Hioki DM7275 Series - 11 External Control (EXT I;O); External Control Measurement Process

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ExternalControl(EXTI/O)
The EXT I/O connector on the rear of the instrument provides the following functionality:
• Outputting signals such as the measurement complete signal (EOM signal) and judgment results
signals (HI, IN, LO) from the instrument to an external device
• Controlling the instrument by inputting signals such as the TRIG and KEY_LOCK signals from an
external device.
Outputting or inputting signals
All signals are isolated from the instrument’s measurement circuitry and from ground (but share a
common potential with the input and output common pins).
The instrument’s input circuitry can be switched to support either current sink output (NPN) or
current source output (PNP) (p. 126). Connect the instrument to a control system after reviewing
the input and output ratings, internal circuit architecture, and safety precautions (p. 12), and be
sure to use the instrument as designed.
11.1 ExternalControlMeasurementProcess
Preparations
(1) Checktheinputandoutputspecicationsoftheexternaldevicethatyouareconnecting
to the instrument.
(2) Conguretheinstrument’sNPN/PNPswitch.(p. 126)
(3) Connecttheexternaldevicetotheinstrument.(p. 127)
(4) Congureexternalinputandoutputontheinstrument.(p. 136)
(5) Test input and output. (p. 138)
Measurement
Connect the instrument to the measurement target and perform measurement.
11 External Control (EXT I/O)
External Control (EXT I/O)
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