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Oct 05, 2015 Simplex 6400 time control center We changed one of the scheduled times for the bells to ring, and the keypad active - Cars & Trucks question. Free download simplex 6400 time control center manual PDF PDF Manuals Library. Manual Description: We download simplex 6400 time control center manual can empirical.
This is the interior view of the Simplex Bell control clock. There is one 'bead' for every minute of the day on a continuous chain, which is on a continuous loop. To program a specific time of day for the bells to activate you crimp larger bead onto the chain. The chain rolls under an actuator and when a the set time or 'programed bead' is at the activating point a circuit is closed for one minute. Every minute of the day a second circuit is closed allowing for a short few second period when the bell would be activated.