Siemens S5-135U/155U - Manual (Page 193)

5-53
System Manual
C79000-G8576-C199-06
Organization blocks OB OB 1 to 39 (interfaces for operating system)
Integrated special function organization
blocks OB See Pocket Guide
Integrated serial interface PG interface
Optional serial interface Via interface submodules, optionally as V.24, TTY, RS 422A/485 or
PG interface
SINEC L1 interface from Version 6ES5 928-3UB12
Backplane bus S5 bus
Dimensions (w x h x d) 40.64 x 233.4 x 160 mm
Weight Approx. 1 kg
CPUs, Memory Cards, Memory Submodules, Interface Submodules