ABB DCS550 Series, Manual

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Electrical installation
3ADW000379R0501 DCS550 Manual e e
④
Auxiliary transformer (T2) for converter electronics and fan
The converter module requires various auxiliary voltages, e.g. the module’s electronics and cooling fans
requires either a single-phase supply of 115 V
AC
or 230 V
AC
. The auxiliary transformer (T2) is designed to
supply the module’s electronics and cooling fans.
⑤
Start, Stop and E-stop control
The relay logic is splitted into three parts:
1. Generation of On / Off and Start / Stop commands:
The commands represented by K20 and K21
(latching interface relay) can also be generated by
a PLC and transferred to the terminals of the
converter either by relays, using galvanic isolation
or directly via 24 V signals. There is no need to
use hardwired signals. Transfer these commands
via serial communication. Even a mixed solution
can be realized by selecting different possibilities
for the one or the other signal (see parameter
group 11).
2. Generation of control and monitoring signals:
Control the main contactor K1 for the armature circuit by the dry contact of DO8 located on the
SDCS-PIN-F. The status of motor (K6) and converter (K8) fans can be monitored by means of MotFanAck
(10.06).
3. Off2 (Coast Stop) and Off3 (E-stop):
Beside On / Off and Start / Stop the drive is equipped with two additional stop functions Off2 (Coast Stop)
and Off3 (E-stop) according to Profibus standard. Off3 (E-stop) is scalable via E StopMode (21.04) to
perform stop category 1. Connect this function to the E-stop push button without any time delay. In case of
E StopMode (21.04) = RampStop the K15 timer relay must be set longer than E StopRamp (22.04). For E
StopMode (21.04) = Coast the drive opens the main contactor immediately.
Off2 (Coast Stop) switches the DC current off as fast as possible and prepares the drive to open the main
contactor or drop the mains supply. For a normal DC motor load the time to force the DC current to zero is
below 20 ms. This function should be connected to all signals and safety functions opening the main
contactor. This function is important for 4-Q drives. Do not open main contactor during regenerative
current. The correct sequence is:
1. switch off regenerative current,
2. then open the main contactor.
In case the E-stop push button is hit, the
information is transferred to the converter
via DI5. In case E StopMode (21.04) =
RampStop or TorqueLimit the converter
will decelerate the motor and then open
the main contactor. If the drive has not
finished the function within the K15 timer
setting, the drive must get the command to
switch off the current via K16. After the
K16 timer has elapsed, the main contactor
is opened immediately, independent of the
drive’s status.
K16
K15 K16
K15
DI4
K15
X6:9
SDCS-CON-4
S1
1
2
SF_CON4_001_E-stop_a.ai
E-Stop
electrical
disconnect
(coast)
Block
current
command
DZ_LIN_006_E-stop_ b.ai
E-stop
Speed
Block current control
Main contactor K1
E-stop ramp Coast
Timer K15
Timer K16