User Manual

14.2 External I/O
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14
Chapter 14 External Control
Operation start and stop, data printing, and data saving can be initiated by exter-
nal signals.
The default settings (factory defaults) for each terminal are [START], [STOP],
and [PRINT].
1 Connect the START /EXT.IN1, STOP /EXT.IN2, and PRINT /EXT.IN3 terminals
and the GND terminal to the external signal source device.
14.2.7 External Input (START/EXT.IN1)/(STOP/EXT.IN2)/(PRINT/EXT.IN3)
External Input Signals
Voltage range
HIGH level: 3.0 to 5.0 V, LOW level: 0 to 0.8 V
Pulse width level: 20 ms or greater, LOW level: 30 ms or greater
Maximum input voltage -2 to 7 V
Signal Input Procedure
External signal input
Start measurement
Stop measurement
Print
Save
START /EXT.IN1
STOP /EXT.IN2
PRINT /EXT.IN3
200 Ω
GND
2200 pF
5 V
10 kΩ
HIGH
3.0 to 5.0 V
LOW
0 to 0.8 V
30 ms or
greater
20 ms or
greater
5 V
GND is common. It can be connected to any ground.
Connection procedure:
"14.1 Connecting External Control Terminals" (⇒ p. 388)