16
controllers, each unit should be floated independently.
7-3-1. Control by resistance (
Ⅰ
)
It is possible to output voltage which is proportional to resistance.
1) Turn off power.
2) Remove the short bar
①－②
.
3) Connect variable resistor R
1
(10k ohms) across 1 and 3 as shown Fig. 7.
Note : R
1
must be 10k ohms. Use a two-core shield cable and connect the shield line to
⑤
. For R
1
select one which will be affected little by temperature changes, aging
effects, and noises.
Fig. 7
Output
voltage
(R
1
≦
10k
Ω
)
V
0
[ V ] :
Output
voltage
V
max
[ V ] : Maximum rated output voltage
R
1
[ k
Ω
] : External resistance
7-3-2. Control by resistance (
Ⅱ
)
It is possible to output voltage which is inversely proportional to resistance. Overshoot
does not occur when switching resistance.
1) Turn off power.
2) Remove the short bar
③－④
and connect variable resistor R
2
across
③
and
④
as
shown Fig. 8. Use a two-core shield cable and connect the shield line to
⑤
.
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
⑫
R
１
＝10kΩ
Two-core shield
×
V
0
Vmax
10
×
R
1
[V]
≒
