Ametek 1251RP Series, Руководство пользователя и программирования

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March 2011 RP Series
20
5.4. DC - DC Converter Module
The 385 VDC from the PFC is fed to the DC to DC module. It first supplies 385 volts DC to
the auxiliary power supply. When the auxiliary power supply starts, it supplies six isolated DC
supplies to the AC module. It also supplies 15 volts to the DC converter on the same DC
module. The DC to DC converter will then start operating. The DC converter supplies either
250 volts DC or 400 volts DC to the DC to AC module.
The DC to DC converter is a full bridge converter and the auxiliary converter is a two FET
forward converter.
All the eight LEDs on the DC-DC board should be lit under normal operation. The LED
DS200 is lit when the DC output is up and within regulation. The amber LEDs DS5, DS4 and
DS3 indicate that the 15V power to the optocouplers on the AC converters is within
regulation. The red and green LED‟s, DS7 and DS6 indicate logic power to the AC converter
is ok. The red LED DS8 indicates that logic power to the DC converter is within specification
at 15 volts. The LED DS2 shows that 24 volt fan power is available.
Table 1: Logic Board LED's
LED# FUNCTION COMMENTS
DS2 24V ok 24 volt fan power is available.
DS3 15V ok 15V power to the optocouplers on the AC converters is within
regulation
DS4 15V ok 15V power to the optocouplers on the AC converters is within
regulation
DS5 15V ok 15V power to the optocouplers on the AC converters is within
regulation
DS6 power ok logic power is ok to the AC converter
DS7 power ok logic power is ok to the AC converter
DS8 power ok logic power is ok to the DC converter
DS200 DC bus ok DC output is up and within regulation
5.5.