H3Y Series
36
Safety Precautions
Be sure to read precautions for all models in the website at the following URL: http://www.ia.omron.com/.
Warning Indications
Meaning of Product Safety Symbols
Risk of fire and explosion due to arcing and relay heat
generation that accompanies switching. Do not use in
an environment where flammable or explosive gas is
present.
The service life of the output relay varies widely
depending on switching capacity and switching
conditions. Use only within the rated load and electrical
life count, based on actual conditions of use. Risk of
contact sticking and burning if used past the service
life. Always use a load current that does not exceed the rating, and if
a heater is used, use a thermal switch in the load circuit.
Do not remove the outer casing.
In rare circumstances there is a risk of slight electrical
shock, fire, or device damage. Do not disassemble,
modify, repair, or otherwise touch the inside.
Tighten the screws for the lead wires to the Socket to
the following torque.
PYF Socket: 0.78 to 1.18 N·m
This is the recommended range when crimp terminals
are used.
If the screws are not tightened sufficiently on Front-connecting
Sockets, the lead wires may come off, connection failure may cause
abnormal heating, or fires may occur.
If they are tightened excessively, the screw threads may be damaged.
Confirm that the setting dial, indicators and plastic parts are operating
normally. Depending on the operating environment, the setting dial,
indicators and plastic parts may deteriorate faster than expected,
causing the indicators to fail. Periodically perform inspections and
replacements.
We recommend that you use a surge absorber if surge voltages may occur.
When you dispose of the Timer, do so according to all local
ordinances for processing industrial waste.
• When selecting a control output, use the H3Y-2/H3YN-2/H3Y-2-B/
H3YN-2-B for switching ON and OFF the power and the H3Y-4/
H3YN-4/H3Y-4-B/H3YN-4-B for switching ON and OFF the minute
load. Gold-plated relays are used in the H3Y-4, H3YN-4, H3Y-4-B,
H3YN-4-B, H3YN-4-Z, H3YN-41-Z, H3YN-4-Z-B, and H3YN-41-Z-
B Series.
• Connect the power supply between terminals A1 (13) and A2 (14).
For a DC power supply, connect the negative side to A1 (13) and
the positive side to A2 (14).
• The operating voltage will increase when using the H3Y/H3YN/
H3Y-B/H3YN-B in any place where the ambient temperature is
more than 50°C. Supply 90% to 110% of the rated voltages (at
12 VDC: 95% to 110%) when operating at 45°C or higher.
• Do not leave the H3Y/H3YN/H3Y-B/H3YN-B in time-up condition
for a long period of time (for example, more than one month in any
place where the ambient temperature is high), otherwise the
internal parts (aluminum electrolytic capacitor) may become
damaged. Therefore, the use of the H3Y/H3YN/H3Y-B/H3YN-B
with a relay as shown in the following circuit diagram is
recommended to extend the service life of the H3Y/H3YN/H3Y-B/
H3YN-B.
• The H3YN/H3YN-B must be disconnected from the Socket when
setting the DIP switch, otherwise the user may touch a terminal
imposed with a high voltage and get an electric shock.
• Do not connect the H3Y/H3YN/H3Y-B/H3YN-B as shown in the
following circuit diagram on the right hand side, otherwise the
H3Y's/H3YN's/H3Y-B's/H3YN-B's internal contacts different from
each other in polarity may become short-circuited.
• Use the following safety circuit when building a self-holding or self-
resetting circuit with the H3Y/H3YN/H3Y-B/H3YN-B and an
auxiliary relay, such as an MY Relay, in combination.
CAUTION Indicates a potentially hazardous situation
which, if not avoided, may result in minor
or moderate injury or in property damage.
Precautions for
Safe Use
Supplementary comments on what to do
or avoid doing, to use the product safely.
Precautions for
Correct Use
Supplementary comments on what to do
or avoid doing, to prevent failure to
operate, malfunction or undesirable effect
on product performance.
Used for general prohibitions for which there is no
specific symbol.
Use to indicate prohibitions when there is a risk of
minor injury from electrical shock or other source if
the product is disassembled.
Used for general mandatory action precautions for
which there is no specified symbol.
CAUTION
Precautions for Safe Use
Precautions for Correct Use
Auxiliary relay such as MY Relay
L
2
L
1
L
2
L
1
Correct Incorrect
: H3Y
Auxiliary relay:
MY Relay