Explanation Of Operation - Panasonic LC2H Series Manual

LC2H
2. Backlight type
Contact input
Count Reset
input input
5
1 2 3 4
6
Notes) 1. Do not reverse the polarities when connecting the DC voltage for the backlight.
2. 2 and 4. (The input and reset circuits are functionally insulated.)
3. When using transistor (Tr) input, use the right as a guide. (Collector withstand voltage Q 50 V, leakage current < 1 µA)
4. Be aware that the application of voltage that exceeds the voltage range of the H level to the count input terminal, and the application of voltage to the reset input
terminal, can cause damage to the internal elements.

Explanation of operation

1. Counting takes place when the count
input signal is ON.
2. Counting resumes again when the
count value reaches 99999999 (full scale
value) and then returns to "0" with a new
count input.
3. No measurement takes place when a
reset is input.
1) When reset is ON, resetting takes
place and the count becomes "0".
2) Press the front reset button when you
want to reset manually (only panel
installation type).
Note) Be aware that battery life will decrease if the
count input or reset input are left ON.
Voltage input type
Transistor input
NPN transistor
+V +V
5
Count Reset
1 2 3 4
input input
6
0V 0V
Count input
Reset input
Count value
Note) ❇Count becomes "1" when the reset input is turned OFF while the count signal is being input.
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PNP transistor
+V +V
5
Count Reset
1 2 3 4
input input
6
0 1 99999999
Backlight connection
Green Red
24V DC
5 5
1 2 3 4 1 2 3 4
6 6
24V DC
❇
0 1 0 1