Wiring the modbus
If the system is integrated into an existing ModBus system, it must be ensured that the terminating resistor is
activated on the communication module of the first user. In addition, a terminating resistor must be ensured by
the higher-level system.
7[
;
&
6
U
H
5[
7
7[
;
&
6
U
H
5[
7
7[
;
&
6
U
H
5[
7
# 1
# 2
# n
Terminating
resistor ON
Terminating
resistor OFF
Terminating
resistor OFF
Terminating
resistor ON
Superordinate
Modbus system
(Terminating resistor 120
Ohm)
Data +
(A)
GND
Data -
(B)
Electric components and wiring
7
Cascade / Modbus
Service manual SPS 4000 | B0960622_en
139
Содержание SPS 4000
Страница 114: ...7 Electric components and wiring PLC 114 Fröling GesmbH A 4710 Grieskirchen Industriestraße 12 www froeling com ...
Страница 142: ...8 Notes 8 Notes 142 Fröling GesmbH A 4710 Grieskirchen Industriestraße 12 www froeling com ...
Страница 143: ...Notes 8 Service manual SPS 4000 B0960622_en 143 ...