SIEMENS
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Siemens IC 10 · 2017
Safety Technology
Introduction
11
Connection methods
The 3SK safety relays are available with screw or spring-type
terminals (push-in).
The 3TK2810 safety relays and the 3RK3 Modular Safety System
are available with screw or spring-type terminals.
3SK safety relays: 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 fine-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
checking and tightening required with screw terminals.
Type
Page
SIRIUS Safety Integrated (continued)
3SE66, 3SE67
3SE63
Non-contact magnetically operated safety switches
• Small, compact, safe
• Simple installation even in restricted spaces thanks to connector versions
• Two safety contacts and one signaling contact enable simple diagnostics at the maximum
safety level
3SE66,
3SE67
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Non-contact RFID safety switches
• Long service life due to non-contact switching
• Only one switch required for the maximum safety level PL e or SIL 3 according to
EN ISO 13849-1 and IEC 61508
• Tamper protection better than with mechanical safety switches thanks to switches and
actuators with individual coding
• LED status indication including threshold indication for door displacement
• Degree of protection up to IP69 K and resistance to cleaning products
• Greater switching displacement compared to mechanical switches;
offers better mounting tolerance and sagging tolerance of the protective door
3SE63
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3SU1400
3SU1001
Command devices
3SU1
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• Using a special F adapter, EMERGENCY-STOP devices according to ISO 13850 can be
directly connected through the standard AS-Interface or PROFIsafe with safety-related
communication. This F adapter/fail-safe interface module is snapped from the rear onto the
EMERGENCY-STOP device, enabling the achievement of maximum performance level "e"
according to EN ISO 13849-1, or SIL 3 according to IEC 62061.
• EMERGENCY-STOP devices for disconnecting plants in an emergency situation
• With positive latching function according to EN ISO 13850 and performance level "e"
according to EN ISO 13849-1 or SIL 3 according to IEC 62061
• Various mushroom diameters (also illuminated), with lock, in plastic/metal, as individual or
complete units, and in combination with 3SU1 enclosure or two-hand operation console.
The 3SU1 enclosures are also optionally available with ASIsafe interface
3SE7
Cable-operated switches
• Control functions and EMERGENCY-STOP always within reach
• More safety over long distances of up to 2 x 75 m length
• Easy release
• Fail-safe applications with SIRIUS Safety Integrated
• Status display directly on the switch
• Signal display for long distances in innovative LED technology with visibility of over 50 m
• Cable-operated switches with latching according to ISO 13850 (EN 418) and full
EMERGENCY-STOP function with positive-opening contacts
• Quick and safe mounting using uniform mounting accessories
• Versions with 1 NO/2 NC with yellow lid
3SE7
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3SE2924-3AA20
Safety foot switches
• Are used wherever manual operation is not possible
• With hood, IP65 metal enclosure
• With interlock function according to ISO 13850, manual release by pushbutton switch
• With 2 NO + 2 NC, NO contacts close by momentary contact, NC contacts positively driven
with independent latching (safety function)
3SE2924-
3AA20
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Screw terminals
Spring-type terminals, (push-in)
The terminals are indicated in the corresponding tables
by the symbols shown on orange backgrounds.
© Siemens AG 2016