Power-off - discharge time of DC bus reduced (from HW 1A and V1.3.8)

Function extension:
The discharge time of the DC voltage has now been significantly reduced to 5 minutes. Previously, a discharge time of '30 min' was indicated at the front of the device, now '5 min' is indicated.
After switching off the mains, the DC voltage at the DC-bus terminals is reduced much faster to a value uncritical to persons.

i700, smaller devices (width 50 mm):
Without changing the hardware, for these devices, a fast discharge of the DC bus is already ensured.
The symmetry resistors switched in parallel to the DC bus electrolytic capacitors ensure a short discharge time of less than 5 minutes. 

i700, bigger devices (width 100 mm):
After changing the hardware, the symmetry resistors already available are now used for a faster discharge of the DC bus electrolytic capacitors.
The resistors are now automatically activated when the controller is not enabled. This is controlled via the controller firmware.
For this reason, both a certain controller hardware and firmware version must be used to ensure that this functionality will be available, see below. 

Intrinsic consumption:
For both device sizes, the symmetry resistors have a resistance of 160 kOhm. The additional intrinsic consumption of the devices amounts to approximately 2 W (560 V, 160 kOhm).
For smaller devices the intrinsic consumption occurs during the entire power-on time. For big devices, only when the device is inhibited.

Contained in which products:
- i700 servo inverter from HW 1A   AND
- i700 servo inverter from V01.03.08.9047
  (both are required) 

Application:
Servicing, device replacement 
 

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201400042/1/
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