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參數(shù)資料
| 型號： | AZ8430 |
| 元件分類： | 開關(guān) |
| 英文描述： | SNAP ACTING/LIMIT SWITCH, MOMENTARY, 0.011A, 24VDC, PANEL MOUNT |
| 封裝： | ROHS COMPLIANT |
| 文件頁數(shù)： | 14/19頁 |
| 文件大?。?/td> | 646K |
| 代理商： | AZ8430 |
70
WIRING
If the wiring is miswired, the unit may be
damaged. Ensure that the power B is
connected to the red screw, and the
ground v is connected to the black
screw.
Wiring diagram
2. Typical applications
Detection of a snap of threads
When threads are snapped, the ground-
ed rod will touch the antenna and actu-
ate the switches. The force of the
grounded rod can be small because just
touching is enough.
Liquid level control
The switches are actuated when the
antenna touches liquid materials (con-
ductor). Liquid level control like the
detection of overflow is possible.
Measuring equipment
A receptacle (conductor) is lowered
down by the weight of measured objects,
touches the antennas and actuates the
switches. As there is almost no move-
ment differential (MD), accurate mea-
surement is possible.
mm inch
VL-T Mini touch limit switch
(Black)
Load
12/24V DC
(White)
2
1
(Red)
3
Antenna
Internal
circuit
150mA
Max.
Analysis figure
Cable treatment
Cover
Cable
Cover screw
Sealing
Antenna
Operation indicator
Sensitivity
Projection
Body
Terminal screw
adjustment knob
20
911
.354
.787
.433
Applicable connectors
Max. 10
Max. 5.5
3.2 to 3.7 dia.
.394
3.2 to 3.7 dia.
.126 to .146
Max.
.394
10
Max. 5.5
.126 to .146 dia.
.217
Grounding rod
Ground
Detection of hoop materials
When hoop materials (conductor) are
loosened, a motor stops and starts again
when they are pulled.
Detection of cloth and paper
When cloth and paper are removed, the
antenna touches ground and actuates
the switches.
Start
Stop
Grounding
surface
Roller
Cutter
Pilot hole
APPLICATION HINTS
1. Fundamental applications
Detection of grounded objects
The resistance between objects (conduc-
tor) and ground should be less than
500
; if they are grounded. It has noth-
ing to do with the volume of objects.
Detection of ungrounded objects
Detection is possible if the surface area
of objects is large enough and electrosta-
tic capacitance between objects and
ground is more than 20 pF. (more than
approx. 30 cm3) For example, a human
body has more than 60 pF electrostatic
capacitance, therefore it can be detected.
Detection of insulated objects
It is possible to detect insulated objects
by having the antenna touch grounded
metals, making use of the movement of
the objects.
Conductor
less than 500
Detecting body
Touch limit switch
Ground
more than 20 pF
Detecting body
Conductor
Touch limit
switch
Grounded metal
Antenna
Insulated object
Detecting body
Touch limit switch
VL-T (AZ84)
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