Emerson MPR15 Series, MPR25 Test points V+, Current meter, Fan filter option, Rear interface

24 Operation

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.

UM5C06B / C ( 169-2071-500 ) P0711722 Standard 10.00 May 2001