SIEMENS
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Siemens IC 10 · 2017
Safety Relays
SIRIUS 3SK Safety Relays
General data
11
Parameter assignment
3SK112 and 3SK1112 with DIP switch
The 3SK112 and 3SK1112 safety relays are configurable safety
relays. They are used as evaluation units for typical safety chains
(identify, evaluate, realize). A number of functions can be set
using the DIP switches on the front. 3SK112 and 3SK1112 are
therefore universally applicable.
3SK2 with software
The 3SK2 safety relays are configured with the SIRIUS Safety ES
software. The behavior of a 3SK2 device as well as the function-
ing of the individual safe outputs can thus be parameterized sim-
ply and conveniently in the logic diagram. In addition, the con-
figuration can be printed out for documentation purposes. The
software also supports users in commissioning and trouble-
shooting by means of online diagnostics and the option of
"forcing" signals in the logic diagram. The 3SK2 safety relays
thus offer maximum flexibility and universal application options.
Note:
For SIRIUS Safety ES,
see page 14/34
.
Enclosure concept
Innovative enclosure concept for SIRIUS 3SK safety relays
Connection methods
The 3SK safety relays are available with screw or spring-type
terminals (push-in).
Spring-type terminals (push-in)
Push-in connections are a form of spring-type terminals allowing
fast wiring without tools for rigid conductors or conductors
equipped with end sleeves.
As with other spring-type terminals, a screwdriver (with
3.0 x 0.5 mm blade) is required to disconnect the conductor.
The same tool can also be used to wire finely-stranded or
stranded conductors with no end finishing.
The advantages of the push-in terminals are found, as with all
spring-type terminals, in speed of assembly and disassembly
and vibration-proof connection. There is no need for the check-
ing and tightening required with screw terminals.
DIP switch
No.
OFF
ON
Schematic
1
Sensor input
Autostart
Sensor input
Monitored start
2
Without crossover
monitoring
With crossover
monitoring
3
2 x single-channel
sensor connection
1 x 2-channel
sensor connection
4
With start test
Without start test
ON
1
2
3
4
IC01_00196
8
7
7
10
4
5
3
6
2
1
1
2
1
2
10
9
3
8
9
7
5
6
4
Device display
Connecting terminals
Labeled terminal covers
DIP switches
SET/RESET button
Sealable cover
LED status display
Data matrix code
Memory module
Device interface
IC01_00431b
© Siemens AG 2016