Machine & Operator Safety
Banner SI safety limit switches boast superior interlocking
Jun. 8, 2015 – The SI series of safety limit switches from Banner Engineering claims to effectively monitor the position of a wide variety of guards, gates, covers and other moveable machine fixtures and tooling. “The switches are ideal for monitoring sliding gates and guards on machines in safety fencing systems, in addition to solving simple position monitoring such as end-of-travel and home-position,” said Mike Carlson, technical marketing manager (Safety Products), Banner Engineering. The series is available in three models — SI-LM40, SI-LS31 and SI-LS83 — offering various actuating systems, contact arrangements, housing and mounting configurations to satisfy diverse industrial applications, notes Banner. Featuring a limit-switch style, the series complies with Type 1 per ISO 14119 standards with actuating elements integrated with the enclosure. When properly interfaced, or used with an appropriate safety controller/module, two safety switches monitoring an individual guard can achieve a category 4 level of safety, per ISO 13849-1, it says. Models are available with die-cast aluminum or plastic housing with IP65 glass-reinforced thermoplastic switch housing.