Panasonic LC2H preset Page 7 Manual Download

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LC2H

3) Since the current flow is very small from
reset input terminal

, please use relays

and switches with high contact reliability.
4) When inputting a reset with an open
collector of a transistor, use a transistor
for small signals in which ICBO is 1 µA or
less and always input with no voltage.
5) To reset externally, short reset input ter-
minals

and

on the rear.

6) Input uses a high impedance circuit;
therefore, erroneous operation may occur
if the influence of induction voltage is
present. If you plan to use wiring for the in-
put signal that is 10 m or longer (wire ca-
pacitance 120 pF/m at normal
temperature), we recommend the use of a
CR filter or the connection of a bleeder re-
sistor.

4. How to reset multiple panel mount-
ing type counters all at once (input is
the same for count)
Non-voltage input type

Notes) 1. Use the following as a guide for choosing

transistors used for input (Tr).
Leakage current < 1 µA

2. Use as small a diode (D) as possible in the

forward voltage so that the voltage between
terminals 3 and 4 during reset input meets
the standard value (0.5 V).
( At IF = 20 µA, forward voltage 0.1 and
higher.)

Voltage input type

Note) Make sure that H (reset ON) level is at least 4.5

5. Backlight luminance

To prevent varying luminance among
backlights when using multiple Backlight
types, please use the same backlight
power supply.

6. Insulation sheet

Before using a panel mounting type,
please pull and remove the insulation
sheet from the side of the product in the
direction of the arrow.
In consideration that the product might be
stored for long periods without being
used, an insulation sheet is inserted be-
fore shipping. Remove the insulation
sheet and press the front reset button.

One-touch installation type

Installation frame type

7. Waterproof construction (Installa-
tion frame type)

The operation part of the panel installa-
tion type (Installation frame type) is con-
structed to prevent water from entering
the unit and a rubber gasket is provided to
prevent water from entering the gap be-
tween the unit and the panel cutout. There
must be sufficient pressure applied to the
rubber gasket to prevent water from enter-
ing. Be sure to use the installation rein-
forcement screws when installing the
frame (ATH3803).

Note) The one-touch installation type is not

waterproof.

8. Do not use in the following environ-
ments

1) In places where the temperature
changes drastically.
2) In places where humidity is high and
there is the possibility of dew. (When dew
forms the display may vanish and other
display errors may occur.)

9. Conditions of use

1) Do not use in places where there is
flammable or corrosive gas, lots of dust,
presence of oil, or where the unit might be
subject to strong vibrations or shocks.
2) Since the cover is made of polycarbon-
ate resin, do not use in places where the
unit might come into contact with or be ex-
posed to environments that contain or-

ganic solvents such as methyl alcohol,
benzene and thinner, or strong alkali sub-
stances such as ammonia and caustic so-
da.

10. Cautions regarding battery replace-
ment

1) Remove wiring before replacing the
battery. You may be electrocuted if you
come into contact to a part where high
voltage is applied.
2) Make sure you are not carrying a static
electric charge when replacing the bat-
tery.
3) Battery replacement procedure

One-touch installation type

1. Using a tool remove the up/down hook
of the case.
2. Pull the unit away from the case.
3. Remove the battery from the side of the
unit. Do not touch the display or other
parts.
4. Before inserting wipe clean the surface
of the battery.
5. Insert the battery with the + and – sides
in the proper position.
6. After replacing the battery return the
unit to the case. Verify that the hook of the
case has properly engaged.
7. Before using press the reset button on
the front.