Dynon SkyView HDX - SkyView Network

System Overview
2-12 SkyView HDX System Installation Manual - Revision E
2.5 SkyView Network
SkyView displays and SkyView modules use D9M connectors for
“SkyView Network” connections between SkyView displays and
SkyView modules
1
,
2
. This initially causes some confusion because the
same type of connector is used for “RS-232 serial” on PCs and other
(non-SkyView) devices, such as GPS units. The 9-pin SkyView
Network connectors on the back of a SkyView display are shown in
Figure 9 at right.
The specific use of the various pins within the 9-pin SkyView Network
connectors in a SkyView system is unique to SkyView. It is important
to understand that in SkyView, the 9-pin connectors are not
electrically compatible with RS-232 serial connections found on
PCs and other devices. One (1) critical difference is that in a
SkyView Network 9-pin D9F or D9M connector, 3 of the 9 pins
provide power, which, if connected to a RS-232 serial device,
could damage it, or damage the SkyView display. For example, if
you wish to connect a GPS unit that has an RS-232 output, it will not
work and may damage the SkyView or GPS unit. Connect the two (2)
units directly by plugging the GPS’ 9-pin connector into the 9-pin
connectors on the SkyView display.
RS-232 serial devices can be connected to a SkyView system. This
is done via specific pins / wires of the SV-HARNESS-D37 37-pin
connector / harness on the SkyView display. Details of connecting RS-232 serial devices
are explained in Section 2.11, and Section 25: Appendix C: Wiring and Electrical
Connections.
The SkyView Network communicates between the displays and modules as a modern,
multi-drop (serial BUS) network, similar to an old-fashioned telephone party line. A more
modern example of a multi-drop serial network is Ethernet. The SkyView Network wiring
is electrically common between all SkyView Network devices. In the SkyView Network
each Pin 1 of the 9-pin SkyView Network connectors and cables are electrically
connected to every SkyView Network 9-pin connector Pin 1.
The “physical” method of each connection doesn’t matter – electrical connections can be
made with splitters, hubs, multiple SkyView Network connectors on the back of a device
(both connectors are electrically common), etc. All SkyView Network devices “listen” on
the SkyView Network. A SkyView display manages (controls) all communications over
the SkyView Network. For example, if there are two SV32 servos installed, the SkyView
1
The SV-ADSB-472 ADS-B receiver uses a D9F connector that is not compatible with SkyView Network;
see the section SV-ADSB-472 ADS-B IN Receiver Installation for details.
for details.
2
Dynon Avionics AP servos (wired with the SV-NET-SERVO kit) use D9F and D9M connectors (at the
servo) that are not compatible with the SkyView Network; see the section AP Servo Installation and
Configuration for details.
Figure 9: SkyView
Display SkyView
Network Connectors