Siemens S5-135U/155U - Manual (Page 232)

5-92
System Manual
C79000-G8576-C199-06
5.11 Interface Submodules
The second serial interface of the CPU 928B can be optionally used as:
S
A PG interface (for PG and operator panels)
S
An interface for the RK 512 computer link
S
An interface for data transmission with procedures 3964/3964R
S
An interface for data transmission with the “open driver”
S
An interface for data transmission via the SINEC L1 bus (from Version
6ES5 928-3UB12)
The second serial interface of the CPU 948 can be used as:
S
A PG interface (for PG and operator panels)
To use the second interface as ... ... you require ...
a PG interface the PG submodule
an interface for data transmission
with
RK 512 computer link,
procedures 3964/3964R
or “open driver”
the V.24 (RS 232C)
or TTY
or RS 422 A/485 submodule
(only in RS 422 A mode)
an interface for data transmission
via the SINEC L1 bus the SINEC L1 submodule
Using the Interface
Submodules
CPUs, Memory Cards, Memory Submodules, Interface Submodules