Closed-loop thyristor current control
5-68
System- and communication configuring D7-SYS - SIMADYN D
Edition 06.2002
Connector X3 of the SE20.2 is directly connected to the SITOR interface
X7 of the ITDC expansion module.
The power section is connected via connectors X1 and X2.
The firing pulses are output with electrical isolation at connector SE20.2-
X1 and terminate in the SITOR cabinet at the pulse distribution (e.g.
6QM2200).
For bridges which are connected in parallel, the distribution is realized
within the SITOR cabinet.
The firing pulses are transferred together with a ground cable.
The shields are grounded at the SE20.2 and the pulse distribution and
can be separated at the pulse distribution.
The connector assignments can be taken from the User Manual "SITOR
interface SE20.2".
The actual values and monitoring signals are collected at the transfer
module of the SITOR cabinet from where they are transferred to
connector
SE20.2-X2
.
•
Shielding
(-X2: z2 and z26)
The shields are grounded at the SE20.2 and in the SITOR cabinet and
can be separated in the cabinet.
•
Voltage actual value
(-X2: b4 (+) , z4 (-) )
The output voltage is provided from a transducer (e.g. LEM electronic
PT), and supplies the actual value signal as analog DC voltage or
current signal. The actual value should be normalized at the load
resistor module -A1 (on the lefthand component side of the SE20.2).
The voltage actual value can also be fed from connector -X9 of the
interface module where it is connected to a load resistor.
If the voltage actual value is not used, then the input on the load
resistor module -A1 should be short-circuited (e.g. inserting a jumper
from R1+R2)
•
Temperature monitoring
(-X2: b8)
The SITOR cabinet does not have an actual temperature monitoring
function. However, temperature monitoring can be practically derived
from the "Fan failure" signal of the fan flow monitor. Temperature
monitoring is provided for air-water cooling systems.
When a fault condition develops, the input of the SE20.2 is open or
logical "0".
For disturbance-free operation, the input is kept at logical "1".
The supply for the NO contact of the airflow monitoring can be taken
from SE20.2 (external 24[V]).
If the signal is not used, it can be permanently connected to 2P24 or
can be suppressed in the closed-loop thyristor current control
(SOL.HWM bit3=0).
Connection
ITDC - SE20.2 -
6QG5xx
Firing pulses
Actual values and
monitoring
functions
