Which of the followings is the oldest controller technology for lift drive systems?

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Which of the followings is the oldest controller technology for lift drive systems?

2007-12-20 23:57:32 · 2 answers · asked by zaCk_ s 1 in Science & Mathematics ➔ Engineering

2 answers

hello,
you seem to have forgotten to put the list!!
any way, consulting a friend of mine (an automation engineer), he said that the oldest type of controllers is a large board with contactors and relays interconnected to each other, that will function as a Logical circuit that will operate the lefts

hope this made some help

2007-12-21 03:53:30 · answer #1 · answered by AboJooJ 3 · 0⤊ 0⤋

The oldest I've seen is an operator controlled
pull rope.

2007-12-21 06:26:35 · answer #2 · answered by Irv S 7 · 0⤊ 0⤋