The A-B 1756-PA75 is a standard power supply module of the ControlLogix series from Allen-Bradley(now part of Rockwell Automation).The following is a detailed introduction to the module:

1.Basic features

Model:1756-PA75

Brand:Allen-Bradley(A-B)

Series:ControlLogix

Input voltage:85264VAC(frequency is 4763Hz),nominal input voltage is 120VAC/240VAC

Output voltage and current:Provides a variety of output voltage and current combinations,such as 3A current capacity at 4.3VDC,1A at 13.5VDC,and 8.24A at 2V DC(specific parameters may vary depending on product versions)

Rated output power:The rated output power within a specific temperature range(such as 0+60°C,+32+140°F)is 75W(some say 140W,which may depend on the specific product configuration and working environment)

2.Main functions

Provide backplane power:The main purpose of this module is to provide the necessary backplane power for each module installed on the ControlLogix chassis,so that the module can enter the working state.

High-speed communication interface:Although it is mainly used as a power module,it may also have a communication interface for fast and reliable data exchange with servo motor drives(note that this function may vary depending on the specific product and not all 1756-PA75 modules have it).

Strong compatibility:Compatible with various ControlLogix chassis,such as 1756-A4,1756-A7,1756-A10,1756-A13,1756-A17,etc.,especially B series and C series chassis.

Power retention time:When the working input power is suddenly interrupted,this standard power supply can provide a certain period of retention time,such as 2 cycles at 85V AC,6 cycles at 60 Hz at 120V AC,and 20 cycles at 60 Hz at 220V AC(the specific retention time may vary depending on the product).

3.Installation and maintenance

Installation location:The module must be installed on the leftmost dedicated power slot of the ControlLogix chassis.

External power supply:An external power supply must be provided for the 1756-PA75 to operate.

Non-replaceable fuse:The module has a non-replaceable fuse designed to prevent fire hazards caused by short circuits.

IV.Application Environment

Industrial Environment:Suitable for industrial environments with pollution degree 2 and excessive Class II applications(as defined in IEC 60664-1 publication).

Altitude limit:Can operate at altitudes up to 2000 meters without derating.

 

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