Changing The Setting; Power Supplies; Operating Environment - Omron H3CR-A Manual

H3CR
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 Timer may break or malfunction.
Do not use H3CR-A models (except for H3CR-A S) 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 Timer.
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 Timer.
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 Timer 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 Timer 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-
A S), 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. To suppress the volt-
age, apply a CR filter to the power supply line.

Operating Environment

Do not use the Timer 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 Timer.
If the Timer is used in an area with excessive electronic noise, be
sure to separate the Timer, 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 Timer 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 VAC
Output: Basic isolation (see note)
– With clearance of 3 mm and creepage distance of 3 mm at
230 VAC
Note: The 11-pin model ensures basic isolation by itself and also
ensures basic isolation with the 11-pin model mounted to
the OMRON P2CF-11-
Connect the two output contacts different in polarity to the loads so
that they will be the same in potential.
Others
If the Timer is mounted to a control board, dismount the Timer 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 Timer. This protects the internal
circuitry of the Timer from damage.
H3CR
or P3GA-11 Socket.
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