The guard locking device HST-TS1 comprises a lock portion and a lateral locking bolt. It is used as guard locking device on hinged, sliding or removable doors and fl aps. Inserting and trapping the coded key in the HST-TS1 releases the locking bolt allowing the door to open. If the guard locking device is used to protect access to a hazard, measures are required that secure that prior to access the hazardous movements are stopped, for instance by HST-S or HST-M devices. In conjunction with other components, the guard locking device HST-TS1 is used for locking guards in precipitators, quarry machines, or power plants etc.Please note: Not allowable for hazardous areas where full-body access is possible. At guards with full-body access, a model with personal safety key must be installed, e.g. HST-TS2.