Siemens 3RG7844-4SB04-0SS0 Light Curtain Transmitter

Siemens 3RG7844-4SB04-0SS0 Light Curtain Transmitter is a Type 4 safety emitter in the SIGUARD family that pairs with a corresponding receiver to form a guarded safety field on industrial equipment. This 30 mm resolution transmitter provides a protection field height of 300 mm and covers a sensing distance of up to 18 meters when matched with the appropriate receiver unit. The transmitter carries a Hirschmann connection and, like other emitters in the 3RG7844 series, is designed as the emitter half of the light curtain; it offers no standalone output, relying on the paired receiver to interface with the control system. Typical applications include safeguarding hazardous points on presses, CNC machines, conveyors, and robotic cells where personnel protection is required. The exact variant 4SB04-0SS0 identifies the specific output/configuration series within the 3RG7844 family. Mounting and alignment should follow Siemens safety documentation to ensure consistent field integrity and reliable machine shutdown in case of beam interruption.