American Power Conversion AP9621 User Manual

7 

 

Figure 2:  AP9621 
 

 

 

 

 

 

 

Rail Cleats 

:  Two cleats (one on each side) of   

the Step-Down Transformer engage with the rack 
mounting rails to secure in the equipment rack. 

Mounting Flanges 

:  Two mounting flanges  

(Figure 2 and 4) secure the Step-Down Transformer 
in the rack. 
Front Bezel 

:  A bezel covers the front of the Step-

Down Transformer. The bezel is removed during the 
installation for the SUTF3, SYTF2, SYTF2J, SYTF3 
and SYTF3J models. 
Fans 

:  Two fans on the front of the Step-Down 

transformer circulate airflow and cool the unit. The 
redundant fan will not operate unless the internal 
temperature of the unit becomes 100 °F or failure of 
the main cooling fan.  
 
 

 

Input Wiring 

:  Provides access to wiring terminal 

blocks for hard wiring the input (see Figure 6). 
Provided with an input cord for use in many 
applications (see Figure 7). 

Input Circuit Breaker 

:  The input circuit breaker 

protects the product and load equipment from 
extreme overloads. 
Power Distribution Unit (PDU) 

:  Power 

distribution receptacles for connecting load 
equipment.