I'm changing out a Silent Hectik F4118 to a B&C PMR1D. This plane originally had a Ducati then changed to the SH. There is a small 24ga wire on the regulator connector that terminates on the 25 pin EMS connector. I don't see anything in the Dynon setup for that pin. Is this something left over from the Ducati days or is it required?
Van's Air Force
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small yellow wire on voltage regulator
- Thread starter seagull
- Start date
The original RV-12 had a small yellow wire from the master switch to the Ducati rectifier/regulator "C" terminal.
12 volts on the "C" terminal enabled the regulator and provided voltage sense.
If that wire shorted to ground, it would melt a copper circuit trace on the control board (if the master switch was on).
Bob Nuckolls said, "The "C" lead is indeed a voltage sense lead. Further, it powers the regulation + SCR control circuits."
12 volts on the "C" terminal enabled the regulator and provided voltage sense.
If that wire shorted to ground, it would melt a copper circuit trace on the control board (if the master switch was on).
Bob Nuckolls said, "The "C" lead is indeed a voltage sense lead. Further, it powers the regulation + SCR control circuits."
This wire was connected to the regulator and the other end to pin 21 on the 25 pin connector, (an input to the Skyview).The original RV-12 had a small yellow wire from the master switch to the Ducati rectifier/regulator "C" terminal.
12 volts on the "C" terminal enabled the regulator and provided voltage sense.
If that wire shorted to ground, it would melt a copper circuit trace on the control board (if the master switch was on).
Bob Nuckolls said, "The "C" lead is indeed a voltage sense lead. Further, it powers the regulation + SCR control circuits."
Joe is correct. The yellow wire provides both “Enable” and “Sense” for voltage regulator.This wire was connected to the regulator and the other end to pin 21 on the 25 pin connector, (an input to the Skyview).
This wire goes to pin 21 of the 25-pin D-sub in “Firewall Farward” connector harness. It doesn’t go to the Skyview. It’s switched to the regulator output through one pole or the Mater Switch. On the Skyview version of the RV12 this wire is protected with a soldered in, PCB mounted fuse. As Joe mentioned; on the D180 version this wire is unfused and has no overcurrent protection.
I think the B&C needs this to be +12 to initiate charging - from manual:
"Terminal 6 This is the control input. When power is provided to this terminal, the alternator output will be enabled"
Jim Butcher
You are looking at a different model. B&C make 2 different regulators. The AVC-1 is a drop in replacement for the Ducati and does indeed require +12v to start regulating. The model I am using is PMR1D is a newer design not a drop in but very simple mod. It is less expensive and a much better design. It does require a ground on the “SW” pin to start regulating.
Oops, you're right. I didn't realize B&C has a new regulator. Looks impressive. I really like the screw terminals instead of Fastons. That should solve a lot of problems. Screw terminals are one of the features of the Mike Miller Ducati clone I've been running for many years.
Jim Butcher
Jim Butcher
I put it in yesterday, so far so good. It has precise adjustable output with a 1 turn per .1 volt. The company is very customer focused.Oops, you're right. I didn't realize B&C has a new regulator. Looks impressive. I really like the screw terminals instead of Fastons. That should solve a lot of problems. Screw terminals are one of the features of the Mike Miller Ducati clone I've been running for many years.
Jim Butcher
