H3CR H3CR
51
Precautions (Common)
Note: The
undermentioned is common for all H3CR models.
Changing the Setting
Do
not change the time unit, time range, or operation mode while the
Timer
is in operation, otherwise the Timer may malfunction.
The
time unit and
time range can be set with the respective selec
-
tors turned clockwise or counterclockwise.
The selectors are of notched so that they will snap when they are
properly set. Do not set the selectors midway between notches,
otherwise
the T
imer may break or malfunction.
Do not use H3CR-A models (except for H3CR-AjS) in flicker
mode, or H3CR-F models at the lowest selector setting. Doing so
may
result in damage to contacts.
Power Supplies
Pay
the utmost attention not to make mistakes in polarity when wir
-
ing
the T
imer.
The H3CR Series uses a transformerless power supply. Do not
touch
the input terminals while the supply voltage
is applied, other
-
wise
an electric shock may be received.
A DC power supply can be connected if its ripple factor is 20% or
less and the mean voltage is within the rated operating voltage
range
of the T
imer.
An
AC power supply can be connected to the
power input terminals
without regard to polarity
. A DC power supply must be connected to
the
power input terminals
as designated according to the polarity of
the
terminals.
Make sure that the voltage is applied within the specified range,
otherwise
the internal elements of the T
imer may be damaged.
Connect
the power supply voltage through a relay or switch in such
a
way that the voltage reaches a fixed value at once, otherwise
the
Timer
may not be reset or a timer error may result.
Be
aware that the operating voltage will rise by 5% if the rated volt
-
age
is applied to the T
imer continuously while the ambient tempera
-
ture
is close to the maximum permissible ambient temperature.
The
power supply circuit of any H3CR-A model
(except for H3CR-
AjS), H3CR-F 100-to-240-VAC model, and H3CR-G model is a
switching
circuit. If the power line connected to the power supply cir
-
cuit has a transformer with high inductance, a counter-electromo-
tive
voltage will be induced by the inductance. T
o
suppress the volt
-
age,
apply a CR filter to the power supply line.
Operating Environment
Do
not use the T
imer in the following locations.
•
Locations with radical temperature changes.
•
Locations with high humidity that may result in condensation.
•Locations with excessive vibration or shock.
•
Locations with corrosive gas or dust.
•Locations where the Timer is exposed to sprayed water, oil, or
chemicals.
Organic solvents (such as paint thinner) as well as strong acid or
alkali
solutions will damage the outer casing of the T
imer.
If the Timer is used in an area with excessive electronic noise, be
sure
to separate the T
imer
, wires, and input device as far as possible
from
the noise sources. Furthermore, it is recommended that the in
-
put
signal wiring be shielded to prevent electronic interference.
Using a surge absorber is recommended if surge voltages occur
.
Precautions for EN61812-1 Confor-
mance
The H3CR Series as a built-in timer conforms to EN61812-1 pro-
vided
that the following conditions are satisfied.
Make sure that no voltage is applied to any terminals before dis-
mounting
the T
imer from the Socket.
The
output section
of the H3CR is provided only with basic isolation.
Provide
supplementary basic isolation on the
load side connected
to
the output so that reinforced isolation required by the EN61812-1
will
be ensured.
The H3CR itself is designed under the following conditions:
•Overvoltage category III
•
Pollution degree 2
•Isolation
Operation parts: Reinforced isolation
– With
clearance of
5.5 mm and creepage distance of 5.5 mm at
230
V
AC
Output: Basic isolation (see note)
– With clearance of 3 mm and creepage distance of 3 mm at
230 V
AC
Note: The
1
1-pin model ensures basic isolation by itself and also
ensures basic isolation with the 11-pin model mounted to
the OMRON P2CF-11-j
or P3GA-1
1 Socket.
Connect
the two output contacts dif
ferent in
polarity to the loads so
that
they will be the same in potential.
Others
If
the T
imer is mounted to a control board, dismount the T
imer from
the control board or short-circuit the control board circuitry before
carrying out a voltage withstand test between the electric circuitry
and
non-charged metal part of the T
imer
. This protects the
internal
circuitry
of the T
imer from damage.