Operating manual 810378-BAL-EN-170330
Mach/30 2017
Page 25 of 54
7.2. Generation of high voltage
The high voltage generator is controlled via the bus interface.
After switching on high voltage it moves into a programmable start up ramp to the tar-
get value U or until target value I is reached.
The actual voltage and current values can be read out from the bus system.
For a detailed description of all parameters, results and status information, see the fol-
lowing section "Field-Bus interface specification".
7.3. Switching on high voltage
When switching on high voltage the power supply of the HV generator (24 V DRIVE)
must be on. Switch on is then done via the bus system
7.4.
Switching off high voltage
The high voltage can be switched off at any time via the bus system.
WARNING
To release access to high voltage carrying parts, additionally:
The power supply of the HV generator (24V DRIVE)
must be safely disconnected and secured against
switching back on.
Monitoring contact of the HV generator must be closed.
The specifications for secure access to the spray zone
listed in Section 3 must be fulfilled.
7.5.
Voltage and current control
The smart-E 310 or 510 has voltage and current control. These can be set using the
following parameters:
a) U target
Target value for high voltage 10-100 kV
b) I Limit
Target value for current limiting 10-300 µA
(only active if I Limit is set below I max)
c) I max
Target value for the overcurrent switch off threshold 10-300 µA
(also active, if I Limit is set lower than I max, however only for a very fast
current change such as during an electrical arc)
d) U min
Target value for the switch off threshold minimum voltage. 10-100 kV
(Safety shutdown if current limiting is active)
