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RELAY FUNCTIONS
Available relays can be assigned for different uses.
a. None - Assign to “none” when not used.
b. Pre Alarm - Relay will be active when there is a pre alarm condition. Typically used to
drive an alarm horn or lamp. Also can be used to send a signal to a monitoring station.
c. Alarm - Relay will be active when there is an alarm condition. Typically used to drive an
alarm horn or lamp. Also can be used to send a signal to a monitoring station.
d. Pre Alarm & Alarm - Energizes an external audible alarm when a pre alarm or alarm
condition is present. Pressing the ENTER button will silence.
e. Alarm Horn - Energizes an external audible alarm when an alarm condition is present.
Pressing the ENTER button will silence.
f. Engine Run - Relay will be active when engine RPM is greater than 600. Typically used
to drive an auxiliary circuit such as louvers or send a signal to a monitoring station.
g. Low Oil Press Alarm - Relay closes if a low oil pressure shutdown is detected.
h. High Coolant Temp Alarm - Relay closes if a high engine temperature shutdown is
detected.
i. Over Speed Alarm - Relay closes if an over speed shutdown is detected.
j. Over Crank Alarm - Relay closes if an over crank alarm is detected.
k. Low Fuel Level Alarm - Relay closes if a low fuel level shutdown is detected.
l. Low Fuel Prealarm – Relay closes when the fuel tank prealarm level is reached.
m. Low Battery Prealarm – Relay closes when the battery voltage prealarm level is reached.
n. Fuel / Run - Relay will be active during an engine start request and while the engine is
running. Used to drive the engine’s ECU circuit. Also active when requesting active and
stored J1939 codes.
o. High Water Level – Close when a High Water prealarm occurs.
p. Preheat - Relay will be active during programmed preheat period. Used to drive a
preheat relay.
q. Crank - Relay will be active during auto crank period. Used to drive a starter relay.
r. Start Warning – Closes during the countdown to engine start when operating in the
auto start mode.
s. Start & Alarm Horn - Relay will be active during auto start delay period. Typically used
to drive the low side of an alarm horn or light.
t. Unit in Auto – Closes when the controller is in the Auto Start mode
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