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Siemens 3SF7844-6TB13-0SS1 — Safety Interlock Switches

Siemens 3SF7844-6TB13-0SS1 Light Curtain Receiver, Type 4, 1

MPN3SF7844-6TB13-0SS1

Siemens SIMATIC FS440I Type 4 safety light curtain receiver, 14 mm resolution, 900 mm protected height, 0–6 m range, ASIsafe bus connection, order code 3SF7844-6TB13-0SS1.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Product details

The 3SF7844-6TB13-0SS1: The 14 mm resolution means the curtain detects objects as small as 14 mm — finger-protection class per IEC 61496-1 — so it's suited for guarding access points where operators can reach into the hazard zone. The 900 mm height covers a typical vertical opening for a standing operator's reach. The 0 to 6 m range gives flexibility for longer spans, but the actual mounting distance must stay within that window for reliable detection. ASIsafe bus connection means it communicates directly on an AS-Interface safety network without a separate safety relay module — a clean integration path for existing AS-i lines.

Type 4 light curtains are the standard for guarding hazardous machinery per IEC 61496-1 and ISO 13849-1 — press brakes, assembly stations, robotic cells, packaging lines. The receiver pairs with a matching transmitter (same resolution and height) to create a detection field. In a typical installation, the curtain mounts vertically on the machine frame or guarding structure, with the ASIsafe bus cable routed back to an AS-i safety monitor or a SIMATIC safety controller.

Frequently asked questions

Where can I buy 3SF7844-6TB13-0SS1 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for availability and current pricing.

What is the resolution and range of this light curtain?

It has a 14 mm resolution, a 900 mm protected height, and operates over a 0 to 6 m range.

What bus connection does this receiver use?

It uses the ASIsafe bus connection, integrating directly into an AS-Interface safety network.

MPN
3SF7844-6TB13-0SS1