Scientific Development Corporation Minivac 601, Знакомство с устройством, Страница: 18 / 36

EXPERIMENT 8
RELAY CONTROLS ANOTHER
■ his experim ent shows how a re la y may be used to
control another r e la y .
| ) The program for this c irc u it is:
14-/1V 1+/1H 2+/2H
1 V 1 C 1 G /2 C 2 G / 2 A
1 F / l - 2 F /2 - 2 B /2 -
2*3 Turn power O N and m anually
operate re la y
2
by pushing the
p lastic crossbar to the le f t .
See light 2 come O N .
31
Release re la y 2 and m anually
operate re la y 1 . As you push
on the p lastic crossbar
of re la y 1 , re la y 2 w ill c lic k O N
A N D L IG H T 2 W ILL C O M E O N .
The switch contacts of re la y J_
supply power to re la y
2
by closing
the c irc u it to the coil of re la y
2
_.
Release re la y 1 and press pushbutton 1 .
R elay 1 is turned O N by pushbutton 1 ,
re la y 2 is turned O N by the switch
contacts o f re la y
1
, and lig h t
2
is turned
O N by the switch contacts of
relay 2 . Thus, the pushbutton
controls relay
2
through the
contacts of relay
1
.
5>1
It is possible to connect several
relays in a serie s, where each re lay
controls another. Expand the
present c irc u it to use a ll six relays
w ith each re la y controlling the
co il of the n e x t. The last relay
in the series, re la y
6
, should
turn lig h t
6
O N .
The c irc u it looks lik e this:
2 J
2
+.
2H i 2 3 2A