E-Mon E-PS-A-RTU-N - Manual (Page 65)

Chapter 4 Power
S O F T W A R E G E N E R A L M E T E R S E T U P
PowerSmart+ Advanced Power Quality Meter 65
Using Digital Inputs Using Digital Inputs Using Digital Inputs Using Digital Inputs
The meter is provided with two digital inputs that can trigger the alarm/control
setpoints to give an alarm on input status change, or can be linked to the
energy/TOU registers to count pulses from external watt meters, or gas and water
meters.
To configure them in your device, select the device site from the list box on the
Power Software toolbar, select General Setup from the Meter Setup menu, and then
click on the Digital Inputs tab.
The available options are shown in the following table.
Parameter Options Default Description
Pulse input mode PULSE MODE,
KYZ MODE
PULSE
MODE In pulse mode, either leading, or
trailing edge of the input pulse is
recognized as an event. In 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 For the normal polarity, the open
to closed transition is considered a
pulse. For the inverting polarity,
the closed to open transition is
considered a pulse.
It has no meaning in KYZ mode
where both transitions are used.
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.
The debounce time is used the same for both digital inputs. If you change the debounce
time for one digital input, the same debounce time is automatically assigned to the other.
Using Relay Outputs Using Relay Outputs Using Relay Outputs Using Relay Outputs
The PowerSmart+ Advanced PQM is equipped with two relays. Each relay can be
operated either locally from the alarm/control setpoints in response to an external