Siemens SINAMICS G150 - Page 103

Electrical installation
4.9 Signal connections
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
103
Bus terminating resistor
The bus terminating resistor must be switched on or off depending on its position in the bus,
otherwise the data will not be transmitted properly.
The terminating resistors for the first and last nodes in a line must be switched on; the
resistors must be switched off at all other connectors.
The cable shield must be connected at both ends over large-surface area contacts.
Note
Connector type
Depending on the connector type, the correct assignment of the connector must be ensured
(IN/OUT) in co
njunction with the terminating resistor.
Figure 4-17 Position of the bus terminating resistors
PROFIBUS address switches
The PROFIBUS address is set as a hexadecimal value via two rotary coding switches.
Values between 0
dec
(00
hex
) and 127
dec
(7F
hex
) can be set as the address. The upper rotary
coding switch (H) is used to set the hexadecimal value for 16
1
and the lower rotary coding
switch (L) is used to set the hexadecimal value for 16
0
.
Table 4- 13 PROFIBUS address switches
Rotary coding switch-
es
Significance
Examples
21
dec
35
dec
126
dec
15
hex
23
hex
7E
hex
16
1
= 16 1 2 7
16
0
= 1 5 3 E