Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 191

6 Infeed Modules
6.7 DC link options
Charge times
Discharge times
Discharge voltage
!
6-190
Before performing any commissioning or service work, check that the DC link is
safely disconnected from the power supply.
Table 6-20 Charge/discharge times, discharge voltage
Capacitor The charge time
module depends on the
total DC link
capacitance
2.8 mF/4.1 mF As for the
power modules
20 mF approx. 2 min
If there is a pulsed resistor in the system, in order to reduce the discharge time
after opening terminal 48, the DC link can be quickly discharged via terminals
X221:19 and 50 (jumpers). In this case, the electronics power supply must be
implemented using a 3–phase line supply connection; this is not disconnected
while discharging.
Note
Discharge through a pulsed resistor is not possible for a 5 kW UI!
Warning
The pulsed resistor modules can only convert a certain amount of energy into
heat (refer to Table 6-24). The energy available to be converted depends on
the voltage.
A monitoring function protects the resistance against overload. If this responds,
then no additional energy is converted into heat in the resistor.
Caution
In order to avoid damage to the infeed circuit of the NE modules, when
controlling/energizing terminal X221 T.19/50, it should be ensured that terminal
48 of the NE module is deenergized (the module is electrically isolated from the
line supply).
The feedback signal contacts of the main contactor of the NE module must be
evaluated to check whether the contactor has actually dropped out (X161
terminal 111, terminal 113 and terminal 213).
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
The discharge time depends on the total DC
link capacitance to 60 V of the DC link voltage
at 750 V DC
approx. 30 min
approx. 30 min
© Siemens AG 2012 All Rights Reserved
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