GLAC01B Honeywell GLA Series Plunger Limit Switch, NO/NC, IP67, SPDT, Die Cast Zinc Housing, 600V ac Max, 6A Max. The GLA series of limit switches belongs to part of the wider GLS range of general purpose limit switches from Honeywell. The GLA Series is a non-plug in solution with a rugged metal construction. These limit switches been designed for worldwide applications and meets the global EN 50041 standard for switch mounting centres.