Siemens S5-135U/155U - Manual (Page 261)

5-121
System Manual
C79000-G8576-C199-06
If the CPU communicates as master in a point-to-point link with a slave, a
connecting cable can be used instead of the bus terminal.
Shown in the following figure is connecting cable for point-to-point
communication from the SINEC L1 submodule in the CPU to a partner.
Connecting cable: CPU - partner (point-to-point communication)
e.g. CPU 928B, 941...945
Transmitter
+ 24V
+ 24V
Transmitter
Shield
+ RxD
– RxD
+ 20 mA
+ TxD
– TxD 9
2
6
7
1
+ RxD
– RxD
M
+ TxD
– TxD
M 11 + 20 mA
Receiver
Receiver
Housing, GND Housing, GND
1
7
6
11
2
9
15
CPU 928B
CPU 102, 103, AG 90U/95U
15
Figure 5-30 SINEC L1 Submodule: Connecting Cable for Point-to-Point Communication via the SINEC L1
Submodule
Connecting Cable
for Point-to-Point
Communication
CPUs, Memory Cards, Memory Submodules, Interface Submodules