Siemens S5-135U/155U appendix Housing, Incoming and outgoing cables at the front of the housing

6)

1) 4) 5)

Central Controllers and Expansion Units Power Supply Units

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	11	19	27	35	43	51	59	67	75	83	91	99	107	115	123	131	139	147	155	163
Module Type
923 coordinator
CPU 922/
CPU 928-3UA21/
CPU 928B-3UB21
CPU 928, CPU 928B
CPU 948
CP 5XX, CP 143,
CP 5430, CP 5431 1)
IM 300-5
IM 301-5 2)
IM 300-3, IM 301-3
IM 304, IM 308, IM 308B
IM 307 1) 3)

DI, DQ,

AI, AQ 1)

IP 241USW, IP 244,

IP 246, IP 247, IP 252 1)

IP 240, IP 241, IP 242,

IP 242A, IP 242B, IP 243,

IP 281

IP 245

IP 257

IP 260,

IP 261

Load power supply -951 1)

Electrical connection Mechanical width

System Manual	4-3
C79000-G8576-C199-06