Bosch Rexroth IndraDrive Mi Project Planning Manual page 47

Project Planning Manual | Rexroth IndraDrive Mi
Control Voltage Block Diagram
HCS, HMS, HMD
Overvoltage
Overvoltage greater than 33 V has to be discharged by means of
the appropriate electrical equipment of the machine or installation.
This includes:
● 24V power supply units that reduce incoming overvoltage to
the allowed value.
● Overvoltage limiters at the control cabinet input that limit ex‐
isting overvoltage to the allowed value. This, too, applies to
long 24V lines that have been run in parallel to power cables
and mains cables and can absorb overvoltage by inductive or
capacitive coupling.
Power supply units with buffer (UPS)
For HMV supply units, use 24 V supplies with buffer times of at least
100 ms (e.g. UPS), if commutation drops and short-time interrup‐
tions in the application exceed the specified values.
For the 24V supply, also take the following chapter into account:
"Project Planning of Mains Connection" in the Project Planning
Manual "Rexroth IndraDrive, Drive System".
Insulation monitoring impossible
The input 0 V is connected in conductive form with the housing po‐
tential. Insulation monitoring at +24 V and 0 V against housing is
impossible.
The control voltage, which is supplied via the connection for 24V supply, takes
effect according to the following block diagram.
BR circuit for brake control
LT power section, e.g. HCS02
ST control section, e.g CSB01
ZK DC bus
int. SMPS internal switching power supply unit, for types HCS0x.1E-Wxxxx-NxxV
Fig.4-15: Block diagram of internal control voltage
Electric Drives | Bosch Rexroth AG
and Controls
General Specifications of the Components
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