Allen-Bradley 1734-EP24DC Overview
The Allen-Bradley 1734-EP24DC is an expansion power supply module designed for the POINT I/O system. It extends the backplane bus power to up to 17 I/O modules installed on the right side of the supply. This module also creates a new field voltage partition segment for field devices, separating field power from the I/O module to the left. Its dark gray color enables easy visual identification during installation or maintenance.
This expansion unit is compatible with any 1734 POINT I/O adapter, allowing you to assemble a complete system. The module passes 24V DC electric field power to the I/O modules on the right, ensuring reliable operation. It supports both horizontal and vertical mounting orientations, following the POINT I/O system layout.
Technical Specifications and Performance
The 1734-EP24DC accepts an input voltage rating of 24V DC nominal, with a range of 10 to 28.8V DC. It provides a POINTBus output current of 1 A at 10-19.2V input and 1.3 A at 19.2-28.8V input for horizontal mounting. For vertical mounting, it delivers 1 A at 10-28.8V input. The module has a maximum power consumption of 9.8 Watts at 28.8V DC and a power dissipation of 3.0 Watts. Thermal dissipation is rated at 10 BTU/hour.
Key electrical characteristics include an inrush current of 6 amps for 10 milliseconds, overvoltage protection with reverse polarity, and a power supply current of 10 amps. The isolation voltage is 50 Volts continuous. The module operates within a temperature range of -13 to 140 degrees Fahrenheit, and nonoperating temperature from -40 to 185 degrees Fahrenheit, with relative humidity of 5-95% without condensation. It withstands operating vibration of 5g at 10-500 Hz and operating shock of 30g.
Installation and Compatibility
You can install the 1734-EP24DC with any 1734 POINT I/O adapter. It supports installation of four to seventeen POINT I/O modules, depending on the current rating of each module. The module includes built-in status indicators for field power and 5V system power. It also features integral input overvoltage protection, specifically reverse polarity protection.
When the input supply voltage drops out for 10 ms at 10V maximum load, the output voltage stays within specification, ensuring system stability. The module's compact design and straightforward mounting options make it a practical choice for expanding POINT I/O systems.
Practical Value for Automation Engineers
For engineers designing or expanding POINT I/O systems, the 1734-EP24DC offers a reliable way to extend bus power and create separate field power segments. Its wide input voltage range and robust environmental ratings make it suitable for industrial environments. The clear status indicators simplify troubleshooting, while the reverse polarity protection adds a layer of safety.
Overall, the Allen-Bradley 1734-EP24DC delivers the essential functionality needed to scale your automation architecture. Its compatibility with existing 1734 adapters ensures seamless integration, and its performance specifications meet the demands of typical industrial applications. Whether you are upgrading a current system or building a new one, this expansion power supply is a dependable component.