SIEMENS
12/6
Siemens IC 10 · 2017
SIRIUS 3SE5 Mechanical Position Switches
General data
12
Cover design
The mechanical position switches have a turquoise cover and
the mechanical safety switches have a yellow cover.
On request the switches can be delivered ex works with a yellow
cover. The cover has no effect on the mode of operation.
Both versions can be used in safety applications
(see also page 12/18)
.
Diverse contact types
Exchangeable two and three-pole contact blocks
for all enclosure sizes
The three-pole contact block with snap-action or slow-action
contacts is regularly available for all enclosure forms. The same
installation space is required as for a two-pole block. The version
with 1 NO + 2 NC offers, for example, more safety through re-
dundant shutdowns (2
NC contacts) with simultaneous signaling
(NO contact). The three-pole blocks are also available with
make-before-break and with 2 NO + 1 NC.
Contact reliability
The contact blocks ensure an extremely high contact stability.
This applies even when the devices are switching low voltages
and currents, e. g. 1 mA at 5 V DC.
Positive opening
q
The NC contacts of the switch are forced open mechanically,
positively-driven and reliably by the plunger. This is referred to
as "positive opening".
Mounting
Easy plug-in method for fast replacement of the actuator heads
Open the cover (1)
Actuate the locking lever (2)
Replace the head (turnable by 16 x 22.5°) (3)
Lock and close the cover (4)
Quick-connect technology
For plastic enclosure with a width of 31 mm
These position switches can be wired quickly and easily as an
added customer benefit. The connecting cable is first con-
nected to the terminals of the contact block and then guided
through a slit into the cable gland opening. The time saved
through this new connection method is approx. 20 to 25 %.
A cable gland with seal must be used with the quick-connect
method.
Optional LED indicators
LED indicators are available for all enclosure sizes except for XL.
The enclosures are supplied with an LED signaling indicator
(1 × green + 1 × yellow). This is the first time that optical signal-
ing equipment is also available for small standard enclosures
according to EN 50047. The LEDs are implemented in 24 V DC
and 230 V AC.
IC01_00270
© Siemens AG 2016