The Allen-Bradley 1734-EP24DC is an expansion power supply module for the POINT I/O system. It extends the backplane power bus to support an additional 4 to 17 I/O modules beyond the adapter's native capacity, splitting the field power domain into a new segment for isolated power groups. The module accepts a 10-28.8V DC input and delivers up to 1.3A on the POINTBus at 5V, with 9.8W total consumption. With built-in reverse polarity protection and operating range from -25°C to 60°C, it is widely used in larger distributed I/O installations where one adapter must serve many modules, or where separate power zones are needed for safety or noise isolation. Typical applications include material handling systems, water treatment plants, and automotive assembly lines.
Frequently Asked Questions
Q: When do I need a 1734-EP24DC expansion power module?
A: When your POINT I/O assembly exceeds the adapter's maximum bus current or contains more than 17 modules, an expansion power supply creates a new power segment for additional modules.
Q: How many additional modules can a 1734-EP24DC support?
A: Between 4 and 17 additional POINT I/O modules, depending on their individual current consumption.
Q: What input voltage does it accept?
A: 10 to 28.8V DC, with a nominal 24V DC rating.
Q: Where should the 1734-EP24DC be placed in the rack?
A: It is installed directly in the POINT I/O module assembly, creating a new field power partition to the right of its position.
Q: Does it also pass communication data?
A: No. The 1734-EP24DC is a power-only module. The POINTBus data backplane passes through seamlessly.
Q: What is the operating temperature range?
A: -25°C to 60°C (-13°F to 140°F), wider than many standard POINT I/O modules.
