H3DK Datasheet, PDF (27/30 Pages) Omron Electronics LLC – Solid-state Timers

H3DK
● Wiring
The H3DK-H acts like a high-impedance circuit. Therefore, the
Timer may not reset if it is influenced by inductive voltage. To
eliminate inductive voltage, the wires connected to the Timer
must be as short as possible and should not be installed parallel
to power lines. If the Timer is influenced by inductive 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 approx-
imately 120 Ω or a bleeder resistor between the power supply
terminals.
If there is any residual voltage due to current leakage, connect a
bleeder resistor between the power supply terminals.
● Operating Frequency
• The H3DK-H may malfunction if it is used as shown below. Do
not use the H3DK-H in these ways.
Timer Repeatedly Times Out in Cycles of 3 s or Less
Power
3s
or less
3s
or less
Output
In the above case, use the H3DK-M2/-M1 in D mode (signal
OFF delay).
● DC Power Consumptions (Reference Information)
H3DK-M2/-S2
At 24 VDC: 1.2 W max.
H3DK-M1/-S1
At 24 VDC: 1.1 W max.
H3DK-F
At 24 VDC: 1.1 W max.
H3DK-G
At 24 VDC: 1.2 W max.
H3DK-HBS/-HBL At 24 VDC: 1.2 W max.
● Other Precautions
• If the Timer is mounted on a control panel, dismount the Timer
from the control panel before carrying out a voltage withstand
test between the electric circuits and non-current-carrying
EN/IEC Standard Compliance
• Refer to the datasheet for the H3DK for cable selection and
other conditions for compliance with EMC standards.
• The power supply terminals and input terminals are not iso-
lated. There is basic insulation between the power supply ter-
minals and output terminals.
• If double or reinforced insulation is required, use the double or
reinforced insulation defined in IEC 60664 that is suitable for
the maximum applied voltage for the clearance, solid insula-
tion, and other factors.
metal parts of the Timer. (Otherwise, the internal circuits of the
Timer may be damaged.)
• The H3DK-H uses a latching relay for the output. Shock, such
as dropping the H3DK-H during shipment or handling, can
cause the output contacts to reverse to the neutral position.
Check the output status with a tester before using the H3DK-
H.
• The life expectancy of the control output contacts is greatly
affected by switching conditions. Always confirm operation
using the actual conditions and equipment before using the
Timer and make sure that the number of switching operations
presents no problems in performance. If Timer application is
continued after performance has deteriorated, insulation fail-
ure between circuits, burning of the control output relay, or
other problem will eventually occur.
• If the power supply voltage is gradually increased, a power
reset may occur or the Timer may time out. Use a switch,
relay, or other device with contacts to apply the power supply
voltage all at once.
• Make sure that residual voltage or inductive voltage is not
applied after the power turns OFF.
• Error in the operation time of the Timer is given as a percent-
age of the full-scale time. The absolute value of the error will
not change even if the set time is changed. Therefore, always
use the Timer with the set time set as close as possible to the
full-scale value of the set time range.
• When switching a microload, check the specified minimum
load given for the Timer model you are using.
• When setting the operating time, do not turn the dial beyond
the scale range.
• If better accuracy is required in the set time, adjust the dial
while measuring the operation time.
• If the Timer is reset immediately after timing out, make sure
that the circuit configuration allows sufficient resetting time.
Errors will occur in the sequence if there is not sufficient reset-
ting time.
• When directly switching a DC load, the switching capacity will
be lower than when switching an AC load.
Precautions for Compliance with UL Standards
and CSA Standards
Notice to Users of the H3DK in the USA and Canada
Please use the following installation information instead of the
general information in this document in order to use the product
under certified conditions of UL and CSA when the product is
installed in the USA or Canada. These conditions are required by
NFPA 70, National Electrical Code in the USA and the Canadian
Electrical Code, Part I in Canada and may vary from information
given in this document.
• Use an isolated source for power input for the H3DK-@A.
Use an isolated source with external overcurrent protection of
16 A maximum for the source and input. (The input is applica-
ble to the H3DK-M only.)
• Environment
Surrounding Air Temperature: 55°C
• Power Supply: The inputs are non-isolated (applicable to
H3DK-M only).
The same power supply as the main power source must be
used for that for input.
• Pollution Degree
Pollution degree II
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