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参数资料
| 型号： | AZ30249 |
| 元件分类： | 开关 |
| 英文描述： | SNAP ACTING/LIMIT SWITCH, SPDT, MOMENTARY, 4A, 30VDC, 9mm, PANEL MOUNT |
| 封装： | ROHS COMPLIANT |
| 文件页数： | 2/20页 |
| 文件大小： | 603K |
| 代理商： | AZ30249 |
5
Standard glossary
Fixed rating values
The values that guarantee the stan-
dards for the limit switch characteris-
tics and functions. For example, the
rated current and rated voltage,
which are preset conditions (load
type, current, voltage, frequency,
etc.)
Operating object
The mechanism and mountings that
operate the limit switch actuator.
Used for mechanical operators
such as cams and dogs.
Detective object
The unit other than mechanical
mountings that operate the limit
switch. Products, parts, jigs, etc.
Reaction spring (movable spring)
The mechanical part that switches
the limit switch contact is called
either the reaction spring or the
moveable spring.
Contact
When the counter-spring revolves,
power is switched on and off through
the contact between metal parts
Contact gap
The effective clearance between the
fixed contact and the moveable con-
tact. Also called breaking distance.
Contact arrangement
The construction of the electrical
input/output circuit depending on
use. For example, the following two
applications:
Contact type
Used in opposition to a semiconduc-
tor switch that has switching charac-
teristics. Fulfills switch functions
through a mechanical ON/OFF con-
tact.
Terminal mold
After wiring, the connecting part is
molding by epoxy resin for water-
proof, oil-resistant and dust-proof
capabilities.
CONSTRUCTION
Actuator
This part directly detects movement
of the dog, cam, and so forth in the
operating unit, and transmits external
force to the changeover mechanism,
thereby engaging the moveable con-
tact and operating the switch.
Headblock
An independent part of the actuator
mechanism of the Limit Switch.
Wiring vent (cord vent)
The seal on the wiring at the mouth
of the wiring vent. Also called the
conduit vent for the screw hole used
in the wiring.
Terminals
The part of the wiring work in the
wiring that forms the circuit for elec-
trical input and output.
OPERATING CHAR-
ACTERISTICS
Operating Force (O.F.)
The force required to cause contact
snap-action. It is expressed in terms
of force applied to the actuator.
Release Force (R.F.)
The force to be applied to the actua-
tor, at the moment contact snaps
back from the operated position to
unoperated position.
Pretravel (P.T.)
Distance of the actuator movement
from free position to operating posi-
tion.
Overtravel (O.T.)
The distance which the actuator is
permitted to travel after actuation
without any damage to the switching
mechanism.
Total Travel (T.T.)
The distance which the actuator is
permitted to travel from free position
without any damage to the switching
mechanism.
Movement Differential (M.D.)
The distance from operating to
release position of the actuator.
Operating Position (O.P.)
The position of the actuator when the
traveling contact snaps to the fixed
contact.
Release Position (R.P.)
The position of the actuator when the
traveling contact snaps back from
the operating position to its original
position.
Free Position (F.P.)
Position of the actuator when no
force is applied to it.
TECHNICAL INFORMATION
[1 Form C(Single Pole Double Throw)]
F
[1 Form Z(Double Break Double Make)]
COM
F
N.O.
N.C.
N.O.
Cord vent
Front view
Reset spring
Pushbutton
Roller
Cam
Reset spring
Plunger
Roller
Arm
Head block
Pushbutton
Cam
Roller
Actuator
VL limit switch
R.T.
O.F.
F.P.
O.T.T.F.
M.D.
Standard position
O.P.
P.T.
R.P.
T.T.
R.P.
O.T.
M.D.
O. P. Operating position
R.P.
R.F.
O. P. Operating position
P.T. P.T.
Free position
O.T.
M.D.
Note: F.P., O.P., and R.P. are expressed as distances
from the standard position.
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