ibaBM-DDCS
Manual
Issue 1.11
19
8.3.2
Star topology with NDBU mode REGEN
One or more NDBU-95 devices (DDCS branching unit) are used to distribute the DDCS
telegrams. 8 drives can be connected to each NDBU-95. Up to 16 NDBU-95 devices can
be cascaded.
The device ibaBM-DDCS must be connected via a unidirectional FO cable to that NDBU-
95, which is next to the controller. This NDBU-95 must be operated in REGEN mode,
then the device can read all telegrams, including the response telegrams sent from the
drives.
AC800 M + CI858
NDBU-95
for DDCS
S1
ON DIP
OFF
1 2 3 4 5 6 7 8
Hex address : 7C
(decimal 124)
Hex address : 7C
(decimal 124)
S1
ON DIP
OFF
1 2 3 4 5 6 7 8
POF
ibaBM-DDCS
Unidir. POF
Bi-dir. POF
REGEN
4 MBIT/s
REGEN
4 MBIT/s
Figure 4: ibaBM-DDCS (data sets) with NDBU-95, REGEN mode
