The Model TSM-1 Test Switch Module from Siemens Building Technologies, Inc. is a key activated momentary switch for use with intelligent duct detectors on the MXL System. It is used in conjunction with a TRI whose CSG-M usage is set to TEST. When the TRI senses the TSM-1 switch closure, it will cause its associated intelligent duct detector to go into alarm. This alarm condition will cause all logic associated with the duct detector to activate. The TSM-1 is mounted on a switch plate and can be installed in a single gang box. Intended for use with intelligent fire, smoke and duct detectors used on Siemens MXL, MXLV and MXL-IQ systems.