Hioki RM3542 - Chapter 9 Communications (RS-232 C; GP-IB Interface)

8.3 Internal Circuitry
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Electrical Specifications
Input Signals
Input type Optocoupler-isolated, non-voltage contact inputs
(source input, active-low)
Input asserted (ON) voltage 1 V or less
Input de-asserted (OFF) voltage Open or 5 to 30 V
Input asserted (ON) current 3 mA/ch
Maximum applied voltage 30 V
Output Signals
Output type Optocoupler-isolated npn open-collector outputs
(current sink, active-low)
Maximum load voltage 30 V
Maximum output current 50 mA/ch
Residual voltage 1 V (10 mA), 1.5 V (50 mA)
Internally Isolated
Power Output
Output Voltage 4.5 to 5.0 V
Maximum output current 100 mA
External power input none