The Siemens 3SF7844-8BD20-0SS1 is a Type 4 safety light curtain receiver from the SIMATIC FS420I family, built for guarding hazard zones where a 30 mm detection capability is needed — catching fingers reaching into the danger area per IEC 61496-1. The 1350 mm protective height and 0 to 18 m range cover a wide access point or perimeter on a conveyor line or machine cell. The PROFIsafe bus connection means it talks directly to a safety-rated PLC over the fieldbus, no separate safety relay needed between the curtain and the controller.
Siemens 3SF7844-8BD20-0SS1 Light Curtain Receiver, 1350mm
MPN3SF7844-8BD20-0SS1
Siemens SIMATIC FS420i Type 4 safety light curtain receiver, 30 mm resolution, 1350 mm protective height, 0 to 18 m range, PROFIsafe bus connection, order code 3SF7844-8BD20-0SS1.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
Where can I buy the 3SF7844-8BD20-0SS1 and get a price?
The 3SF7844-8BD20-0SS1 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
What are the key specs of the 3SF7844-8BD20-0SS1 light curtain receiver?
It is a Type 4 standard receiver with 30 mm resolution, 1350 mm protective height, and a 0 to 18 m operating range, using a PROFIsafe bus connection within the SIMATIC FS420I system.
MPN
3SF7844-8BD20-0SS1