Allen Bradley1771P4SPower Supply Module, 120/220 V AC Input, 5 V DC 8 A Output, 1771 I/O Chassis Slot

Product Description

What this part is

Allen-Bradley 1771-P4S power supply module for the 1771 universal I/O chassis. Product Type: slot-mounted backplane power supply. Input Voltage: 97 to 132 V AC rms, or 195 to 264 V AC rms. Input Frequency: 47 to 63 Hz. Output Voltage: 5 V DC. Output Current: 8 A. Real Power: 59 W. Apparent Power: 89 VA. Mounting Type: 1771 I/O chassis slot. Unit Quantity: 1 Pc. GTIN: 662468206044.

Decoding the designation

1771 — the Allen-Bradley 1771 I/O platform, the rack-based I/O family served by PLC-2, PLC-3 and PLC-5 processors.

P — the power supply group within that platform.

4S — the 8 A slot-mounted execution, which occupies a chassis slot instead of bolting to the outside of the rack.

Electrical data

Input Voltage: 97 to 132 V AC rms, or 195 to 264 V AC rms. Input Frequency: 47 to 63 Hz. Nameplate Input Current: 0.9 A at 120 V AC, 50/60 Hz. Output Voltage: 5 V DC. Output Current: 8 A. Real Power: 59 W. Apparent Power: 89 VA. Fuse: 1.5 A, 250 V, slow-blow.

What these specs mean in practice

Output Current: 8 A at 5 V DC. That is the backplane budget every module in the chassis draws against, and it is the single number that decides how many intelligent modules a rack will carry — a 1.3 A ASCII module takes a sixth of it on its own.

Input Voltage: 97 to 132 V AC rms, or 195 to 264 V AC rms. One catalogue number covers North American 120 V and 230 V plant supplies, selected at the module.

Input Frequency: 47 to 63 Hz. The band spans 50 Hz and 60 Hz mains, so the same supply serves export machinery.

Mounting Type: chassis slot. A slot-mounted supply keeps the enclosure envelope down compared with an external supply bolted alongside the rack, at the cost of one I/O position.

Chassis compatibility

Chassis: 1771-A1B, 1771-A2B, 1771-A3B and 1771-A4B universal I/O chassis. Supplies per Chassis: up to two, sized against the total backplane current drawn by the modules fitted. Running two supplies in one chassis doubles the available 5 V DC budget to 16 A.

Quantity and configuration

Unit Quantity: 1 Pc. One power supply module.

Interchange guidance

Manufacturer Status: discontinued. Part Number: 1771-P4S. GTIN: 662468206044. MPN Variants: 1771P4S, 1771 P4S. The 1771-P4S1 is the same 8 A slot supply with the redundancy provision, and the 1771-P7 is the external 16 A supply that bolts to the chassis rather than filling a slot. Series A and Series B of the 1771-P4S share the 5 V DC 8 A output and the same chassis slot.