Electronics International FP-5L - Manual (Page 10)

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11. (FP-5L Only) Connect the RS-232 Output Line:
Connecting the FP-5L Output Line to a compatible GPS unit allows the GPS unit to use the fuel data
transmited by the FP-5L. The FP-5L has three GPS Transmit Formats: 1. "Ot1" outputs older Shadin fuel flow
data (for Arnav, King and newer Garmin GPS units); 2. "Ot2" outputs the Shadin fuel flow sentence (for Garmin
and other GPS units); 3. "Ot3" outputs a modified Shadin Fuel/Airdata sentence (for UPS GPS units). The GPS
unit may require some setup. You may want to contact a knowledgeable instrument shop or the GPS factory to
help with the hookup and setup of the GPS unit. See the "Power-Up Programmable Settings" section in the
FP-5(L) Operating Instructions to configure the FP-5L RS-232 output.
Connect the FP-5L RS-232 Output Line (White/Green Wire) to the GPS RS-232 Input Line. Do not connect
any GPS shield wires to the FP-5L. They should be left open.
12. Install the Fuel Flow Differential Module (FFDM-1):
If your engine is equipped with a fuel return line from the carburetor back to the fuel tank, install the
FFDM-1 in the aircraft as oulined below (see diagram at the back of this manual). Otherwise, omit this step.
A. Connect the circular connector to the FFDM-1.
B. Install the FFDM-1 under the instrument panel using two tie wraps on each end of the module to support
it to a wire bundle or bracket.
C. Route and connect the 3' red power lead to the 12 or 24 volt bus via a 1 amp fuse.
D. Route and connect the 3' black ground lead to the same ground used for the FP-5.
E. Route and connect the 6' red, black and white leads marked "Feed" to the flow transducer installed in the
fuel line from the fuel pump to the carburetor.
F. Route and connect the 6' red, black and white leads marked "Return" to the flow transducer installed in
the return fuel line from the carburetor to the fuel tank.
G. Connect the 1' red, black and white leads to the same color 6' leads from the FP-5.
H. Be sure the connectors mate properly. If the tab inside the male connector gets bent, it can wedge itself
between the red nylon and metal female receptacle. This can result in an intermittent connection after
about a month or more. If the connectors are disconnected several times the female connector can
become loose. If this happens use a pair of needlenose pliers and tighten the metal receptacle inside the
female connector.
Any excess wires can be rolled up and tie wrapped under the instrument panel. Tie wrap these wires
so they do not obstruct the freedom of travel of any controls. If you decide to cut these wires to a
specific length, strip each wire and double the wires over. An extra set of connectors is provided in the
kit. Double crimp each connector. Doubling the wires over and a good crimp are critical.
Note: The flow transducers for the FFDM-1 and the FP-5 MUST be of the same model (i.e., if the FP-5
uses an FT-60 flow transducer, then the FFDM-1 must use a FT-60 flow transducer).
Rev. I: 7/2/02