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3

INSTALLATION AND OPERATION INSTRUCTIONS 

 

INTRODUCTION 

The PSR-2 is plug-in power supply unit for the SR-20 sub-rack frame. Utilizing state of the art, 
low noise, switching power supply technology, it allows up to 100 Watts of output power to be 
provided to the application cards. Over voltage and thermal protection are included in the unit. 
There are 

no

 user serviceable parts inside. Up to fourteen single or seven dual position plug in 

cards can be powered by the PSR-2  
 

LINE VOLTAGE 

For proper operation, the input line voltage should be in the range of 100 to 240 VAC, 50 - 60 
Hz, properly grounded and conforming to all local codes. A universal power connector is 
provided on the rear of the unit to facilitate connection to the power mains. 

 

 
 
INSTALLATION 

This installation should be made by a qualified service person 

and should conform to all local 

codes

. All wiring methods should be in accordance with the National Electric Code, ANSI/NFPA 

70. The unit slides in and is locked into place by four ¼ turn fasteners. The line cord is then 
plugged in from the rear. Be sure that the power switch is in the off (O) position before 
connecting the power source. 
 
The rear of the unit includes an exhaust fan. In order to insure long life and reliable operation, 
air-flow from the fan port should not be obstructed. 

 

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