Application document for functional safety STO, SS1 (ISO 13849-1)
Compact User Manual, 09/2016, A5E34871844AM
73
Recommended safety relays
Manufacturer,
order number
1
EMERGENCY STOP
button
Siemens
EMERGENCY STOP mushroom pushbutton, positive latch-
Siemens
3SB3403-0D
Contact block with 2 contacts, 2NO, spring-loaded connec-
tion, for front panel mounting
Siemens
Protective collar for EMERGENCY STOP mushroom
pushbutton, with block, yellow
2 Device connector Siemens
3ZY1212-2BA00
(https://mall.industry.siemens.com/mall/de/at/Catalog/Product
/3ZY1212-2BA00)
Device connector for 3SK1 safety relay, 22.5 mm wide, to
electrically connect SIRIUS devices in industrial housings
with mounting rails
1 Power supply for 3SK1 Siemens
3SK1230-2AW20
(https://mall.industry.siemens.com/mall/de/at/Catalog/Product
/3SK1230-2AW20)
SIRIUS safety relay - power supply for 3SK1 advanced series
Us = 115 - 230 V AC/DC spring-loaded connection
1 Safety relay
Basic device advanced
Siemens
3SK1121-2CB41
3SK1121-2CB42
3SK1121-2CB44
(https://mall.industry.siemens.com/mall/de/at/Catalog/Product
/3SK1121-2CB42)
SIRIUS safety relay, basic unit advanced, with time delay
0.5-30 s,
4 relay enable circuits (2 NO contacts without delay, 2 NO
contacts, with delay)
Us = 24 V DC, spring-loaded connection
1 Output expansion Siemens
3SK1211-2BB40
(https://mall.industry.siemens.com/mall/de/at/Catalog/Product
/3SK1211-2BB40)
SIRIUS safety relay, output expansion, 4RO with relay ena-
ble circuits
4 NO contact + relay signaling circuit, 1 NC contact,
Us = 24 V DC, spring-loaded connection
1 Device termination con-
nector
Siemens
3ZY1212-2DA00
(https://mall.industry.siemens.com/mall/de/at/Catalog/Product
/3ZY1212-2DA00)
Device termination connector for 3SK1 safety relay, 22.5 mm
wide, to electrically connect SIRIUS devices in industrial
housings with mounting rails
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