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Picture of 3SK1211-1BB40 SIEMENS SIRIUS Safety relay 3SK12111BB40

3SK1211-1BB40 SIEMENS SIRIUS Safety relay 3SK12111BB40

SIRIUS safety relay Output expansion 4RO with relay enabling circuits 4 NO contacts plus Relay signaling circuit 1 NC contact Us = 24 V DC screw terminal
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Manufacturer: SIEMENS
SKU: PCM1737
1,450.00 (SAR)
1,205.00 (SAR)
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Technical data

SIRIUS safety relay Output expansion 4RO with relay enabling circuits 4 NO contacts plus Relay signaling circuit 1 NC contact Us = 24 V DC screw terminal
product brand name SIRIUS
product category Safety relays
product designation Output expansion
design of the product Relay enabling circuits
General technical data
protection class IP of the enclosure IP20
touch protection against electrical shock finger-safe
insulation voltage rated value 300 V
ambient temperature  
● during storage -40 ... +80 °C
● during operation -25 ... +60 °C
air pressure according to SN 31205 900 ... 1 060 hPa
relative humidity during operation 10 ... 95 %
installation altitude at height above sea level maximum 2 000 m
vibration resistance according to IEC 60068-2-6 5 ... 500 Hz: 0.75 mm
shock resistance 10g / 11 ms
surge voltage resistance rated value 4 000 V
EMC emitted interference IEC 60947-5-1, IEC 61000
installation environment regarding EMC This product is suitable for Class B environments and can also be used in domestic environments.
overvoltage category 3
degree of pollution 3
reference code according to EN 61346-2 F
reference code according to IEC 81346-2 F
power loss [W] maximum 2.5 W
Safety Integrity Level (SIL) according to IEC 62061 3
Safety Integrity Level (SIL) according to IEC 61508 3
performance level (PL) according to ISO 13849-1 e
category according to EN ISO 13849-1 4
PFHD with high demand rate according to EN 62061 0.0000000017 1/h
PFDavg with low demand rate according to IEC 61508 0.000001
T1 value for proof test interval or service life according to IEC 61508 20 y
hardware fault tolerance according to IEC 61508 1
safety device type according to IEC 61508-2 Type A
Inputs/ Outputs
number of outputs as contact-affected switching element  
● as NC contact  
— for signaling function delayed switching 0
— for feedback circuit instantaneous contact 1
— safety-related instantaneous contact 0
— safety-related delayed switching 0
● as NO contact  
— for signaling function instantaneous contact 0
— for signaling function delayed switching 0
— safety-related instantaneous contact 4
— safety-related delayed switching 0
number of outputs as contact-less semiconductor switching element  
● for signaling function  
— delayed switching 0
stop category according to EN 60204-1 0
type of electrical connection plug-in socket No
operating frequency maximum 360 1/h
switching capacity current of the NO contacts of the relay outputs  
● at DC-13  
— at 24 V 5 A
— at 115 V 0.2 A
— at 230 V 0.1 A
● at AC-15  
— at 24 V 5 A
— at 115 V 5 A
— at 230 V 5 A
thermal current of the switching element with contacts maximum 5 A
total current maximum 12 A
operational current at 17 V minimum 5 mA
mechanical service life (switching cycles) typical 10 000 000
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
make time with automatic start  
● typical 15 ms
● at DC maximum 30 ms
make time with automatic start after power failure  
● typical 15 ms
● maximum 30 ms
backslide delay time in the event of power failure  
● typical 10 ms
● maximum 15 ms
recovery time after power failure typical 0.015 s
Control circuit/ Control
type of voltage of the control supply voltage DC
control supply voltage  
● at DC  
— rated value 24 V
operating range factor control supply voltage rated value of magnet coil  
● at DC 0.8 ... 1.2
Installation/ mounting/ dimensions
mounting position any
required spacing for grounded parts at the side 5 mm
required spacing with side-by-side mounting at the side 0 mm
fastening method screw and snap-on mounting
width 22.5 mm
height 100 mm
depth 121.6 mm
Connections/ Terminals
type of electrical connection screw-type terminals
type of connectable conductor cross-sections  
● solid 1x (0.5 ... 2.5 mm²), 2x (1.0 ... 1.5 mm²)
● finely stranded  
— with core end processing 1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)
type of connectable conductor cross-sections at AWG cables  
● solid 1x (20 ... 14), 2x (18 ... 16)
Product Function
product function parameterizable undelayed/delayed (only with system connector)
suitability for operation device connector 3ZY12 Yes
suitability for use  
● safety-related circuits Yes
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