Hioki DSM-8542, Instruction Manual, Page: 127 / 140

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9.1.3 Electrical characteristics of signals
(1) Signal logic level
All input and output signals are negative logic (active low).
(2) Handler output signal
The output signal is photocoupler output of the open collector.
The handler must be connected to the power source and pull-up resistance.
The common terminal of the output signals is DC-isolated from the internal circuit.
An equivalent circuit of the output circuit is illustrated in Fig. 9.1.
Output Signal Characteristics
Output Voltage
LOW HIGH
Maximum Output
Current
≤
0.5 V 5 V ~ 24 V 2 mA
[Notice]
Output voltage is HIGH depending on power source voltage connected to the
handler side.
Output voltage is LOW when load resistance with which output current becomes
less than maximum output current is connected.
Fig. 9.1 Handler Output Circuit