The Allen Bradley PLC Logic Power Supplies 1746-P4 is a high-performance power supply unit designed for use in programmable logic controllers (PLCs). This reliable and efficient power supply provides a stable AC voltage to the entire system, ensuring consistent and precise operation of all connected components.
The 1746-P4 is an SLC 500 power supply module that provides backplane power to a local chassis, expansion module, or remote I/O chassis. By providing backplane power, the modules attached to the chassis slot become operable and capable of being recognized by the SLC processor.
Here are the technical specifications for the Allen Bradley PLC Logic Power Supplies 1746-P4:
- Input Voltage: 120-220V AC
- Line Voltage: 85-132/170-250V AC
- Input Frequency: 47-63 Hz
- Maximum Inrush Current: 45A
- Current Capacity: 10A at 5V DC, 2.88A at 24V DC
- Maximum Overcurrent Protection: 15A
- Output Voltage: 24V DC
- Relative Humidity: 5-95%, Noncondensing
- Pollution Degree: 2
- Altitude: Up to 2000m above sea level
- Weight: 1.4kg
- Dimensions: 110 x 145 x 140 mm (4.33 x 5.70 x 5.51 in)
It is provided with a 24VDC output that may be used to power external devices. And comes with a soldering fuse.
It is not recommended to use this 24VDC output as supply for output modules. Doing so will make troubleshooting difficult to perform even for a single module as the system power supply will have to be shut off first which means the entire SLC 500 controller rack will have to be stopped.
The 1746-P4 has an isolation of 2600 Volts DC for 1 second and a CPU hold-up time of 20 milliseconds at full load and 3000 milliseconds at no load.
As of note, the SLC 500 Power Supplies have a hold-up mode. These power supplies operate in hold-up mode for a short time when the input voltage of the power supply drops below the recommended voltage range for operation, or in other terms, if the power supply is under voltage. This power supply line will turn off if the input voltage is dropped or removed from the power supply and automatically resumes once the input voltage is restored. Additionally, the CPU hold-up time for this power supply at full load is twenty milliseconds (20 ms) and three thousand milliseconds (3000 ms) for no load. The Allen-Bradley 1746-P4 may also, in its life, have an overcurrent condition. In the event that the 1746-P4 goes into an overcurrent condition, the power supply of the device will shut down and there will be a CPU fault. In order to fix this problem, all one needs to do is reload the user program, and the device is ready to go again.
This power supply is UL Listed as Industrial Control Equipment and certified for CSA Certified Process Control Equipment for Class 1, Div 2, Groups A, B, C, D Hazardous Locations.