Dynon SkyView HDX - Sensors Powered by SV-EMS-220

SV-EMS-220 Engine Monitoring System Installation and Configuration
10-4 SkyView HDX System Installation Manual - Revision E
The EMS 37-pin Main Sensor Harness includes a 9-pin connector that is
wired to pins 11 (Orange wire), 12 (Yellow wire), and 30 (Black wire). This
connector is used for other Dynon Avionics products, but is not used in
SkyView installations. Thus, the 9-pin connector should be removed to use
these wires for connecting sensors to the SV-EMS-220. Remove the
connector by cutting the three (3) wires close to the 9-pin connector.
The EMS 37-pin Main Sensor Harness (Dynon Avionics P/N 100399-000)
may be wired with blue and green wires on pins 36 and 37, respectively. If
you are going to use pins 36 and 37 for a thermocouple input such as a CHT
or EGT (this is not possible on the SV-EMS-221 that is used with the Rotax
912 iS, as these wires are reserved for CAN communications), the blue and
green wires should be removed and replaced with the appropriate type of
thermocouple wire for thermocouple functionality on pins 36 and 37. If you
are not going to use these pins for a thermocoduple input, the blue and green
wires do not need to be removed.
All of the ground wires on the SV-EMS-220 D37 are interchangeable, and
can be used for any sensor that requires grounding. Additionally, one (1) of
these wires needs to be grounded to the aircraft locally to provide a good
ground reference for the engine sensors. Use the black ground wire
connected to D37 pin 3 for this purpose.
10.2.3 Sensors Powered by SV-EMS-220
Some sensors use a 5V (pin 18; white/red wire) or 12V (pin 15; red wire) power supply
provided by the SV-EMS-220 module. These outputs are designed to handle a limited
amount of current. The typical Lycoming/Continental/Rotax/Jabiru installations as
described in the rest of this section are designed to not exceed these current limitations.
However, more complex and installations that differ significantly from these standard
installations should be designed to not exceed the following current limitations:
Table 13: EMS Module Current Draw Limits for 12V (Pin 15) and 5V (Pin 18) Outputs
EMS
Module
Output
Pin
Output
Current
Limit
Wire Color
Current Draw of Sensors that Use This Output
12V
15
80mA
Red
EI Fuel Flow Sensor P/N 503380-000: 15mA
UMA Differential Fuel Pressure: 10mA
5V
18
300mA
(Limited
by
internal
self-
resetting
fuse)
White/Red
Kavlico pressure sensors: 5mA
3
rd
party trim and flaps position: 5mA
Manifold pressure sensor P/N 503387-000: 10mA