
Data sheet 3SK1111-1AW20
SIRIUS safety relay Basic unit Standard series Relay enabling circuits 3 NO
contacts plus Relay signaling circuit 1 NC contact Us = 110 - 240 V AC/DC 50/60
Hz screw terminal
protection class IP of the enclosure
touch protection against electrical shock
insulation voltage rated value
air pressure according to SN 31205
relative humidity during operation
installation altitude at height above sea level maximum
4 000 m; Derating, see Product Notification 109792701
vibration resistance according to IEC 60068-2-6
surge voltage resistance rated value
installation environment regarding EMC
This product is suitable for Class A environments only. In household
environments, this device can cause unwanted radio interference. The user is
required to implement appropriate measures in this case.
reference code according to IEC 81346-2
number of sensor inputs 1-channel or 2-channel
type of the safety-related wiring of the inputs
single-channel and two-channel
product feature cross-circuit-proof
Safety Integrity Level (SIL)
● according to ISO 13849-1
category according to EN ISO 13849-1
Safe failure fraction (SFF)
PFHD with high demand rate according to EN 62061
PFDavg with low demand rate according to IEC 61508
T1 value for proof test interval or service life according to
IEC 61508
hardware fault tolerance according to IEC 61508
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© Copyright Siemens

safety device type according to IEC 61508-2
number of outputs as contact-affected switching element
— for signaling function instantaneous contact
— safety-related instantaneous contact
— safety-related delayed switching
stop category according to EN 60204-1
● cascading input/functional switching
type of electrical connection plug-in socket
operating frequency maximum
switching capacity current
● of the NO contacts of the relay outputs
● of the NC contacts of the relay outputs
thermal current of the switching element with contacts
maximum
operational current at 17 V minimum
mechanical service life (operating cycles) typical
design of the fuse link for short-circuit protection of the NO
contacts of the relay outputs required
gL/gG: 6A or circuit breaker type A: 3A or circuit breaker type B: 2A or circuit
breaker type C: 1A
design of the fuse link for short circuit protection of the NC
contacts of the relay outputs required
Diazed or Neozed fuses, operating class gL/gG: 6 A or MCB type A: 2 A or
MCB type B: 2 A or MCB type C: 1 A
● for total of all sensor circuits with Cu 1.5 mm² and 150
nF/km maximum
make time with automatic start
make time with automatic start after power failure
make time with monitored start
backslide delay time after opening of the safety circuits
typical
backslide delay time in the event of power failure
recovery time after opening of the safety circuits typical
recovery time after power failure typical
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© Copyright Siemens

● of the sensor input minimum
● of the ON pushbutton input minimum
type of voltage of the control supply voltage
control supply voltage frequency
operating range factor control supply voltage rated value of
magnet coil
Installation/ mounting/ dimensions
required spacing for grounded parts at the side
screw and snap-on mounting
type of electrical connection
type of connectable conductor cross-sections
1x (0.5 ... 2.5 mm²), 2x (1.0 ... 1.5 mm²)
— with core end processing
1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)
type of connectable conductor cross-sections for AWG
cables
1x (20 ... 14), 2x (18 ... 16)
1x (20 ... 16), 2x (20 ... 16)
product function parameterizable
Sensor floating / monitored start / automatic start
suitability for operation device connector 3ZY12
suitability for interaction press control
● monitoring of floating sensors
● monitoring of non-floating sensors
● magnetically operated switch monitoring
● safety-related circuits
Confirmation
Functional
Safety/Safety of Machinery
Declaration of Conformity
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© Copyright Siemens

Type Examination Cer-
tificate
Confirmation Confirmation
Siemens has decided to exit the Russian market (see here).
https://press.siemens.com/global/en/pressrelease/siemens-wind-down-russian-business
Siemens is working on the renewal of the current EAC certificates.
Please contact your local Siemens office on the status of validity of the EAC certification if you intend to import or offer to supply these products to an
EAC relevant market (other than the sanctioned EAEU member states Russia or Belarus).
Information on the packaging
https://support.industry.siemens.com/cs/ww/en/view/109813875
Information- and Downloadcenter (Catalogs, Brochures,…)
https://www.siemens.com/ic10
Industry Mall (Online ordering system)
https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3SK1111-1AW20
Cax online generator
http://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3SK1111-1AW20
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
https://support.industry.siemens.com/cs/ww/en/ps/3SK1111-1AW20
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)
http://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3SK1111-1AW20&lang=en
Type Test Certific-
ates/Test Report
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© Copyright Siemens

Logic
Autostart / Monitored Start
42
34
24
14
A2-
41
33
23
13
IN
F/S
T4
IN2
T2
IN1
T1
A1+
-K
Logic
Autostart / Monitored Start
42
34
24
14
A2-
41
33
23
13
IN
F/S
T4
IN2
T2
IN1
T1
A1+
-K
last modified:
3SK11111AW20
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8/11/2023
10/20/2023
Subject to change without notice
© Copyright Siemens