Dranetz HDPQ-DN-MZP, Quick Reference Manual

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DIGITAL INPUTS HDPQ-DN-MDIN (optional)
The factory-installed digital input option HDPQ-DN-MDIN is an eight
channel, digital input module, providing users with the capability to
monitor on/off-type digital signals, such as breaker or switch position
indicators.
A logical HI condition is when the voltage level goes above 3.0 volts and
a logical LO condition is when the voltage level goes below 1.0 volts. The
maximum input signal level is 200VDC.
All logic transitions are time stamped to the millisecond and available for
simultaneous comparison to all other data collected by the instrument.
An "event" can be either set to occur on the change of state (edge-
triggered) or at a particular state, HI/LO (level-triggered). Such events
can be used to cross-trigger other instruments to also record data.
The Meter screens will report the present state of the inputs.
Connecting to Digital Inputs
CAUTION
The +V output terminal is rated +5V, 100 mA Max