Description
Description
The Allen-Bradley 1746-P3 is a dedicated DC system power supply unit engineered for the SLC 500 controller series. This module is specifically designed to accept a 24V DC input, providing a reliable solution for applications where AC power is unavailable or unsuitable, such as remote solar installations, mobile machinery, or facilities utilizing a centralized 24V DC power architecture. It mounts directly into the SLC 500 chassis to deliver regulated backplane power to the processor and connected I/O modules.
Features
- Designed for 24V DC input environments with an operating range of 19.2 to 28.8V DC.
- Provides 3.6A at 5V DC and 0.87A at 24V DC to the system backplane.
- Features 600V AC RMS isolation voltage to enhance resilience against electrical noise.
- Includes a user-replaceable 1746-F3 fuse for internal overcurrent protection.
- Maintains system operation through minor power transients with a 5ms hold-up time.
Technical Specifications
| Brand |
Allen-Bradley |
| Series |
SLC 500 |
| Input Voltage |
24V DC (19.2–28.8V DC range) |
| Output 1 |
3.6A @ 5V DC |
| Output 2 |
0.87A @ 24V DC |
| Input Power |
61 Watts |
| Max Inrush Current |
20.0 Amps |
| Operating Temperature |
0 to 60 degC |
| Weight |
0.60 kg |
Installation Guidelines
- The 1746-P3 must be installed in the far-left slot of the 1746 chassis.
- Ensure the chassis power is disconnected before installing or removing the power supply module.
- Verify that the input voltage source is within the specified 19.2–28.8V DC range to prevent damage.
- Maintain adequate clearance around the module to facilitate natural convection cooling.
- Use appropriate wire gauges for the DC input terminals and ensure all connections are securely tightened to prevent voltage drops.
- Follow standard ESD precautions when handling the module to protect internal components.
FAQ
Q: Can I use this power supply with an AC input?
A: No, the 1746-P3 is strictly designed for a 24V DC input. Using an AC source will damage the unit.
Q: Where is this module installed in the rack?
A: This power supply is designed to be installed in the far-left slot of the SLC 500 chassis.
Q: Is the fuse replaceable?
A: Yes, the 1746-P3 utilizes a 1746-F3 fuse which can be replaced if the module experiences an overcurrent event.
