This standard base is suitable e.g. for use with detectors of the types RM 3 and TM 3.
A short-circuiting spring facilitates the installation and maintenance work. It enables, for example, the testing of automatic signal lines during the construction phase of a building even without the use of detectors. The spring is automatically opened when a detector is inserted into the base, which rules out incorrect operation.
The cable entry may be concealed or surface type. The surface type is realized through break-away openings.