Siemens S5-135U/155U System Manual page 248

CPUs, Memory Cards, Memory Submodules, Interface Submodules
Jumper Settings
When the TTY submodule is delivered, the jumpers are set as shown in the
on the TTY
following figure. As a rule, therefore, you can use the TTY submodule
Submodule immediately.
Figure 5-21
The polarity of the transmit and receive data is changed over with jumpers J1
and J2:
J1
J2
The 24 V source voltage for generation of the loop current can be allocated
with jumper J3:
J3
5-108
Front Connector
25-Pin Sub. D-Type
J3
3 2 1
J2
J1
J4
1
2
3
Backplane Connector
TTY Submodule: Jumper Settings when Delivered
1 2 3
Transmit data negated
Transmit data in normal polarity
Receive data in normal polarity
Receive data negated
1 2 3
24 V will be applied from Pin 9 of
the sub. D connector
24 V will be applied from the
backplane connector (internally)
System Manual
C79000-G8576-C199-06