SATEC EM920 Operation Manual - Manual (Page 86)

Chapter 5 Configuring the EM920
General Meter Setup
86 EM920 Power Quality and Revenue Meter
Configuring Digital Inputs
The EM920 has two embedded digital inputs (DI1-DI2) and
can provide one additional expansion module with a total of 8
digital inputs (DI3 through DI10). I/O numbers are
automatically assigned to the inputs.
To configure the digital inputs, select General Setup from the
Meter Setup menu, and then click on the Digital Inputs tab.
Digital inputs that are not present in your meter are not
shown.
The available options are shown in the following table.
Parameter Options Default Description
Pulse input mode PULSE MODE
KYZ MODE
PULSE
MODE Pulse mode: either leading, or trailing
edge of the input pulse is recognized as
an event.
KYZ mode: both leading and trailing
edges of the input pulse are recognized
as separate events.
Pulse polarity NORMAL (N.O.)
INVERTING
(N.C.) NORMAL Normal polarity: the open to closed
transition is considered a pulse.
Inverting polarity: the closed to open
transition is considered a pulse. It has no
meaning in KYZ mode where both
transitions are effective.
Debounce time 1-1000 ms 10 ms The amount of time while the state of the
digital input should not change to be
recognized as a new state. Too low
debounce time could produce multiple
events on the input change.