SV-XPNDR-26X Installation, Configuration, and Testing
SkyView System Installation Guide - Revision K 11-7
Power/Ground Input
The power supply can be 11-33 Volts DC; no voltage adjustment is required. 20 AWG wire is
sufficient for wire runs up to 50’ for this application. Use a 3 or 5 Amp fuse or circuit breaker for
power supply protection to the SV-XPNDR-26X. Note that none of SkyView’s voltage outputs
can provide a sufficient amount of power to power the transponder module. The transponder
must be connected to aircraft power.
Approximate current
consumption at 12 volts DC
Approximate current
consumption at 24 volts DC
Table 42 - SV-XPNDR-26X Power Consumption
It is always good practice to use more than one ground path in an installation. With only one
wire there may be only a single grounding path for the transponder, controller and antenna.
This can allow static electricity to build up and damage your SkyView display(s). Ensuring that
the mounting tray is grounded provides an adequate alternative ground path to protect against
such events. This is particularly important when the transponder is mounted on a non-
conducting surface, such as a composite structure, where the mounting tray is often not
grounded. Therefore, make sure that the mounting tray is grounded in addition to having the
ground wire connected as depicted above.
Note: The transponder power input is not protected against reversed power
connections. Reversing the power and ground inputs to the transponder will
destroy it. Check wiring before applying power.
Pin 1/2 and 12/13 Loopbacks
Pins 1/2, and pins 12/13 must be connected to each other as depicted in the figures above.
Serial RX/TX
All communication between the SV-XPNDR-26X module and SkyView is accomplished via a
single bidirectional a serial connection. To accomplish this:
Choose an unused serial port on each display to connect the SV-XPNDR-26X to. Note
that both the TX and RX sides of the serial port are needed, and both the RX and TX lines
must be connected to all displays in parallel. It is helpful, but not required, to choose the
same numerical serial port on each display. This lets you configure each display’s serial
ports identically.
Connect the SV-XPNDR-26X TX wire (pin 7) to the SkyView serial RX of your choosing. If
you have multiple displays, the transponder TX wire must be connected to a serial RX
wire on each display.
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