ABB DCS550 - Page 46

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Electronic board details
3ADW000379R0501 DCS550 Manual e e
Location
The SDCS-PIN-F is located between the power part and the control board SDCS-CON-F.
Functions
The DCS550 provides an automatic adjustment for current and voltage measurement, burden resistor settings
and 2-Q or 4-Q operation by means of setting parameters in the firmware. The SDCS-PIN-F provides:
− the power supply for all the auxiliary voltages of the whole drive and the connected options,
− control of armature bridge including high ohmic measurement of DC- and AC voltage and an interface for
the current transformer measuring the armature current,
− control of the integrated field exciter and field current measurement,
− an interface for the heatsink temperature measurement with a PTC resistor,
− a snubber circuit for thyristor protection together with the snubber resistor mounted on the heatsink.
Terminal description
− The integrated field exciter with firing pulse transformers and field current measurement via transformer
T100 is located on the SDCS-PIN-F. The power part is a three phase half-controlled bridge supplied from
the mains U1, V1, W1 via fuses F100, F101, F102 and is located on the heat sink.
The measurement of the field current is automatically scaled and selected by the firmware. Deselect a not
needed integrated field exciter by means of the firmware.
− Connector X96 controls the main circuit breaker. To save an additional relay in the cabinet the DCS550
provides a normally open relay contact integrated on the SDCS-PIN-F. Digital output 8 controls the relay
output at connector X96. The function or signal definition of digital output 8 is done in the firmware by
means of parameters.
Isolated relay with a normally open contact
Contact ratings:
−
230 V~ / <3 A~
−
24 V- / <3 A- or 115 / 230 V- / <0.3 A-
− Use connector X99 to connect the auxiliary input voltages of 230 V
AC
, 115 V
AC
or 230 V
DC
.
X99 features a hardware filter and a voltage limitation.
Auxiliary voltages
115 V
AC
230 V
AC
230 V
DC
Tolerance
-15 % / +10 %
-15 % / +10 %
-15 % / +10 %
Frequency
45 Hz to 65 Hz
45 Hz to 65 Hz
Power consumption
120 VA
120 VA
Power loss
d 60 W
d 60 W
d 60 W
Inrush current
*20 A / 20 ms
10 A / 20 ms
10 A / 20 ms
recommended fusing
6 AT
6 AT
6 AT
Mains buffering
min 30 ms
min 300 ms
150 ms
Power fail
< 95 V
AC
< 95 V
AC
< 140 V
DC
X96:
X99:
SF_PINF_001_in-output_a.ai
3.15 AT
R300
NTC
ϑ
U
R310
F302