Drill protection BS GR104
VdS class C (accessories of the EMZ) If the mounting surface of the burglar alarm control panel is an outer wall of the security area and not made of solid construction, the rear wall of the control panel must be monitored for penetration. The drill protection for the rear wall of the housing is part of the VdS approval of the complex/hiplex intrusion detector control panel and is intended for use in the GR104 housing type.