Siemens S5-135U/155U System Manual page 69

Housing
The housing consists of bolted sheet-steel sections with ventilation openings
at the top and bottom. The housing contains the bus PCB for electrical and
logical interconnection of the modules. All the slots have guiderails which
accept the modules. Male and female connectors are thus precisely
positioned. There is a locking bar at the top of the housing to prevent the
modules from becoming accidentally detached. Modules with individual
locking are secured in the lower sectional rail. There is a cable duct for
incoming and outgoing cables at the front of the housing.
Power Supply Unit
The power supply unit with the fans is situated in the lower part of the central
controller frame. Depending on the type of power supply, the input voltage is
either 24 V DC or 230/120 V AC. The AC version can be adjusted to the
required AC voltage with a selector switch.
Modules and Slot The following table shows which modules can be inserted at which slots.
Assignments in
the S5-135U/155U
CC
Slot No. 3
Module Type
923 coordinator
CPU 922/
CPU 928-3UA21/
CPU 928B-3UB21
CPU 928, CPU 928B
CPU 948
CP 5XX, CP 143,
1)
CP 5430, CP 5431
IM 300-5
2)
IM 301-5
IM 300-3, IM 301-3
IM 304, IM 308, IM 308B
1) 3)
IM 307
DI, DQ,
1)
AI, AQ
IP 241USW, IP 244,
1)
IP 246, IP 247, IP 252
IP 240, IP 241, IP 242,
IP 242A, IP 242B, IP 243,
1) 4) 5)
IP 281
IP 245
6)
IP 257
IP 260,
IP 261
Load power supply
1)
-951
System Manual
C79000-G8576-C199-06
Central Controllers and Expansion Units Power Supply Units
11 19 27 35 43 51 59 67 75 83 91 99 107 115 123 131 139 147 155 163
Electrical connection Mechanical width
4-3