Section 40 00-02-0716
2013-06-03 - 32 -
Digital Outputs
ALL OUTPUTS ARE PILOT DUTY. The first 3 outputs (DO 1-3) are B+ FET’s rated 8-32VDC at 1Amp.
The remaining 9 outputs (DO 4-12) are relays rated 30VDC at 5Amps. Consult the engine manufacturer
to determine if the current draw is too large and a separate remote relay is needed.
• 1-Fuel / Ignition / ECU Enable (B+)
• 2-Auxiliary 1 (Tied to Aux Input #1) (B+)
• 3-Alt Excite (B+)
• 4-Throttle Decrease (Murphy Throttle Actuator ATO3069) (Optional Grounded Contact)
• 5-Throttle Increase (AT03069) (Optional Grounded Contact)
• 6-Clutch (SPDT Dry Contacts)
• 7-Common Fail (Dry Contacts)
• 8-Prestart (B-)
• 9-Overspeed (Time Delay Air Damper) (B-)
• 10-Crank (B+)
• 11-Auxiliary 2 (Tied to Aux Input #2) (B-)
• 12-Auxiliary 3 (Tied to Aux Input #3) (B-)
PCBA Shunts
Reference this section for default positions of the Shunt Jumpers on the PCBA’s.
RS485 Terminating Resistor (LK3 Shunt):
This shunt allows for the terminating resistor to be used on the RS485 port. (Default ON)
• ON – (Jumper Installed) allows the terminating resistor to be present.
• OFF – (Jumper Removed) removes terminating resistor from the RS485.
Sender Shunt (LK5 Shunt):
This shunt allows for sender resistor heating (Default ON). This shunt must be installed to use senders.
It can be removed when no senders are being used to reduce heat buildup inside the controller. This is
only of interest in systems with battery voltage of 24VDC.
• ON – (Jumper Installed) Allows sender resistor heating for Mechanical engines using senders.
• OFF – (Jumper Removed) When the program is not using senders this shunt can be removed.
RELAY PCBA SHUNTS:
Throttling Mechanical Engines or Electronic Engines. These shunts allow the user to switch between
FET throttling for Mechanical engines and Relay throttling for Electronic engines.
• LK1 – Default RLY
• LK2 – Default RLY
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