Bosch Rexroth IndraDrive HMV Project Planning Manual page 34

24/369 Bosch Rexroth AG | Electric Drives
General Specifications of the Devices
Description
control voltage for drive systems without
operation of motor holding brakes in Re‐
xroth motors
control voltage for drive systems with op‐
eration of motor holding brakes in Rexroth
motors
external control voltage at devices of de‐
sign "NNNV"
(see type code HCS02, HCS03; other de‐
sign:
DC 24 V power supply from the DC bus or
external)
max. ripple content
maximum allowed overvoltage
and Controls
Symbol Unit
U V
N3
U V
N3
U V
N3
w -
U V
N3max
Fig.4-12: Control voltage
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:
"Dimensioning the Mains Connection" in the Project Planning Man‐
ual "Rexroth IndraDrive – Drive System".
Insulation monitoring impossible
The input 0 V is connected in conductive form with the housing po‐
tential. Insulation monitoring at +24V and 0V against housing is
therefore impossible.
Rexroth IndraDrive | Project Planning Manual
Value
19,2 ... 28,8 (24 ±20%)
When using supply units HMV01.1E, HMV01.1R,
HMV02.1R, HLB01.1D:
22,8 ... 27,3 (24 ‑5%, 26 +5%)
Depending on the motor cable length, the control volt‐
age must be within the following voltage ranges:
● motor cable length < 50 m: 22,8 ... 25,2 (24 ±5%)
● motor cable length > 50 m: 24,7 ... 27,3 (26 ±5%)
Take the data of the corresponding motor holding brake
into account.
26 ... 28,8
The output voltage of the internal switching power sup‐
ply unit is 24 ±10% (see control voltage block diagram
"int. SMPS").
The amplitudes of the alternating component on U
must be within the specified voltage range.
33 (max. 1 ms)
N3