Bosch Rexroth IndraDrive HMV Project Planning Manual page 284

274/369 Bosch Rexroth AG | Electric Drives
Functions and Electrical Connection Points
CAUTION
and Controls
Risk of fire caused by the "sacrificing behavior" of the ZKS stage!
The "ZKS" input activates the function "DC bus short circuit", when there hasn't
any voltage been applied and when there isn't any current flowing to the input.
This status occurs both in the case of wire break and when the 24V supply fails.
When the 24V supply fails in applications in which energy does not only get to
the DC bus via the mains connection, but also via regeneratively operated mo‐
tors (e.g. following-on rollers), the ZKS stage converts this energy into heat until
it is destroyed ("sacrificing behavior").
Counter measures with such applications:
● Do not use drive controllers with integrated ZKS stage or
● buffer the 24V supply (e.g. by means of a UPS) to evaluate the monitor
and switch off the energy flow in the case of error.
Assignment
Fig.8-42: Connection point X32
Rexroth IndraDrive | Project Planning Manual
Connec‐ Signal Function
tion name
9 24V_IF supply of circuits for control of DC
bus short circuit and mains con‐
1 0V
tactor
2 24V output (24 V)
Connected to connection X32.3,
it is used to switch the braking re‐
sistor switch-on threshold.
3 braking re‐ Input at HMV01.1E:
sistor
●
switch-on
threshold
●
Switch-on thresholds: see techni‐
cal data, table "Data of built-in
braking resistor"
●
●
●
4 EIN2 connection for N/O contact to
control the mains contactor
5 EIN1
(switch-on)
input is edge-controlled
6 AUS2 connection for N/C contact to
control the mains contactor
7 AUS1
(switch-off)
8 ZKS Controls the ZKS stage:
●
●
connected to 24 V (X32.2):
activates fixed threshold
(independent of mains volt‐
age)
not connected: activates
variable threshold (inde‐
pendent of mains voltage)
HMV01.1E
HMV01.1R
HMV02.1R
not connected: ZKS active
connected to 24 V: ZKS not
active