Shopping cart
Op elkaar afgestemde kwaliteitsproducten Compatible products
Of excellent quality
Op elkaar afgestemde kwaliteitsproducten 10 years of CNC-experience
Dedication & Craftmanship
3d files 3D Step or CAD files
For easy 3D modeling
Instellen Configured
As you wish
Voorraad Almost all parts
Shipped from our stock



Siemens (3SK1211-1BB40) Output Expansion for Safety Relay Basic Advanced (SCREW TYPE)

Article number 4908
In Stock In Stock
EAN-number 4011209913752
157,99 Excluded VAT Price per piece
Compatible Products

Output expansion for Siemens (3SK1121-1AB40) Safety Relay Basic Advanced. Using this output expansion module, it is possible to add additional outputs to the safety relays. Keep in mind that also device connector 3ZY1212-2BA00 or 3ZY1212-2DA00 is required.

Component features:

  • 4 x NO contacts
  • 1 x NC signaling contact
  • Power: 24VDC (received through device connector, no need to wire it)
  • Safety Integrity Level (SIL) acc. to IEC 61508: SIL3
  • Performance Level (PL) acc. to EN ISO 13849-1: e
  • Use 3ZY1212-2DA00 when the Output expansion is the last item in the chain. (furthest on the right)
  • Use 3ZY1212-2BA00 when the Output expansion is not the last item in the chain. (middle position)
  • NOTE: When using the 3ZY connector you can switch between instananeous or delayed control of the basic unit using the slide switch of the output expansion, but when using conventional wiring the slide switch has no function.


Here you can find all attachments that are linked to the product. Click on the icon to download.

4908-1_Siemens_3SK12111BB40_datasheet_en.pdf 4908-1 Siemens 3SK12111BB40_datasheet_en
4908-2_SIEMENS_3SK1_Safety_Relays_Manual.pdf 4908-2_SIEMENS_3SK1_Safety_Relays_Manual