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APPENDIX
SUPERVISION FEATURE
The Supervision Feature is a great way for checking at a glance the integrity of communications between the trans-
mitter and receivers. The supervision feature is designed to work with only one transmitter per system as the su-
pervision feature’s timer can operate on multiple receivers at the same time. When function 9 (Refresh) is turned
on in the transmitter, it will send out a check-in signal
(technically it’s a command telling each receiver on the
system to reset it’s supervision timer, i.e. system is working properly
) every 45 minutes. If the check-in signal is
not heard by the receiver before the internal supervision timer expires, due to transmitter or receiver issues, the
receiver will then look at its function switches (7, 8 or 9) and take the selected course of supervision action. See
below.
Receiver’s Supervision/Fail Safe action:
If Function 8 is on in the receiver and the supervision timer does not get reset by the transmitter’s check-
in signal the supervision LED will begin to blink continuously. No action will be performed by the receivers re-
lay. The supervision LED will continue to blink until either the receiver receives the transmitter’s check-in signal
or the receiver is reset by pressing the reset button, if equipped, or by cycling the power to the receiver.
If Function 7 (Fail Safe Scenario 1) is on in the receiver and the supervision timer does not get reset by
the transmitter’s check-in signal the supervision LED will begin to blink continuously. This will also activate the
receivers relay which will close or open your contacts,
(N.C. / N.O.)
possibly triggering an alarm, call out system,
deactivate an external relays coil or trip a tattletale circuit to stop the device it is controlling. The supervision LED
will continue to blink and the receivers relay will stay activated until either the receiver receives the transmitter’s
check-in signal, a relay reset command from the transmitter or the receiver is reset by pressing the reset button, if
equipped, or by cycling or losing power to the receiver.
Operational Note
: When using Fail Safe Scenario 1, the receiver’s relay is energized and if power is lost
while the receiver is in Fail Safe operation, the receiver’s relay will de-energize. When power is restored, the re-
ceivers relay will not immediately go back into Fail Safe operation. The receivers relay will remain de-energized
and the device it is controlling may restart. The receiver will not go into Fail Safe operation again until it’s super-
vision timer has expired again. If this situation occurs, a tattletale device that does not recycle when the power
comes back on, should be installed to hold the circuit as needed for your situation.
If Function 9 (Fail Safe Scenario 2) is on in the receiver and the supervision timer does not get reset by
the transmitter’s check-in signal the supervision LED will begin to blink continuously. This will also deactivate
the receiver’s relay, if currently activated, which will close or open your contacts,
(N.C. / N.O.)
possibly trigger-
ing an alarm, call out system, deactivate any external relays coil or trip a tattletale circuit to stop the device it is
controlling. The supervision LED will continue to blink until either the receiver receives the transmitter’s check-
in signal or a relay ON or OFF command from the transmitter.
Transmitter Setting for Supervision/Fail Safe Operation at the Receiver:
Function 9 (
Refresh - sends checking in signal every 45 min.
)
This function must be turned on in the transmitter so the transmitter will send out the signal to make the receiver(s)
supervision timer reset. IF the transmitter does not have this function turned on the absence of the refresh/check in
signal will cause the reciver(s) to go into Supervision or a Fail Safe action.
Testing Supervision/Fail Safe Operation:
A good way to test the Supervision/ Fail Safe Operation is to turn off function switch 9 on the transmitter,
so it will no longer send the refresh/check-in signal. Once the receiver’s supervision timer has expired,
(may take
up to 3 hrs depending on the version of software the receiver is operating)
the Supervision LED will begin to blink
and depending upon the Fail Safe scenario you have chosen, the receivers relay will activate or de-active.
