1746-P3 AB Allen-Bradley PLC Power Supply 1746 Series Original brand new

1746-P3 AB PLC Power Supply 1746 Series Original brand new

Power Supply Undervoltage Operation

SLC 500 controllers continue to operate (hold-up) for a short period of time if the input voltage to the power supply drops below the recommended operating voltage range. The controller continues to scan the user program and control I/O during this time. CPU hold-up for each power supply is shown on pages 14 and 16.SLC 500 controllers turn OFF (stop scanning and disable outputs) if input voltage to the power supply is removed or drops below the recommended operating range for a period exceeding the CPU hold-up time. The controller resumes operation automatically when the input voltage is restored to normal.

If the input voltage to the 1746-P7 power supply falls into a range of 4 to 9V for a period exceeding the CPU hold-up time, the controller turns OFF and will not turn back ON until input voltage is increased to 11V dc.

General Specifications (1746-P1, 1746-P2, 1746-P3, and 1746-P4)

Attribute	Value
	1746-P1	1746-P2	1746-P2	1746-P2
Line voltage	85...132/170...265V ac 47...63 Hz		19.2...28.8V dc	85...132/ 170...250V ac 47...63 Hz
Typical line power requirement	135VA	180VA	90VA	150VA
Inrush current, max	20A
Internal current capacity	2 A at 5V dc 0.46 A at 24V dc	5 A at 5V dc 0.96 A at 24V dc	3.6 A at 5V dc 0.87 A at 24V dc	10.0 A at 5V dc 2.88 A at 24V dc
Fuse protection	1746-F1 or equivalent	1746-F2 or equivalent	1746-F3 or equivalent	Fuse is soldered in place.
24V dc user-power current capacity	200 mA		Not applicable	1 A
24V dc user-power voltage range	18...30V dc			20.4...27.6V dc
User-supplied overcurrent protection, max	15 A		Not applicable	15 A
Temperature, ambient operating	0...60 °C (32...140 °F) Current capacity is derated 5% above 55 °C (131 °F).			0...60 °C (32...140 °F) no derating
Isolation	1800V ac RMS for 1 s		600V ac RMS for 1 s (version B or later)	2600V dc for 1 s
CPU hold-up time	20 ms (full load) 3000 ms (no load)		5 ms (full load) 1000 ms (no load)	20 ms (full load) 3000 ms (no load)