Emerson MPR15 Series - Manual (Page 24)

24 Operation
UM5C06B / C ( 169-2071-500 ) P0711722 Standard 10.00 May 2001
Test points (V+, V-)
Test points allow the user to measure the voltage at the point of regulation,
whether the DC breaker is ON or OFF. A 10 K resistor is placed in series
with the –48 V lead to prevent short circuits at the jack terminals.
Current meter
A three-digit output current meter, available on the enhanced model, reads
the output shunt and displays the value using an integrated logic circuit.
Fan filter option
A fan filter option is available for dusty environments to prevent the dust
particles from entering and deteriorating the cooling efficiency of the
rectifier. (See the “Recommended Replacement Parts” section to order an air
filter kit.)
The maximum operating ambient temperature should be limited to 50°C
(122°F) for environments requiring the rectifier air filter.
Rear interface
Figure 2 - Rear interface
Fan cooling assembly
The fan cooling assembly ensures adequate cooling of the internal
components. This assembly can be replaced in the field. Consult the “Fan
Replacement Procedure” section for details.