Honeywell Home EW130 Series, Инструкция по установке и эксплуатации

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English
The pulse outputs of FLYPPER are open collector outputs; there is
no internal current limiting. Depending on the amplitude of the
external supply voltage connected, it may be necessary to insert a
series resistor between the voltage source and the pulse output of
the meter.
The working current during a pulse must not exceed 27 mA.
EXAMPLE OF CIRCUIT FOR PLC
One of the most frequent applications is the connection of the
pulse output to a PLC.
Example: Flypper pulse out / Protection resistor