Power supply to KSM/KMS (KCU)
A drive line for power supply in the Rexroth IndraDrive Mi system is designed
as a bus (L+, L-) and consists of:
●
X54 connector at KCU
●
RKH hybrid cable
●
X103.1 and X103.2 connectors at KSM/KMS
●
RHS0014 terminal connector at KSM/KMS
Comply with UL rating I
Bypass
In the case of equal load, the greatest load of the hybrid cable is
on the first cable segment.
In the drive line, place powerful KSM/KMS as near as possible to
the output of the drive connection box KCU.
Observe the maximum allowed bypass current I
Bypass
in each seg‐
ment (see
).
If necessary, install more KCU devices.
Available power at drive line
Available power P
KCU_strang
at a drive line:
P
KCU_strang
Available power at drive line
V
out
Output voltage, depending on supply unit
I
out_max
Fig. 7-6:
Available power at KCU drive line
With a small number of KSM/KMS and a low degree of power consumption in
a drive line (operation at partial load), the measurable value I
strang
at the out‐
put of KCU is above the value which would result from the calculation of the
power P
LN
of KSM/KMS and U
out
of KCU. The deviation is due to wattless
currents; the influence of these currents is insignificant in operation under rat‐
ed conditions.
Continuous power
Comply with continuous power
The sum of the electric powers of all KSM/KMS of a drive line
should not exceed the calculated value P
KCU_strang
of the KCU
drive connection box.
P
LN_nenn
Nominal power KSM/KMS
P
KCU_strang
Available power at drive line
Fig. 7-7:
Checking the continuous power
Instead of P
LN_nenn
, it is allowed to use the actually occurring con‐
tinuous power of the KSM/KMS.
Taking the average speed and simultaneity factor into account,
the sum of the installed rated motor powers therefore can be sig‐
nificantly higher with servo operation.
Bosch Rexroth AG
DOK-INDRV*-KCU02+KSM02-PR03-EN-P
200/337
Rexroth IndraDrive Mi Drive Systems with KCU02 KSM02, KMS02/03, KMV03, KNK03
Notes on project planning
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01