Trio Avionics EZ Altitude Control - Manual (Page 12)

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If you have an EZ-2 or EZ-3 altitude hold
system, you will also be required to
connect the electronics control module to
your pitot system. This allows the system
to sense airspeed so that it can limit
Minimum Airspeed and Maximum
Airspeed, allow Climb-on-Airspeed, and
enable Pilot Command Steering (PCS) with
airspeed control (see section 8). Note that
the pitot port is closest to the 25 pin DIN
connector.
5.1 Installing the LCD Switch
The LCD switch is mounted in the control panel by cutting a square
hole the size of the LCD switch bezel. The LCD switch is positioned
behind the control panel, with the LCD screen protruding through the
control panel. Several optional bezels are available from Trio to
facilitate this installation. The switch is secured to the control
panel using the two Philips head screws that are inserted
into the switch housing.
5.2 Installing the Encoder Switch
The encoder switch is attached to the control panel by means of a
threaded mounting shaft that protrudes from the front of the switch
housing. Mounting nuts are included that allow the switch to be
mounted in panels of varying thickness. When placing the switch in
the panel, it is important that the shaft extends out sufficiently to
space the knob away from the panel so that the switch can be fully
activated when pressing in on the knob. If the knob is flush with the
panel, it will not operate properly. Allow at least 1/16 inch clearance. The knob is held to
the switch shaft by a 1/16 inch allen head hex screw.
5.4 Installing the Wiring Harness
A quick check of the schematic at the back of this manual will show that the connectors to
both the LCD switch and the ENCODER module are DB9 connectors. It is important to
assure that the DB9 connector that has TWO cables coming into it is connected to the
LCD module, and that the DB9 connector that has one cable connected to it is attached
to the ENCODER module.