufacturing lines, process control, and material handling systems where distributed I/O is required. For example, in a packaging line, it powers sensors and actuators while isolating input and output circuits to prevent noise interference. Its ability to support up to 17 modules makes it suitable for medium-sized control cabinets, and multiple units can be combined with POINT I/O adapters to build larger systems.
Installation & Setup
Mount the 1734-EPAC on a DIN rail in a clean, dry enclosure. Ensure field power is disconnected before wiring to avoid electrical arcs. Connect the AC field power to the designated terminals, observing polarity and torque specifications. Use the green status indicators to verify field power and 5V system power after energizing. Follow the POINT I/O wiring guidelines for proper grounding and shielding.
Maintenance & Reliability
Regularly inspect the module for dust accumulation and check that all connections remain tight. The operating temperature should not exceed 55°C (131°F) and relative humidity must stay below 95% noncondensing. Because the unit includes MOV and fuse protection, replace the fuse only with the same rating if it blows, and verify the MOV has not degraded after a surge event. Preventive checks every 6 months help extend service life.
Compatibility & Integration
The 1734-EPAC is part of the POINT I/O family and works with Allen-Bradley 1734-EPAC and compatible POINT I/O adapters and modules. It integrates seamlessly with Rockwell Automation control platforms, including CompactLogix and ControlLogix systems, through the POINT I/O backplane. The expansion power supply is also compliant with cULus, CE, and C-Tick certifications, ensuring broad acceptance.
Purchasing Guide
Before ordering, confirm your system voltage (120 or 240 VAC) and calculate the total current draw of your I/O modules to ensure the 10A supply is sufficient. Verify the DIN-rail length and module count. PLC Source PRO offers genuine Allen-Bradley 1734-EPAC modules with fast shipping and competitive pricing. Contact our team for bulk discounts or technical support.