AZ7144 PANASONIC EW, AZ7144 Datasheet - Page 10

• Manufacturer Part Number: AZ7144
• Description: LIMIT SWITCH, ROLLER LEVER, SPDT
• Manufacturer: PANASONIC EW

Specifications of AZ7144

• Actuator Style: Roller Lever
• Operating Force Max: 2.75N
• Contact Voltage Ac Max: 250V
• Contact Voltage Dc Max: 115V
• Contact Current Ac Max: 10A
• Contact Current Dc Max: 400mA
• Switch Terminals: Screw
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TECHNICAL INFORMATION
•
•
•
•
•
•
•
•
•
N.O.
N.C.
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.
Standard glossary
COM
F
F
N.O.
N.C.
[1 Form Z ( Double Break Double Make ) ]
[1 Form C ( Single Pole Double Throw ) ]
N.C.
N.O.
•
•
•
•
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.
VL limit switch
Actuator
CONSTRUCTION
Front view
Roller
Arm
Pushbutton
Roller
Cam
Reset spring
Head block
Reset spring
Pushbutton
Cord vent
Plunger
Roller
Cam
•
•
•
•
•
•
•
•
•
Note: F.P. , O.P. , and R.P. are expressed as distances
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.
O. P. Operating position
OPERATING CHAR-
ACTERISTICS
from the standard position.
O.T.
F.P.
M.D.
R.P.
P.T.
O.P.
Free position
P.T. P.T.
O.F.
Standard position
O. P. Operating position
O.T.T.F.
M.D.
R.T.
R.P.
R.P.
M.D.
R.F.
O.T.
T.T.
5