Datasheet
40
S46HD Series with LIMIT-SWITCHES
Special 46HD Series Helicalohm potentiometer with incorporated Limit-Switch can automatically control the circuit. It
can conveniently be used for minifying the instrument in which this model is employed.
The construction of the Limit-Switch is given in the below figure and its function limit, either upper or lower, or to
either side, can be freely determined according to customer's requirement.
Its capacity is 5 A, 125V.A.C. (or 2.5A, 250V.A.C.)
This model is most recommended to all kinds of automatic control equipment.
Note. Functioning position of Limit-Switch...
In case of this model being coupled to servo-motor, an over-rotation of the servo-motor due to its inertia, after the power source being
OFF, may sometimes break the Helicalohm Pot. unless an adequate precaution is made. In order to avoid such failure, two kinds of the
Helicalohm Potentiometer with limit-switch are offered: one is an inscription type (a) Iimit-switch having its function position slightly this
side from the stopper of Helicalohm Pot. and the other is a circumscription type (b) for which a special overtravel is prepared in the
Helicalohm Pot.
N.B.: Unless otherwise specified, we will supply the circumscription type (b).
●
Outer dimensions of these special versions are the same as those of standard model 46HD Series except its body length which is
longer than the latter by 28 mm.
●
Electrical and mechanical specifications and mounting dimensions are also the same as those of standard model 46HD series.
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As for smaller multi-turn potentiometer with limit-switches, please see page 47.
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Standard Resistance Values ■No. of Wire Turns ■Resistance Wire Used
A
B
C
A
B
C
2
3
1
SW 1
Approx.
45°
Approx.
45°
360° n
CW direction
SW 3
CW direction
A
B
C
A
B
C
2
3
1
SW 3SW 1
Approx.
30°
Approx.
30°
360° n
A
B
C
1
2
3
A
B
C
SW1
SW3
3
±0.2
10
±1
46
±1
3.5
±1
14
±
0.4
4
L
±1
28
±1
M9 P 0.75
6
0
-0.05
Inscription Type (a) Circumscription Type (b)
Resist. Value (Ω)
0.5 1 2 5 10 20 50 100 200 500
556 690 950 1,190 1,515 2,08046HD-3
Resist. Value (Ω) 1k
2,550
2k
2,330
5k
3,225
10k
4,080
20k
5,130
50k
6,890
100k
8,330
200k 500k
3,450 3,230 4,170 5,720 7,410 11,000 12,500
5,400 6,850 6,600 8,550 10,850 14,900 18,850 24,390
7,410 9,510 8,800 11,300 14,500 20,000 25,600 32,250
9.300
Cu-Ni System
11,900 14,100 13,150
Ni-Cr System
16,950 23,250 30,790 38,200 55,550
46HD-3
925 1,275 1,640 2,080 2,86046HD-5
2,000 2,500 3,180 4,35046HD-10
2,530 3,220 4,160 5,71046HD-15
3,030 3,920 5,120 7,14046HD-20
Resist. Wire Used
46HD-5
46HD-10
46HD-15
46HD-20
Resist. Wire Used
Cu-Ni System
Note: Mark shows the pot. with a single-wire resistive element, which gives an essentially infinite resolution.
Mark
*
shows values at special higher practical resistance.