E-Mon E-PS-A-RTU-N - Manual (Page 66)

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
66 PowerSmart+ Advanced Power Quality Meter
event, or by a remote command sent through communications, and can also be
linked to an internal pulse source to produce energy pulses.
The available relay options are shown in the following table:
Parameter Options Default Description
Unlatched mode: the relay goes into its
active state when the control setpoint is
in active (operated) state, and returns
into its non-active state when the
setpoint is released. Operation
mode UNLATHCED
LATCHED
PULSE
KYZ
UNLATCHED
Latched mode: the relay goes into its
active state when the control setpoint
goes into active state and remains in
the active state until it is returned into
its non-active state by a remote
command.
Pulse mode: the relay goes into its
active state for the specified time, goes
into non-active state for the specified
time and remains in the non-active
state.
KYZ mode: the relay generates
transition pulses. The relay output state
is changed upon each command and
remains in this state until the next
command.
Polarity NORMAL
(N.O.)
INVERTING
(N.C.)
NORMAL With normal polarity, the relay is
normally de-energized in its non-active
state and is energized in its active
(operated) state.
With inverting polarity, the relay is
normally energized in its non-active
state and is de-energized in its active
(operated) state. It is called failsafe
relay operation.
Retentive
mode NO
YES
NO Applicable for latched relays.
In non-retentive mode, the relay always
returns to its non-active state upon
power up.
In retentive mode, the relay status is
restored to what it was prior to loss of
power.