LH2H
2. Backlight type
Voltage input type
Contact input
NPN transistor
Transistor input
PNP transistor
Backlight connection
+V
+V
+V
+V
Green
Red
Start
Reset
24V DC
input
1
2
5
6
3
4
input
Start
input
1
2
3
4
Reset
input
Start
input
1
2
5
6
3
4
Reset
input
1
2
5
6
3
4
1
2
5
6
3
4
24V DC
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. Time measuring takes place when the
start input is ON.
2. When the elapsed (measured) time
reaches full scale it returns to “0”, and
Start input
ON
OFF
ON
ON
then measuring starts again from “0”.
3. When reset input is ON, the display
becomes “0”. You cannot measure during
reset input.
For PC board mounting type the display
disappears while the reset input is ON;
however, the display reads “0” when the
reset input turns OFF.
4. Press the front reset button if you want
Reset input
Full scale
Elapsed time
0
OFF
PC board type
to perform a manual reset (for panel
installation type)
All Rights Reserved ? C OPYRIGHT Matsushita Electric Works, Ltd.
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