Panasonic LT4H240ACJ Time Delay Relay, Timer, 1 voltage-free changeover contact 100 - 240 Vac IP66 LT4H240ACJ Data Sheet
Product codes
LT4H240ACJ
50
Display
Contents
Malfunctioning CPU.
Enter reset, RESET key,
or restart unit.
or restart unit.
The values at start-up before the CPU
malfunction occurred.
malfunction occurred.
0
Malfunctioning memory. See
note.
note.
OFF
Output condition
Restoration procedure
Preset values after restoration
5. Self-diagnosis function
If a malfunction occurs, one of the following displays will appear.
Note: Includes the possibility that the EEPROM’s life has expired.
4. Conditions of usage
1) Avoid locations subject to flammable
or corrosive gases, excessive dust, oil,
vibrations, or excessive shocks.
2) Since the cover of the unit is made of
polycarbonate resin, avoid contact with
or use in environments containing methyl
alcohol, benzene, thinners, and other
organic solvents; and ammonia, caustic
sodas, and other alkaline substances.
3) If power supply surges exceed the val-
ues given below, the internal circuits may
become damaged. Be sure to use surge
absorbing element to prevent this from
happening.
1) Avoid locations subject to flammable
or corrosive gases, excessive dust, oil,
vibrations, or excessive shocks.
2) Since the cover of the unit is made of
polycarbonate resin, avoid contact with
or use in environments containing methyl
alcohol, benzene, thinners, and other
organic solvents; and ammonia, caustic
sodas, and other alkaline substances.
3) If power supply surges exceed the val-
ues given below, the internal circuits may
become damaged. Be sure to use surge
absorbing element to prevent this from
happening.
Noise wave form (noise simulator)
Rise time: 1 ns
Pulse width: 1 µs, 50 ns
Polarity: ±
Cycle: 100 cycles/second
Rise time: 1 ns
Pulse width: 1 µs, 50 ns
Polarity: ±
Cycle: 100 cycles/second
5) When connecting the operation power
supply, make sure that no leakage cur-
rent enters the counter. For example,
when performing contact protection, if
set up like that of diagram A, leaking cur-
rent will pass through C and R, enter the
unit, and cause incorrect operation.
Diagram B shows the correct setup.
supply, make sure that no leakage cur-
rent enters the counter. For example,
when performing contact protection, if
set up like that of diagram A, leaking cur-
rent will pass through C and R, enter the
unit, and cause incorrect operation.
Diagram B shows the correct setup.
6) Long periods of continuous operation
in the count-up completed condition (one
month or more) will result in the weakening
of the internal electrical components
from the generated heat and, therefore,
should be avoided. If you do plan to use
the unit for such continuous operation,
use in conjunction with a relay as shown
in the circuit in the diagram below.
in the count-up completed condition (one
month or more) will result in the weakening
of the internal electrical components
from the generated heat and, therefore,
should be avoided. If you do plan to use
the unit for such continuous operation,
use in conjunction with a relay as shown
in the circuit in the diagram below.
• Surge wave form
[± (1.2
[± (1.2
× 50) µs uni-polar full wave voltage]
Peak value
0
0
1.2
50
30
50
90
100
Time (
µs)
Surge voltage (%)
T
T
C
R
(Fig. A)
(Fig. B)
Operation power supply
Leakage current
R
C
Operation power supply
R
R
T
T
R
R
Relay
Timer
Receive output
from contact
at relay R
from contact
at relay R
Load’s
power supply
Inductive load
LT4H timer
Diode rating:
I
F
(forward current): 1 A
V
R
(reverse voltage): 600 V
4) The input signal is applied by the
shorting of each input terminal with the
common terminal (terminal Q for 8-pin
types, terminal E for 11-pin types and
terminal
shorting of each input terminal with the
common terminal (terminal Q for 8-pin
types, terminal E for 11-pin types and
terminal
for screw-down terminal
types). Never connect other terminals or
voltages higher than DC 40 V, because it
may destroy the internal circuitry.
5) Transistor output
(1) Since the transistor output is insulat-
voltages higher than DC 40 V, because it
may destroy the internal circuitry.
5) Transistor output
(1) Since the transistor output is insulat-
ed from the internal circuitry by a pho-
tocoupler, it can be used as an NPN
output or PNP (equal value) output.
(The above example is 11-pin type)
tocoupler, it can be used as an NPN
output or PNP (equal value) output.
(The above example is 11-pin type)
6
Load
Load’s power supply
LT4H timer
{
O
I
As NPN output
Load
Load’s power supply
LT4H timer
As PNP output
{
O
I
(2) Use the diode connected to the out-
put transistor’s collector for absorbing
the reverse voltage from induced loads.
6) When wiring, use shielded wires or
put transistor’s collector for absorbing
the reverse voltage from induced loads.
6) When wiring, use shielded wires or
metallic wire tubes, and keep the wire
lengths as short as possible.
7) For the load of the controlled output,
make sure that it is lower than the rated
control capacity.
lengths as short as possible.
7) For the load of the controlled output,
make sure that it is lower than the rated
control capacity.
4) Regarding external noise, the values
below are considered the noise-resistant
voltages. If voltages rise above these
values, malfunctions or damage to the
internal circuitry may result, so take the
necessary precautions.
below are considered the noise-resistant
voltages. If voltages rise above these
values, malfunctions or damage to the
internal circuitry may result, so take the
necessary precautions.
8) Turning on and off the power supply
while operating in A2* (Power on delay)
or G (Totalizing On delay) will result in a
timer error to be generated due to the
characteristics of the internal circuitry.
Therefore, use the signal input or stop
input.
* Not related to the signal input.
9) When controlling the timer by turning
on the power supply, use only A (Power
on delay 1) or A2 (Power on delay 2).
Use of other modes in this situation will
result in timer errors. When using the
other modes, control the timer with the
signal input or stop input.
10) The operation mode and time range
can be set with the DIP switches on the
side of the timer. Make the DIP switch
settings before installing the timer on the
panel.
while operating in A2* (Power on delay)
or G (Totalizing On delay) will result in a
timer error to be generated due to the
characteristics of the internal circuitry.
Therefore, use the signal input or stop
input.
* Not related to the signal input.
9) When controlling the timer by turning
on the power supply, use only A (Power
on delay 1) or A2 (Power on delay 2).
Use of other modes in this situation will
result in timer errors. When using the
other modes, control the timer with the
signal input or stop input.
10) The operation mode and time range
can be set with the DIP switches on the
side of the timer. Make the DIP switch
settings before installing the timer on the
panel.
Operating voltage Surge voltage (peak value)
AC type
6,000V
DC type
24V AC type
1,000V
Power supply terminals
Input
terminals
AC type
DC type
24V AC type
Noise
voltage
1,500V
1,000V
600V
Note: With the 8-pin type, there is no diode
between points I and O.
02/2003