Technical data
94
3ADW000462R0401 DCS880 Hardware manual e d
DDCS branching unit NDBU-95
The NDBU-95 is used to implement star topology for DDCS communication. This allows a drive to fail or
become unpowered without disabling the complete communication. The NDBU-95 receives messages from the
master (e.g. PC) and sends them to all the drives simultaneously. Each drive has an individual address and
only the addressed drive sends a reply message to the master.
NDBU-95 has nine output channels. The reply message sent by a drive is delivered to the master. Several
NDBU-95s can be used in parallel, in series or in any combination of these. The maximum distance between
the master and a NDBU-95 as well as between two NDBU-95s, see manual
Technical data
Layout of the NDBU-95
Optical links:
Master channels
1 DDCS input and 1 DDCS out-
put
Drive channels
9 DDCS inputs and 9 DDCS
outputs
Data rate
1 ... 4 Mbit/s, (see X12)
Driving current
20 mA, 30 mA, 50 mA, channel
disabling, (see X2 ... X11)
Monitoring
A green LED for each channel is
switched on, when messages are
received
Transmission device
10 Mb components
Power supply:
Input voltage
+24 V
DC
±10 %
Input current
300 mA
Monitoring
A green LED is switched on,
when the output voltage is normal
Operating temperature:
+0 ... +50°C
Dimensions:
See diagram
Note:
Only channels with the same hardware
components (e.g. 10 Mb component) are
allowed to be connected together.
For further information see
41
94
DBU
264
V120
V119
V118
V117
V116
V115
V114
V113
V112
V111
V110
V109
V108
V107
V106
V105
V104
V103
V102
V101
X1
8
1
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
RXD
MSTR
24 V DC
S1
NDBU-95
DDCS
BRANCHING
UNIT, 8+1 CH
CH0
1
2
0 V
TXD
RXD
TXD
RXD
TXD
RXD
TXD
RXD
TXD
RXD
TXD
RXD
TXD
RXD
TXD
TXD
RXD
TXD
RXD
+5V OK
X2-
X11
TRANSM
SETTING
DIS
LONG
MEDIUM
SHORT
1
0
ADDRESS
+
+
+
+
+
+
+
+
X12
+
+
+
+
+
+
+
+
1 2 4
MBIT/S
