Tue Nov 08, 2016 6:47 am
I used a Grässlin DIN-mount time controller for a school bell system I installed. I found it on eBay for about $40 and can run multiple programs at any length of time above one second daily or on selected days. A two-channel clock could be used to activate a weekly test of another program, like attack or fire.
Lex orandi, lex credendi, lex vivendi.