Omron Ateg H3DT Series Manual page 33

Datenblatt
Zeitrelais H3DT
H3DT
H3DT
• 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. Always use the same power supply phases.
Contact or transistor for
external input signal
Contact or transistor for
external input signal
• The power supply circuits for H3DT-series Timers use switching
mode. Therefore, if there is a transformer or other device with a large
inductance component on the power supply line, the inductance will
cause a reverse voltage. If that occurs, insert a CR filter in the power
supply line to reduce the reverse voltage.
Environment
• When using the Timer in an area with excessive electronic noise,
separate the Timer and input device as far as possible from the
noise sources. It is also recommended to shield the input signal
wiring to prevent electronic interference.
• The external impulse voltage entering across the power supply
terminals has been checked against a 1.250 s standard
waveform according to JEC-210, Impulse Voltage/Current Test, of
The Institute of Electrical Engineers of Japan. Surge or noise
superimposed on the power supply may damage internal
components or cause them to malfunction. We recommend that
you check the circuit waveform and use surge absorbers. The
effects on components depend on the type of surge and noise that
are generated. Always perform testing with the actual equipment.
• The Timer may be be affected by incoming radio wave
interference. Do not use the Timer near radio wave receivers.
• Do not use the Timer in circuits with waveform distortion. Error will
be large due to waveform distortion.
• Do not install the Timer immediately next to heat sources.
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Wiring
1. Connecting Wires to the Push-In Plus Terminal Block
Part Names of the Terminal Block
<Upper side>
Terminal
(Insertion) hole
Release hole
Connecting Wires with Ferrules and Solid Wires
Insert the solid wire or ferrule straight into the terminal block until the
end touches the terminal block.
<Upper side>
Terminal
(Insertion) hole
Ferrule
Release hole
If a wire is difficult to connect because it is too thin, use a flat-blade
screwdriver in the same way as when connecting stranded wire.
Connecting Stranded Wires
Use the following procedure to connect the wires to the terminal block.
1. Hold a flat-blade screwdriver at an angle and insert it into the
release hole. The angle should be between 10° and 15°.
If the flat-blade screwdriver is inserted correctly, you will feel the
spring in the release hole respond.
2. With the flat-blade screwdriver still inserted into the release hole,
insert the wire into the terminal hole until it strikes the terminal block.
3. Remove the flat-blade screwdriver from the release hole.
<Upper side>
(2)
Wire
(3)
(1)
Flat-blade screwdriver
10 to 15°
Flat-blade
screwdriver
Checking Connections
• After the insertion, pull gently on the wire to make sure that it will
not come off and the wire is securely fastened to the terminal block.
• To prevent short circuits, insert the stripped part of a stranded or
solid wire or the conductor part of a ferrule until it is hidden inside
the terminal insertion hole. (See the following diagram.)
<Upper side>
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<Lower side>
Release hole
Terminal
(Insertion) hole
<Lower side>
Release hole
Ferrule
Terminal
(Insertion) hole
<Lower side>
Flat-blade screwdriver
(3)
(1)
Wire
(2)
Flat-blade
screwdriver
10 to 15°
<Lower side>
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