8VZZ000017L320 ABB H&B Contronic
● Connections
The same type of cable should be used throughout the installation for the system bus (RS 485).
Avoid interruption of the bus, for example, when connecting cables at the marshalling cabinet.
Whenever interruption of the bus is absolutely necessary, it must be wired to the same side of the terminals.
The bus must be terminated with a 120 , 1/4 Watt resistor, this must be connected at the ends of the bus.
The central units UCZA/UCZB, the couplers 07 CS 61 and 35 CS 91 have to be connected at an end of the bus. The resistor 120 is integrated.
The other central units and the PC board should be connected everywhere on the bus.
The shield of the bus must be connected to the earth near the master.
When noisy elements are in the area of the cabinet, it is better to connect the bus' shield to the ground via a capacitor 1 nF class Y directly at the access of the cabinet according the following diagram.
DSTD108
DSTF610
DSU14
DTCC901B
DTDX991A
EHDB130
EHDB280
EI802F
EI803F
EI813F
EL3040
FEN-31
FM9925A-E
FS450R12KE3/AGDR-71C
GCC960C102
GCD207B101
GD9924BE
GD9924BE/V2
GDC801B101
GDC806A0101
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