The Shaker dust collector timer SH103 is available from Ptronik formerly P Thomas Electronics . The Shaker dust collector timer SH103 is a solid state timer designed to provide an adjustable ON delay and an adjustable ON time to operate a shaker motor. After fan shutdown the voltage free normally open auxiliary contact of the fan contactor closes terminal 7 and 8 of the shaker timer and initiates the ON DELAY (yellow LED on).
Following the initial ON-DELAY time, the ON-TIME will energize the relay (red LED on) for the time set and operate the shaker motor. The ON-DELAY and ON-TIME can be adjusted by the two potentiometers.