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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › Receiver Voltage Before the BEC???
03-10-2014 02:49 PM  4 years agoPost 1
Ironside

rrApprentice

Baltimore, MD

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I am using a 14SG with the 7008SB receiver and a Western Robotics Hercules BEC. If I have one of Futaba's CA-RVIN-700 External voltage cables wired to the ESC for the motor batteries

how would I monitor the actual receiver battery voltage? I know the system automatically shows a receiver voltage but the problem is it's showing the voltage after the BEC (5.4V). I want the voltage before the BEC. In order to get this voltage, would I have to purchase a SBS-01V

and put it on the battery side of the BEC in order to get the actual receiver battery voltage rather than the post BEC voltage? Can you even run both monitors at the same time? Trying to figure out if this will work before I spend the $55 on the sensor.

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03-10-2014 06:46 PM  4 years agoPost 2
knightofcarnage

rrElite Veteran

chicago

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You can use the external voltage wire port. Or you can get an sbus2 voltage sensor. The receiver voltage is a freebee. Both 7008 and 7003 receivers do 2 voltages out of the box (but you still need to buy the cable $11). You can add more voltage sensor by buying sbus2 sensors. I have the similar setup on 700E DFC Pro. External voltage shows me the pack voltage and the receiver show me the regulated bus voltage from the BEC.

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03-10-2014 07:06 PM  4 years agoPost 3
Ironside

rrApprentice

Baltimore, MD

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I use the 7008's external voltage wire port now for the motor packs (12s). That works fine. I was just wondering about an unregulated receiver reading. So if I understand you correctly, your saying if I buy the SBUS2 sensor cable, I could tie that in to the battery side of the BEC and get the unregulated receiver voltage? Correct?

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03-11-2014 02:10 AM  4 years agoPost 4
knightofcarnage

rrElite Veteran

chicago

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Yes you need to monitor a third voltage so you need the sbus sensor. Btw why are you not just using the main pack to power the BEC ? Why the extra weight.

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03-11-2014 08:13 PM  4 years agoPost 5
Ironside

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Baltimore, MD

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I needed the extra weight up front for balance and I like the fact of having a separate power source for the receiver. Just a preference.

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11-18-2014 09:15 PM  3 years agoPost 6
Genty

rrApprentice

Scottish Borders

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I take it that it's okay to connect the external voltage sensor to the R7008SB when the motor and Rx are running off the same 6S lipo. The reason I ask is that the warning on the instructions says-"Turn on the receiver prior to connecting the extra voltage input". When connecting the battery - both will be supplied power simultaneously. Is the warning for safety or could it damage the receiver.

T- Rex 600N Pro, T-Rex 600N Pro, T-Rex 550e

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11-18-2014 09:59 PM  3 years agoPost 7
Ironside

rrApprentice

Baltimore, MD

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You are correct. You can connect it! I haven't had any issues in the time I've had it hooked up.

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11-24-2014 12:11 PM  3 years agoPost 8
Romak

rrApprentice

Scotland

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Hi Guys
I have the Futaba CA-RVIN-700 external voltage cable but a little confused with the instructions. The diagrams show the fuse connected to the negative (black) wire but the text says to solder the fuse to the positive (red) wire.
I'd appreciate if someone could confirm which wire to connect the fuse too.

Rod
14sg....... ;-)

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11-24-2014 01:23 PM  3 years agoPost 9
Kevin Dalrymple

rrKey Veteran

Indianapolis

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While on this topic. Has anyone used a MHA monitor? And which one would you recommend? How dose it hook up?

Synergy Field Rep Rail Blades Field Rep

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11-24-2014 01:26 PM  3 years agoPost 10
dpelletier

rrApprentice

Maynard, MA - USA

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Ultimately I don't think it really matters,
but I put it on the black.

Dany
Not on a Team :(
Synergy E5, Furion 6, Beam E4 - 14sg

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