The Series 684 indicator alarm module from the IMI Sensors division of PCB Piezotronics provides a solution to machine shutdown protection when increased vibration levels signify potential failure.

These modules are available in various sizes and include up to eight channels in a single NEMA 4X enclosure. ICP® (IEPE) piezoelectric or 4-20 mA sensors interface directly with the system, which is universally powered and provides appropriate excitation voltages. Within each indicator channel is up to four form C relays, for alarm and shutdown control.  Time delays and push button programmable settings allow for simple set-up with no false alarms. Indicator lights on the front of each unit display relay status.