Siemens S5-135U/155U - Manual (Page 156)

5-16
System Manual
C79000-G8576-C199-06
Data blocks DB 256, of which 253 are freely available
Data blocks DX 256, of which 253 are freely available
Organization blocks OB OB 1 to 39 (interfaces for operating system)
Integrated special function organization
blocks OB OB 121, 122, 124-126, 131-133, 141-143, 150, 151, 153, 200,
202-205, 222, 223, 254, 255
Integrated serial interface PG interface
Optional serial interface Via interface submodules, optionally as V.24, TTY, RS422 A/485
submodule, SINEC L1 or PG interface
Backplane bus S5 bus
Dimensions (w x h x d) 20.32 x 233.4 x 160 mm
Weight Approx. 0.6 kg
CPUs, Memory Cards, Memory Submodules, Interface Submodules