46.0A
total current draw
23
device(s)
Larry's Vans RV-7A
Electrical Load Planning and VP-X Config
Aircraft Overview - Devices

The following devices represent your aircraft, and will be used to generate your personalized
electrical diagram,
VP-X pinout and electrical build
buying guide.
Instruments/Avionics
Garmin G5
|
pin name | actual current draw | circuit breaker value | min wire size |
VP-X pin | backup? | current fault detect? | switch | bank preference |
Garmin G5 |
0.5A |
1.0A | 20g |
J8-8 |
none |
No |
Avionics Master |
Bank A or B |
Dynon SkyView #1
|
SkyView #1 |
2.5A |
5.0A | 20g |
J12-9 |
none |
No |
always on |
Bank A |
notes: With backup battery |
Dynon SkyView #2
|
SkyView #2 |
2.5A |
5.0A | 20g |
J10-2 |
none |
No |
Avionics Master |
Bank B |
notes: With backup battery |
PAR100EX Audio
|
PAR100EX Audio |
2.5A |
3.0A | 20g |
J8-3 |
none |
No |
Avionics Master |
Bank A |
notes: PS Engineering |
Garmin 430
|
GNS 430 pwr |
2.0A |
5.0A | 20g |
J10-4 |
none |
No |
Avionics Master |
Bank B |
GNS 430 com |
1.5A |
10.0A | 18g |
J10-3 |
none |
No |
Avionics Master |
Bank B |
Dynon Transponde
|
SV-XPNDR-261 |
0.4A |
3.0A | 20g |
J8-4 |
none |
No |
Avionics Master |
Bank A |
PAR100EX Radio
|
PAR100EX Radio |
2.0A |
3.0A | 20g |
J12-10 |
none |
No |
Avionics Master |
Bank A |
notes: PS Engineering |
Dynon ADS-B
|
Dynon ADS-B |
0.2A |
1.0A | 20g |
J1-1 |
none |
No |
always on |
Bank A or B |
notes: SV-ADSB-470 |
Lights
Nav Lights LED
|
pin name | actual current draw | circuit breaker value | min wire size |
VP-X pin | backup? | current fault detect? | switch | bank preference |
Lights-Nav |
1.5A |
3.0A | 20g |
J12-1 |
none |
No |
Nav Lights |
Bank A |
notes: AeroLeds Pulsar NS 90s in each wingtip plus the Suntail joined in terminal strip |
Taxi Lt LED
|
Lights-Taxi |
0.7A |
5.0A | 20g |
J8-1 |
none |
No |
Taxi Light |
Bank A |
notes: AeroLeds |
Landing Lt LED
|
Lights-Landing |
0.7A |
5.0A | 20g |
J10-10 |
none |
No |
Landing Light |
Bank B |
notes: AeroLeds |
Strobe Lts LED
|
Lights-Strobes |
8.0A |
10.0A | 18g |
J10-5 |
none |
No |
Strobe Lights |
Bank B |
notes: AeroLeds Pulsar NS90 in each wingtip and Suntail joined in a terminal strip |
Accessories/Ignition/Other
ELT
|
pin name | actual current draw | circuit breaker value | min wire size |
VP-X pin | backup? | current fault detect? | switch | bank preference |
ELT |
0.0A |
5.0A | 20g |
J10-8 |
none |
No |
always on |
Bank A or B |
Dynon Pitot
|
Pitot Heat |
10.0A |
15.0A | 14g |
J10-6 |
none |
No |
Pitot Heat |
Bank A or B |
Boost pump
|
Boost Pump |
1.5A |
5.0A | 20g |
J12-8 |
none |
No |
Boost Pump |
Bank A or B |
Dynon AP Roll Servo
|
AP Roll Servo |
2.5A |
5.0A | 20g |
J10-7 |
none |
No |
always on |
Bank A or B |
Dynon AP P Servo
|
AP Pitch Servo |
2.5A |
5.0A | 20g |
J8-5 |
none |
No |
always on |
Bank A or B |
Fans
|
Fans |
2.0A |
5.0A | 20g |
J12-2 |
none |
No |
always on |
Bank A or B |
Electrical System
Plane Power Pri Alt
|
pin name | actual current draw | circuit breaker value | min wire size |
VP-X pin | backup? | current fault detect? | switch | bank preference |
Alternator Field |
2.5A |
5.0A | 20g |
J12-11 |
none |
No |
Master - Alternator/Battery |
Bank A |
notes: This is the primary alternator field power. Planning an S700-2-10 three position switch with middle batt and up alternator and batt. |
VP-X Pinout and Configuration
Currently configuring
VP-X Pro, 14 volt.
All device pins assigned!
J8 |
| pin |
bank |
VP-X pin name |
power pin name | current draw |
wire size | circuit breaker | switch |
current fault detect |
|
|
1 |
A |
5A-1 output |
Lights-Taxi
|
0.7
|
20
|
5.0
|
Taxi Light
|
No
|
|
power pin notes: AeroLeds |
|
2 |
A |
10A-1 output |
not assigned
|
|
|
|
|
|
|
|
3 |
A |
5A-2 output |
PAR100EX Audio
|
2.5
|
20
|
3.0
|
Avionics Master
|
No
|
|
power pin notes: PS Engineering |
|
4 |
A |
5A-3 output |
SV-XPNDR-261
|
0.4
|
20
|
3.0
|
Avionics Master
|
No
|
|
|
5 |
A |
5A-4 output |
AP Pitch Servo
|
2.5
|
20
|
5.0
|
always on
|
No
|
|
|
6 |
B |
5A-5 output |
not assigned
|
|
|
|
|
|
|
|
7 |
B |
5A-6 output |
not assigned
|
|
|
|
|
|
|
|
8 |
B |
5A-7 output |
Garmin G5
|
0.5
|
20
|
1.0
|
Avionics Master
|
No
|
|
J10 |
| pin |
bank |
VP-X pin name |
power pin name | current draw |
wire size | circuit breaker | switch |
current fault detect |
|
|
1 |
A|B |
Starter Switch |
|
|
|
|
|
|
|
|
2 |
B |
5A-8 output |
SkyView #2
|
2.5
|
20
|
5.0
|
Avionics Master
|
No
|
|
power pin notes: With backup battery |
|
3 |
B |
10A-2 output |
GNS 430 com
|
1.5
|
18
|
10.0
|
Avionics Master
|
No
|
|
|
4 |
B |
5A-9 output |
GNS 430 pwr
|
2.0
|
20
|
5.0
|
Avionics Master
|
No
|
|
|
5 |
B |
10A-3 output |
Lights-Strobes
|
8.0
|
18
|
10.0
|
Strobe Lights
|
No
|
|
power pin notes: AeroLeds Pulsar NS90 in each wingtip and Suntail joined in a terminal strip |
|
6 |
B |
15A-1 output |
Pitot Heat
|
10.0
|
14
|
15.0
|
Pitot Heat
|
No
|
|
|
7 |
B |
5A-10 output |
AP Roll Servo
|
2.5
|
20
|
5.0
|
always on
|
No
|
|
|
8 |
B |
5A-11 output |
ELT
|
0.0
|
20
|
5.0
|
always on
|
No
|
|
|
9 |
|
To GND block |
|
|
|
|
|
|
|
|
10 |
B |
5A-12 output |
Lights-Landing
|
0.7
|
20
|
5.0
|
Landing Light
|
No
|
|
power pin notes: AeroLeds |
J12 |
| pin |
bank |
VP-X pin name |
power pin name | current draw |
wire size | circuit breaker | switch |
current fault detect |
|
|
1 |
A |
10A-4 output |
Lights-Nav
|
1.5
|
20
|
3.0
|
Nav Lights
|
No
|
|
power pin notes: AeroLeds Pulsar NS 90s in each wingtip plus the Suntail joined in terminal strip |
|
2 |
A |
15A-2 output |
Fans
|
2.0
|
20
|
5.0
|
always on
|
No
|
|
|
3 |
A |
10A-5 output |
not assigned
|
|
|
|
|
|
|
|
4 |
|
To GND block |
|
|
|
|
|
|
|
|
5 |
B |
Flap motor |
enabled
|
|
|
5
|
|
|
|
|
6 |
B |
Flap motor |
enabled
|
|
|
|
|
|
|
|
7 |
A |
10A-6 output |
not assigned
|
|
|
|
|
|
|
|
8 |
A |
5A-13 output |
Boost Pump
|
1.5
|
20
|
5.0
|
Boost Pump
|
No
|
|
|
9 |
A |
EFIS power output |
SkyView #1
|
2.5
|
20
|
5.0
|
always on
|
No
|
|
power pin notes: With backup battery |
|
10 |
A |
3A-1 output |
PAR100EX Radio
|
2.0
|
20
|
3.0
|
Avionics Master
|
No
|
|
power pin notes: PS Engineering |
|
11 |
A |
Alternator Field |
Alternator Field
|
2.5
|
20
|
5.0
|
Master - Alternator/Battery
|
|
|
power pin notes: This is the primary alternator field power. Planning an S700-2-10 three position switch with middle batt and up alternator and batt. |
|
12 |
A |
15A-3 output |
not assigned
|
|
|
|
|
|
|
J1 |
| pin |
bank |
VP-X pin name |
power pin name | current draw |
wire size | circuit breaker | switch |
current fault detect |
|
|
1 |
A |
2A-1 output |
Dynon ADS-B
|
0.2
|
20
|
1.0
|
always on
|
No
|
|
power pin notes: SV-ADSB-470 |
|
2 |
A |
2A-2 output |
not assigned
|
|
|
|
|
|
|
|
3 |
|
Roll Trim: +2.5v |
enabled
|
|
|
|
|
|
|
|
4 |
|
Roll Trim: gnd |
enabled
|
|
|
|
|
|
|
|
5 |
|
Roll Trim: pos input |
enabled
|
|
|
|
|
|
|
|
6 |
A |
Roll Trim: motor power |
enabled
|
|
|
|
|
|
|
|
7 |
A |
Roll Trim: motor power |
enabled
|
|
|
|
|
|
|
|
8 |
|
Pitch Trim: +2.5v |
enabled
|
|
|
|
|
|
|
|
9 |
|
Pitch Trim: gnd |
enabled
|
|
|
|
|
|
|
|
10 |
|
Pitch Trim: pos input |
enabled
|
|
|
|
|
|
|
|
11 |
A/B |
Pitch Trim: motor pwr |
enabled
|
|
|
|
|
|
|
|
12 |
A/B |
Pitch Trim: motor pwr |
enabled
|
|
|
|
|
|
|
|
17 |
|
Flap pos input |
enabled
|
|
|
|
|
|
|
|
18 |
|
Flap pos gnd |
enabled
|
|
|
|
|
|
|
|
19 |
|
Flap pos +2.5v |
enabled
|
|
|
|
|
|
|
|
20 |
|
Serial TX |
|
|
|
|
|
|
|
|
21 |
|
Serial GND |
|
|
|
|
|
|
|
|
22 |
|
Serial RX |
|
|
|
|
|
|
|
J2 |
| pin |
bank |
VP-X pin name |
power pin name | current draw |
wire size | circuit breaker | switch |
current fault detect |
|
|
1 |
|
External Switch Input 1 |
Master - Alternator/Battery
|
|
|
|
|
|
|
|
2 |
|
External Switch Input 2 |
Avionics Master
|
|
|
|
|
|
|
|
3 |
|
External Switch Input 3 |
Boost Pump
|
|
|
|
|
|
|
|
4 |
|
External Switch Input 4 |
Landing Light
|
|
|
|
|
|
|
|
5 |
|
External Switch Input 5 |
Taxi Light
|
|
|
|
|
|
|
|
6 |
|
External Switch Input 6 |
Nav Lights
|
|
|
|
|
|
|
|
7 |
|
External Switch Input 7 |
Strobe Lights
|
|
|
|
|
|
|
|
8 |
|
External Switch Input 8 |
Pitot Heat
|
|
|
|
|
|
|
|
9 |
|
External Switch Input 9 |
|
|
|
|
|
|
|
|
10 |
|
External Switch Input 10 |
|
|
|
|
|
|
|
|
11 |
|
Starter annunciator input |
enabled
|
|
|
|
|
|
|
|
12 |
|
Aux battery voltage input |
disabled
|
|
|
|
|
|
|
|
14 |
|
Flap Up switch input |
enabled
|
|
|
|
|
|
|
|
15 |
|
Flap Down switch input |
enabled
|
|
|
|
|
|
|
|
16 |
|
Roll Left switch input |
enabled
|
|
|
|
|
|
|
|
17 |
|
Roll Right switch input |
enabled
|
|
|
|
|
|
|
|
18 |
|
Pitch Up switch Input |
enabled
|
|
|
|
|
|
|
|
19 |
|
Pitch Dn switch Input |
enabled
|
|
|
|
|
|
|
Each column is explained below:
- Pin: the actual pin number on the connector.
- Bank: The VP-X Pro has two independent systems in one box. Each system is referred to as a "bank" of circuits. This column shows which bank that specific power pin is on. See Installation manual for details on determining which device goes on which bank.
- VP-X Pin Name: Describes the function of that pin. 5A-1 for example is a 5 amp circuit and it is the first five amp circuit. 10A-3 is a 10 amp circuit and is the third 10 amp circuit.
- Power pin name: You can give each pin a name that shows on the EFIS display.
- Current draw: The actual current drawn by a device. It is recommended you measure the ACTUAL current draw of each device prior to installation in the aircraft using an ammeter (commonly available from a friend at no cost or from Radio Shack, Sears, and electronic supply stores for a reasonable one).
- Wire size: the wire size you have specified to go between the VP-X and the device being powered.
- Circuit Breaker: The maximum current allowed for that pin. You can enter any value between 1 and the limit of that pin in increments of 1A. This value is equivalent to a circuit breaker or fuse. If a load draws more than the Circuit Breaker value, that circuit will fault. If too large of a breaker value is used, then the wire may overheat or fail. If too small a value is used, then the device may fault the circuit because it draws too much current.
- Switch: The number of the switch input (switch input 1 through 10) you have specified to control this pin. Or it can be set to 'always on' or 'always off'. Each switch input is labeled 1 through 10. You can assign multiple devices to a single switch, and conversely, a switch can control multiple devices. If you set the circuit to 'always on', it will be on anytime the VP-X is powered (i.e. the master switch is on). Multiple pins can be assignedto a single switch. You don't have to use all of the switch inputs.
- Current Fault detect: The pin can be configured to detect a "current fault" or open circuit. When a circuit with this feature enabled is turned on and does not draw any current for 3 seconds, the circuit is faulted. You can use this to detect burned out lights, faulty boost pump, failed avionics fan, or inop heated pitot tube for example. The minimum detectable current is about 100ma, so this should be used on devices like lights, strobes and loads that draw at least 100ma of current.
VP-X Switches
The VP-X allows up to 10 switches, configured to operate any number of connected devices. The following names are suggestions, you can
edit this list as required.
The trim and flap switches are wired to their own dedicated pins. The master switch is wired separately from the VP-X and directly to the master contactor. The Starter switch is wired in between the VP-X and the starter contactor.
Do not include trim, flap, master, or starter switches in the items below. Please see the
VP-X Installation Guide for details.
- Your Switches
-
-
1:
Master - Alternator/Battery
-
2:
Avionics Master
-
3:
Boost Pump
-
4:
Landing Light
-
5:
Taxi Light
-
6:
Nav Lights
-
7:
Strobe Lights
-
8:
Pitot Heat
-
9:
-
10:
Device pins can also be assigned to "always on" or "always off" as required.
VP-X System Settings
Electrical Diagram
Lights-Taxi (5.0A CB, 20awg)
not used
PAR100EX Audio (3.0A CB, 20awg)
SV-XPNDR-261 (3.0A CB, 20awg)
AP Pitch Servo (5.0A CB, 20awg)
not used
not used
Garmin G5 (1.0A CB, 20awg)
Starter Switch
SkyView #2 (5.0A CB, 20awg)
GNS 430 com (10.0A CB, 18awg)
GNS 430 pwr (5.0A CB, 20awg)
Lights-Strobes (10.0A CB, 18awg)
Pitot Heat (15.0A CB, 14awg)
AP Roll Servo (5.0A CB, 20awg)
ELT (5.0A CB, 20awg)
To GND block
Lights-Landing (5.0A CB, 20awg)
Lights-Nav (3.0A CB, 20awg)
Fans (5.0A CB, 20awg)
not used
To GND block
Flap motor
Flap motor
not used
Boost Pump (5.0A CB, 20awg)
SkyView #1 (5.0A CB, 20awg)
PAR100EX Radio (3.0A CB, 20awg)
Alternator Field (5.0A CB, 20awg)
not used
Dynon ADS-B (1.0A CB, 20awg)
not used
Roll Trim: +2.5v
Roll Trim: gnd
Roll Trim: pos input
Roll Trim: motor power
Roll Trim: motor power
Pitch Trim: +2.5v
Pitch Trim: gnd
Pitch Trim: pos input
Pitch Trim: motor pwr
Pitch Trim: motor pwr
Flap pos input
Flap pos gnd
Flap pos +2.5v
Serial TX
Serial GND
Serial RX
Starter annunciator input
not used
Flap Up switch input
Flap Down switch input
Roll Left switch input
Roll Right switch input
Pitch Up switch Input
Pitch Dn switch Input
Master - Alternator/Battery (switch)
Avionics Master (switch)
Boost Pump (switch)
Landing Light (switch)
Taxi Light (switch)
Nav Lights (switch)
Strobe Lights (switch)
Pitot Heat (switch)
(switch)
(switch)
Buying Guide
Some suggestion to help you source your electrical system.
Vertical Power
VP-X Pro
VP-X Pro Wiring Harness
EFIS Manufacturers
Avionics Dealers and Panel Builders
Electrical Supplies
Alternators
Builder Education Resources
Wiring Checklist
Review the following list to be sure you've included everything in your electrical
system planning:
- Alternator field
- Backup alternator field
- Starter
- Pitch trim
- Roll trim
- Yaw trim
- Flaps
- EFIS
- Backup EFIS
- Backup battery for EFIS
- Radios/Nav/GPS
- Audio panel/intercom
- Transponder
- Autopilot
- Avionics fan
- Defrost fan
- CO Detector
- XM Weather receiver
- AOA or stall warning
- Manifold pressure sensor
- Engine monitor
- Cabin lights
- Panel lights
- Seat heaters
- Landing light(s)
- Taxi light(s)
- Strobe lights
- Nav lights
- Fuel boost pump
- Electronic ignition
- Hobbs meter
- Music player, DVD, etc.
- Smoke system
- Power outlets
- Headset power
- Microswitches for doors, canopy, etc.