Banner Engineering SI Series safety limit switches

Banner Engineering SI Series safety limit switches are designed to effectively monitor the position of a wide variety of guards, gates, covers and other moveable machine fixtures and tooling. The SI Series is available in three models - SI-LM40, SI-LS31 and SI-LS83 - offering various actuating systems, contact arrangements, and housing and mounting configurations to satisfy diverse industrial applications.

Banner’s SI Series feature a limit-switch style, complying with Type 1 per ISO 14119 standards, with actuating elements integrated with the enclosure. Configured with a positive-opening design for the normally closed contacts, per IEC 60947-5-1 standards, these switches provide reliable monitoring regardless of environmental conditions and withstand any attempt to override the switch and defeat the system.

The SI Series offers multiple actuating systems, including plunger, roller, spindle-mount lever and two lever styles. The switches’ actuator head is rotatable in 90° increments. When properly interfaced, or used with an appropriate safety controller or module, two safety switches monitoring an individual guard can achieve a category 4 level of safety, per ISO 13849-1.

Models are available with robust, die-cast aluminium or plastic housing with an IP65 glass-reinforced thermoplastic switch housing. Models housed in plastic resist many aggressive chemicals and liquids found in industrial environments.