Siemens SIMEAS Q80 Operating Instruction page 113

10.2.4 Digital outputs
SIMEAS Q80 7KG8080 comes with four digital outputs, build as relays contacts.
Example for a digital output with switched voltage and pull-down resistor
The measurement device offers no internal reference voltage. That has to be connected externally.
Note
The contacts are insulated from the measurement system.
If a digital output is set, the relay contact closes and the LED shines.
For the appropriate cable cross-sections, please see the technical specs for the digital
outputs technical data.
· The standard 61000-4-30 requires processing over a span of 10 (for 50 Hz) or 12 periods
(for 60 Hz). By this means, voltage events at this distance (200 ms) are also tested and
signaled by the DO (digital output).
· If a brief voltage dip begins and ends within this processing period, the DO does transmit
this, but after a delay. If the voltage dip begins in one cycle and ends in the next, the
event is indicated by the DO. The signal output lasts at least 200 ms.
· In the worst case, the output by the DO is delayed by ca. 300ms. This delay depends on:
the network frequency, the measurement channel and the demands on the measurement
device.
Connections and Conditioning
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Power Quality Recorder SIMEAS Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 09.02.2011
E-37