ABB DCS800 - Page 64

Electrical installation
64
3ADW000194R0611 DCS800 Hardware Manual f us
The bus ground (GNDB) is isolated. It can be ground terminated at one point only.
Example of two DCS800 D5 converters with FEX-425-Int internal field supply.
The connection of isolated GNDB between two or more serial communication
interfaces is optional. It is recommended to connect GNDB if the supply voltage is
above 690 V and the cabling is made from cubicle to cubicle.
Example of one DCS800 D5 converter plus external field supply.
Cable length
The cable length influences the maximum baudrate.
The bus is designed for cable length up to 50 meters. Larger distances on request.
Baudrate max. cable length
50 k 500 m
125 k 500 m
250 k 250 m
500 k 100 m default and recommended setting
800 k 50 m
888 k 35 m
1000 k 25 m
CAN_Bus_termination_c.dsf
FEX-425-Int
SDCS-DSL
X3:
X52:
X53:
GNDB
S2
GNDB
S1100:1 S1100:3
S1100:2
321 123321
FEX-425-Int
X3:
GNDB
S1100:1
S1100:3
S1100:2
231
SDCS-DSL
X52:
X53:
GNDB
S2
123 3 21
DCS800 D5 ConverterDCS800 D5 Converter
Set bus
termination ON
(S1100:1 closed)
Termination OFF Termination OFF
Set bus
termination ON
at the end
Bus termination
(next drive)
(next converter)
DCF803-0035
FEX-4
X3:
GNDB
S1100:1
S1100:3
S1100:2
231
SDCS-DSL
X52: X53:
GNDB
S2
123 3 21
S1
2
1
X51:1
X51:2
+24 V
0 V
X1:1
X1:2
+24 V
0 V
DCS800 D5 Converter
Set bus
termination ON
(S1:1-2 closed)
Set bus
termination ON
(S1100:1 closed)
Bus termination