Don
Well Known Member
I've powered up my VPX-Pro, updated the firmware, and installed the config file based on my work planning sheet. All of my switches are installed and I'm starting to test out circuits. I supposed I cheated just a little and installed both an Hx as my primary EFIS and an HS as my secondary and checked them out together.
The manual says to wire the primary EFIS to J12-9 and my worksheet had me wire the power to the HS from J10-3. On both devices I tied the power to the Master Avionics Switch. When I flipped the master switch to on, the Hx powered up (not supposed to power up until the Master Avionics Switch comes on). The HS performed exactly as directed - it didn't come on when the Master switch was powered on and it did come on when I flipped the Master Avionics Switch.
I'm pondering if J12-9 might be an "always on" power source. If so, do I need to use it for the primary EFIS? I really don't care to have the EFIS on until after the engine start. I keep thinking I've done something stupid and I keep missing it but I've checked the pins - the EFIS is in J12-9, I've checked and rechecked the switch wires and they're right (as shown by the HS EFIS working properly). There just isn't much I could screw up?but the Hx comes on too when the Master switch is turned on.
Have others used J12-9 for power to their primary EFIS and successfully programmed it to power on with your Master Avionics switch?
The manual says to wire the primary EFIS to J12-9 and my worksheet had me wire the power to the HS from J10-3. On both devices I tied the power to the Master Avionics Switch. When I flipped the master switch to on, the Hx powered up (not supposed to power up until the Master Avionics Switch comes on). The HS performed exactly as directed - it didn't come on when the Master switch was powered on and it did come on when I flipped the Master Avionics Switch.
I'm pondering if J12-9 might be an "always on" power source. If so, do I need to use it for the primary EFIS? I really don't care to have the EFIS on until after the engine start. I keep thinking I've done something stupid and I keep missing it but I've checked the pins - the EFIS is in J12-9, I've checked and rechecked the switch wires and they're right (as shown by the HS EFIS working properly). There just isn't much I could screw up?but the Hx comes on too when the Master switch is turned on.
Have others used J12-9 for power to their primary EFIS and successfully programmed it to power on with your Master Avionics switch?