KCU at HMV and HCS - number of axes, capacitances C
y
The drive connection box KCU passes the DC bus voltage of the
supply unit to the KSM/KMS via the hybrid cable. Due to decou‐
pling components, KCU with the maximum number of KSM/KMS
acts like one more axis with higher C
Y
(capacitance against
ground) for HMV01.1E, HMV02.1E supply units and HCS convert‐
ers.
When selecting the supply unit or converter, observe the allowed
combinations of HNF/NFD mains filter and HNL mains choke.
See
chapter 8.3 "Mains Connection Supply Units and Convert‐
Notes on Project Planning for
Number of Axes, C
y
Converters and supply units can supply inverters at their DC buses.
Detailed combinations of HCS converter, mains filter, mains choke:
See
chapter 8.3.3 "Mains Connection for HCS Converters" on page 113
Detailed combinations of HMV supply unit, mains filter, mains choke:
See
chapter 8.3.2 "Mains Connection of HMV Supply Units" on page 109
In the tables, observe the value C
y
(capacitance against housing) in the "Ex‐
planation" column. This value limits the number of inverters (number of axes).
Orientation Guide for Selecting the Type of Supply
HMV supply unit
HCS converter
Criterion
Central supply
with HMVxx.x
Parallel opera‐
tion with
HMVxx.xE
(not W0030)
Central
supply
Parallel
operation
Number of axes = 1
■
□
■
-
Number of axes ≤ 6
C
y
≤ 2 × 600 nF
■
□
■
■
Number of axes ≤ 18 with
mains filter "F240"
C
y
≤ 2 × 1225 nF
■
□
□
□
Number of axes ≤ 40 with
mains filter "M900"
C
y
≤ 2 × 2040 nF
■
■
-
-
High overload ratio
■
■
□
□
Regenerative operation with
great energy contents
■
HMVxx.xR
□
□
□
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
Bosch Rexroth AG
95/309
Configuring the Drive System