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H3DE
Switching Current vs. Ambient Temperature
(When Mounting Two or More H3DE Units Side-by-Side)
70
60
50
40
30
20
0
1
2
3
(Measurement Condition: Input voltage of 230 VAC)
Input/Output
Relationship between Input and Power Supply
Circuits
AC/DC
power
Input circuit
supply
Since the input circuit and the power supply circuit are configured
independently, the input circuit can be turned on or off irrespective of
the on/off state of the power supply.
It must be noted that a voltage equivalent to the power supply volt-
age is applied to the input circuit.
When connecting a relay or a transistor as an external signal input
device, pay attention to the following points to prevent short-circuit-
ing due to a sneak current to the transformerless power supply.
If a relay or transistor is connected to two or more Timers, the input
terminals of those Timers must be wired properly so that they will not
be different in phase or the terminals will be short-circuited to one
another (refer to the figures below).
34
Mounting clearance:
50 mm min.
Mounting
clearance: 10 mm
Maximum range of
operating ambient
temperature
Mounting
clearance: 5 mm
Mounting
clearance: 0 mm
Load current (A)
4
5
B1
A1
Power supply
circuit
A2
Contact or transistor for
external input signal
B1
Incorrect
Short-circuit
current
B1
Contact or transistor for
external input signal
B1
Correct
Short-circuit
current
B1
The H3DE Series is provided with a transformerless power supply
system.
Wiring (H3DE-H)
The H3DE has a high impedance circuit. Therefore, the H3DE may
not be reset if the H3DE is influenced by inductive voltage. In order
to eliminate any influence of inductive voltage, the wires connected
to the H3DE must be as short as possible and should not be
installed alongside power lines. If the H3DE is influenced by induc-
tive voltage that is 30% or more of the rated voltage, connect a CR
filter with a capacitance of approximately 0.1 µF and a resistance of
approximately 120 Ω or a bleeder resistor between the power sup-
ply terminals. If there is any residual voltage due to current leakage,
connect a bleeder resistor between the power supply terminals.
Operation (H3DE-H)
An interval of 3 s minimum is required to turn on the H3DE after the
H3DE is turned off. If the H3DE is turned on and off repeatedly with
an interval of shorter than 3 s, the internal parts of the H3DE may
deteriorate and the H3DE may malfunction.
3 s min.
Power
Output
state 1
Output
state 2
If it is required that the output be turned on repeatedly with an inter-
val of shorter than 3 s, consider use of the H3DE-M2/-M1 in mode D
(signal OFF-delay).
H3DE
A1
H3DE
Power supply
A2
A1
H3DE
A2
A1
H3DE
Power supply
A2
A1
H3DE
A2
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