Balluff BNS 819-D04-D16-100-10-FD Mechanical Multi Position Limit Switch

Balluff BNS 819-D04-D16-100-10-FD is a mechanical multi-position limit switch that provides four discrete switching positions in a single compact housing. The unit uses four chisel-style plungers with snap-action contacts and per-position dual changeover (one normally open and one normally closed) contacts that are galvanically isolated, delivering reliable end‑of‑travel and indexing sensing across four steps. Housed in aluminum (anodized) with dimensions of 120 x 105 x 85 mm, the enclosure is IP67 rated and designed for vertical installation with screw-terminal connections and two M25 cable entries for routing. Per position, it supports 6 A at up to 250 VAC, with contacts made of fine silver and gold-plated alloys, and a stainless steel plunger (1.4034); the distance from cam to reference edge is 4.50–5.00 mm, first plunger spacing is 30 mm, and switch-position spacing is 16 mm. The operating temperature range is -5 to 85 C, enabling robust performance in industrial environments. The -FD suffix denotes this specific configuration variant of Balluff’s four-position BNS 819 family, suitable for mechanical end-of-travel detection, multi-position indexing, and other automation tasks where four discrete limit positions must be sensed in a single device.