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A-TB72 View Datasheet(PDF) - Panasonic Corporation

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A-TB72 Datasheet PDF : 2 Pages
1 2
Precautions in Using A-TB Time Switches (common)
1256
For cautions regarding each product, please refer to the respective "Precautions in using" sections.
CAUTIONS FOR USE
LIFE FOR TIME SWITCH
Use the time switch in ambient temperatures of -10 °C
to +50 °C +14 °F to +122 °F.
Use Time Switch in ambient humidity of 85 % R.H. or less.
Prevent using Time Switch in such places where
inflammable or corrosive gas is generated, much dust
exists, oil is splashed and considerable shock and
vibration occur.
Since the main body cover is made of polycarbonate
resin, prevent contact with organic solvents such as
methyl alcohol, benzine and thinner, or strong alkaline
materials such as ammonia and caustic soda.
• External surge protection
At a standard
waveform the
Surge waveform [Unipolar full wave voltage of ±(1.2 × 50) μs]
voltage of surge
100
resistance against
90
external surges
is 4,000 V (7,000
50
Peak
V for Flat Time
Switch), however,
30
a surge voltage
in excess of that
may damage the
00
1.2
50
Time (μs)
internal circuit, therefore, please use a surge absorbing
element.
Provide chattering absorbing circuit to control the
circuit in which chattering is a problem.
Provide circuit breaker, fuse or other protective
devices for the side of power supply.
The power failure compensation function provides
compensation if power is supplied continuously to the
time switches. The internal battery is fully charged, but if
the battery capacitance has dropped because of natural
discharging, or if the battery has discharged completely, there
may be times when the switch does not operate immediately
when the power is turned on. If this happens, check to make
sure that the clock is operating normally immediately after the
power is turned on, and then set the clock to the proper time.
CONNECTION METHODS
Item
Average life
Conditions
Contact switching times Approx. 2 × 104 times Resistive load 250 V AC 15 A
Years of use* Approx. 5 years Normal temperature (+25 °C +77 °F)
When the value on the left has been reached, we recommend replacing the product with a new one.
* Average working life will decrease the higher the operating temperature gets (20,000 hours when
+50 °C +122 °F).
PRECAUTIONS CONCERNING WIRING
Connections should be made using wiring of ø 1 to ø 1.6 ø 0.039 to ø 0.063,
or 1.25 to 2 mm2 2 to 3 × 10−3 in2, with a 600 V vinyl insulating sheath.
If connecting wires just as they are
Tighten screws securely
Length of sheath 10±2 mm
to be removed: 0.394±0.079 in
(illustration shows actual size)
Insert the wire until the tip
touches this surface.
Make sure the bare wire is not
exposed beyond this surface.
Using crimp terminals
• Use a crimp terminal with an insulating tube and an open tip (for M3.5 screws).
3.9 mm
0.154 in min.
7 mm
0.276 in max.
The crimp terminal should be
inserted facing the direction
shown in the illustration.
When time switches are directly controlled
If the power supplies for
time switches and the
load are separate
Time switch
M
COM
NO
S1 S2
NC
Power
supply for time
switch
Power supply for load
If the same power supply
is used for time switches
and the load
Connect a crossover
between S2 and COM .
Time switch
M
COM
NO
S1 S2
NC
Crossover
When the electromagnetic breaker and contactor are used in combination
Single-phase
3-phase
Time switch
M COM
NO
S1 S2
NC
Time switch
M COM
NO
S1 S2
NC
Power supply
for time switch
AB
Power
supply for
load
Electromagnetic contactor
Time switch
M COM
NO
S1 S2
NC
Crossover
AB
Power supply
for time switch
Power
supply for
load
13 14 96 95
56
34
12
A
B
Electromagnetic breaker (green power)
Time switch
M COM
NO
S1 S2
NC
Crossover
13 14 96 95
56
34
12
Electromagnetic contactor
A
B
Electromagnetic breaker (green power)
Example of connecting
time switches and remote
control transmitter breaker
The output from Time Switches is a
stand-alone circuit, and is applied to 1 C.
ON COM
OFF
Remote control
transmitter breaker
S1 S2
NC NO COM
Time switch
Load
Note: Please remove the crossover (dotted line) connected to the electromagnetic breaker with case cover.
FIBER
SENSORS
LASER
SENSORS
PHOTO-
ELECTRIC
SENSORS
MICRO
PHOTO-
ELECTRIC
SENSORS
AREA
SENSORS
LIGHT
CURTAINS
PRESSURE /
FLOW
SENSORS
INDUCTIVE
PROXIMITY
SENSORS
PARTICULAR
USE
SENSORS
SENSOR
OPTIONS
SIMPLE
WIRE-SAVING
UNITS
WIRE-SAVING
SYSTEMS
MEASURE-
MENT
SENSORS
STATIC
CONTROL
DEVICES
ENDOSCOPE
LASER
MARKERS
PLC /
TERMINALS
HUMAN
MACHINE
INTERFACES
ENERGY
CONSUMPTION
VISUALIZATION
COMPONENTS
FA
COMPONENTS
MACHINE
VISION
SYSTEMS
UV
CURING
SYSTEMS
Timers
Time
Switches
Counters
Hour
Meters
Options
Limit
Switches
Fan
Motors
Temperature
Controllers
A-TB72/
72Q
 

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