ABB DCS800 Hardware Manual

Technical data
83
3ADW000194R0611 DCS800 Hardware Manual f us
DDCS Branching unit NDBU-95
DDCS Branching Unit (DBU) is used (for DCS 600/DCS800) to implement the star topology of DDCS
link. This allows a slave unit to fail or become unpowered without disabling the communication. The
NDBU receives messages from the master (PC) and sends them to all the slave units simultaneously.
Each slave unit has an individual address and only the addressed slave unit sends a reply message to
the master. It is also possible to use NDBU thus enabling peer-to-peer communication.
NDBU-95 DDCS Branching Unit has nine output channels where messages from the master are sent.
The reply message sent by one slave unit is delivered to the master and it can be delivered also to
other slaves if necessary. Several NDBU-95s can be used in parallel, in series or in any combination of
these. The maximum distance between the master and NDBU-95 as well as between two NDBU-95s,
see manual Branching units NDBU-95.
Technical specifications Layout of the NDBU-95 branching unit
Optical links:
Master channels 1 DDCS input and 1 DDCS output
Slave channels 9 DDCS inputs and 9 DDCS out-
puts
Data rate 1 - 4 MBd, programmable
Driving current 20 mA, 30 mA, 50 mA + channel
disabling, programmable
Monitoring a green LED for each channel,
switched on when NDBU is receiv-
ing messages
Transmission device 10 Mb component for each channel
Power supply:
Input voltage +24 VDC ± 10%
Input current 300 mA
Monitoring a green LED switched on when the
output voltage is normal
Operating temperature: +0 ... +50 °C
PCB dimensions: s. diagram beside
Remark: Only channels with the same components (e.g.
10 Mb component) may be connected to each
other.
For further information see Appendix D in the DriveWindow
User's Manual.
Note
For addressing and automatic node numbering of the
drives and branching units see DriveWindow documenta-
tion.
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
20 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
10
ADDRESS
+
+
+
+
+
+
+
+
X12
+
+
+
+
+
+
+
+
124
MBIT/S

ABB DCS800 Specifications

General

Control Type	Digital
Supply Voltage	380 ... 690 V AC
Input Voltage Range	380 V to 690 V AC
Control Mode	Torque, Speed
Cooling Method	Air-cooled
Communication Protocols	Modbus, Profibus, CANopen
Communication Options	Ethernet
Protection Class	IP21, IP54
Enclosure Rating	IP00, IP21, IP54
Protection	Overcurrent, Overvoltage, Overtemperature
Ambient Temperature	0 to 40°C
Field Supply	Integrated or External