Safety Precautions - Omron H3BA-N Manual

Safety Precautions

CAUTION
Minor electric shock may occasionally occur. Do not
disassemble the product or touch the interior of the Timer.
Minor burns may occasionally occur. Do not touch the
product while power is being supplied or immediately
after power is turned OFF.
Minor fires may occasionally occur. Tighten terminal
screws to a torque of 1.08 N·m so that they do not
become loose.
Minor electric shock may occasionally occur during
operation. Install the terminal cover.
Minor electric shock, fire, or malfunction may occasionally
occur.
Do not allow metal fragments, lead wire scraps, or chips
from processing during installation to fall inside the Timer.
■ Precautions for Safe Use
Please observe the following precautions for safe use of this product.
Environmental Precautions
Store the Timer within specified ratings. If the Timer has been stored
at -10°C or lower, let it stand for 3 hours or longer at room
temperature before turning ON the power supply.
Use the Timer within the specified ratings for operating temperature
and humidity.
Do not operate the Timer in locations subject to sudden or extreme
changes in temperature, or locations where high humidity may result
in condensation.
Do not use the Timer in locations subject to excessive dust, corrosive
gas, or direct sunlight.
Do not use the Timer in locations subject to vibration or shock.
Extended use in such locations may result in damage due to stress.
Install the Timer well away from any sources of static electricity, such
as pipes transporting molding materials, powders, or liquids.
Usage Precautions
Install a switch or circuit breaker that allows the operator to
immediately turn OFF the power, and label it to clearly indicate its
function.
Pay careful attention to polarity to prevent wrong connections when
wiring terminals.
Internal elements may be destroyed if a voltage outside the rated
voltage is applied.
Maintain voltage fluctuations in the power supply within the specified
range.
The Timer uses a transformerless power supply. Do not touch the
input terminals while the supply voltage is being applied, otherwise
an electric shock may occur.
16
Solid-state Timer
H3BA-N
■ Precautions for Correct Use
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.
Connecting the Operating Power
Supply
The H3BA-N@ contains a capacitor-drop power circuit. Use a
sinusoidal power supply with a commercial frequency. Do not use
power supplies with a high frequency component (such as inverter
power supplies) for Timers with 110 or 220-VAC specifications. Using
these power supplies can damage internal circuits.
If voltages other than the rated voltage is applied, the internal
components may be damaged. The internal element (varistor) will be
damaged if a voltage of higher than 100 VAC is applied to the 24-
VDC line.
Connect the power supply voltage through a relay or switch in such a
way that the voltage reaches a fixed value immediately or the Timer
may not be reset or a timer error could result.
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.
If the wiring to the terminal 2 (common terminal for both the power
supply and input signals) is broken, the internal circuit will be
destroyed.
5, 6, 7
G, S, R
Input terminal
Closed
Input/Output
An appropriate input will be applied to the input signal terminals of
the Timer when one of the input terminals (terminals 5, 6, and 7) and
the common terminal (terminal 2) for the input signals are short-
circuited. Do not attempt to connect any input terminal to any
terminal other than the common terminal or to apply voltage across
other than the specified input and common terminals or the internal
circuits of the Timer may be damaged.
(See note 2)
Power supply
AC or DC
5, 6, 7
G, S, R
Input contact
Input terminal
Note: 1. Power supply terminal 2 is a common terminal for the input
signals (G, S, R) to the Timer. Never use terminal 10 as the
common terminal for this purpose, otherwise the internal
circuit of the Timer may be damaged.
2. Do not connect a relay or any other load between these two
points, otherwise the internal circuit of the Timer may be
damaged due to the high-tension voltage applied to the
input terminals.
10
H3BA-N
2
10
H3BA-N
2 (see note 1)