I have the Jabiru EMS 37-pin harness. I am installing the red cube for fuel flow. It has 3 wires to connect, red, black and white. The harness has a yellow wire instead of white but I assume they to be connected together. The Connector Sensor Map in the installation manual, Table 27, says pin 15 (red) is "not connected". Does this mean that it is not powered and so won't power the red cube?
Red cube wires
- Thread starter wilwood
- Start date
Collant temperature sensor wiring
I have the EMS 25 pin Thermocouple harness. This harness has 6 CHT wires. I have liquid cooled heads so I only need one of the wires to collect the temperature of one head. The wire to each head has two wires in it, one white and one red. I assume one is a ground. Which one, red or white, do I connect to the coolant temp sensor? Does the other wire need to be connected to to complete circuit or do I just leave it not connected?
I have the EMS 25 pin Thermocouple harness. This harness has 6 CHT wires. I have liquid cooled heads so I only need one of the wires to collect the temperature of one head. The wire to each head has two wires in it, one white and one red. I assume one is a ground. Which one, red or white, do I connect to the coolant temp sensor? Does the other wire need to be connected to to complete circuit or do I just leave it not connected?
On your first post: Yes, the yellow goes to the white. Or, put another way, the black wires are ground, the reds are power, and the remaining one is the output signal. I think you might be looking at an older version of the manual where we had an error in that table. The red wire on pin 15 on the D37 connector is the one you want to hook to the red wire on the sensor for power. Grab the latest installation guide here.
On your second post: The D25 harness is ONLY usable with thermocouples. Specifically, the CHTs (the red/white pairs) will only work properly when connected to type J thermocouples, while the EGTs (the red/yellow pairs) will only work properly when connected to a type K thermocouple. What kind of engine are you adapting this to? In short, unless your coolant temperature sensor is one of those types of thermocouples, you won't be able to use the wires on the D25.
Now, it's possible to use an unused general purpose input on the D37 connector to monitor coolant temperature, but you do need to connect it to a sensor that we either sell or support.
Now, it's possible to use an unused general purpose input on the D37 connector to monitor coolant temperature, but you do need to connect it to a sensor that we either sell or support.
Yes, that's right.
mikeasselin
I love flying!
I am trying to test out the flow signal from the red cube FT-60(prior to being able to start the engine). The EMS Display indicates zero flow when I pass a bit of air into the fuel system. I can hear the FT 60 turbine spool up but no flow indication when connected to pins indicated. Does the software require an engine rpm signal to indicate flow on the Skyview?
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You do not need engine RPM or anything else to get fuel flow.
You can spin the turbine via air, but it is possible to spin it so fast that we can't see it, so be gentle.
To test your wiring:
1) Make sure you have about 12V between the black and red wires at the sensor.
2) Short the white wire to the black wire, tapping it on and off. This should give you a few GPH of flow on the screen. You must have either the red or white wire disconnected from the flow sensor when you do this, or it can interfere (but not hurt anything).
If both of the above work, your sensor has an issue.
You can spin the turbine via air, but it is possible to spin it so fast that we can't see it, so be gentle.
To test your wiring:
1) Make sure you have about 12V between the black and red wires at the sensor.
2) Short the white wire to the black wire, tapping it on and off. This should give you a few GPH of flow on the screen. You must have either the red or white wire disconnected from the flow sensor when you do this, or it can interfere (but not hurt anything).
If both of the above work, your sensor has an issue.