System Description - Siemens SIMATIC S5-90U System Manual

S5-90U/S5-95U
Dimensions
The S5-90U and S5-95U programmable controllers are distinguished by their low space requirement.
They can be used even in places too small for accommodating a conventional control consisting of
contactors and relays. They are thus the ideal solution if a controller for a small control task must
additionally be fitted in a control cabinet already containing a complete configuration.
The two PLCs can also be operated without any I/O modules. They constitute, of course, the most
economical solution with regard to space requirements if the onboard I/Os are sufficient for
implementing the control task.
The number of bus units used for external I/Os determines the space requirement.
Programmable Controller
S5-90U programmable controller
S5-95U programmable controller
Bus unit with two I/O modules,
with terminal block for
Mounting
The S5-90U can be mounted directly on walls or mounting plates. For this purpose, you need four
wall brackets that can be pushed into the four openings on the rear of the casing and then
mounted on the wall using screws.
The S5-95U snaps onto a 35 mm standard mounting rail which also accommodates the bus units
for the external I/O modules. Optionally, the S5-90U can also be fitted on a 35 mm standard
mounting rail.
Power Supply
When configuring a system or plant, you have to make sure the PLC is provided with the supply
voltage required.
The S5-90U can be connected directly to the 115/230 V AC mains supply.
The S5-95U can be connected directly to a 24 V DC voltage supply. Power supply modules
providing 1 A to 10 A (at 24 V) are available for connection to 115/230 V AC.
EWA 4NEB 812 6115-02b
Table 1-1. Dimensions
Width
145 mm
145 mm
screw-type 91.5 mm
connection
crimp snap-in 91.5 mm
connection

System Description

Height Depth
135 mm 97 mm
135 mm 146 mm
162 mm 137.8 mm
135 mm 137.8 mm
1-3