3.3.8 Specific Card Connections
Connector FK102, terminals 104, 105 and 106 located on
the power cards, provide for the connection of an external
temperature switch. The input could be used to monitor
the temperature of an external brake resistor. Two input
configurations are possible. A normally closed switch may
be connected between terminals 104 and 106 or a
normally open switch between terminals 104 and 105.
Should the input change states, the frequency converter
would trip on an Alarm 27,
Brake Chopper Fault
. The input
SCRs would also be disabled to prevent further energy
from being supplied to the DC bus. If no such input is
used, or the normally open configuration is selected, a
jumper must be installed between terminals 104 and 106.
Connector FK103, terminals 100, 101, 102, and 103 located
on the power cards, provide for the connection of mains
voltage to allow powering the AC cooling fans from an
external source. This is required when the frequency
converter is used in a load sharing application where no
AC power is provided to the main input terminals. To
make use of this provision, the jumpers would be removed
from terminals 100 and 102, 101 and 103. The auxiliary
mains voltage power supply would be connected to
terminals 100 and 101.
The power card MK112, terminals 1, 2, and 3, and 4, 5, and
6 provide access to two auxiliary relays. The relays are
wired to a terminal mounted in the inverter cabinet above
the MDCIC. These are form C sets of contacts, meaning
one normally open and one normally closed contact on a
single throw. The contacts are rated for a maximum of 240
VAC, 2 Amps and a minimum of 24 VDC, 10 mA or 24 VAC,
100 mA. The relay can be programmed via
5-40 Function
Relay
to indicate frequency converter status.
Terminal positions on the power card labelled MK400 and
MK103 are reserved for future use.
Internal Frequency Converte...
High Power Service Manual for Modular F Frame Drives
58
MG90K202 - VLT
®
is a registered Danfoss trademark
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