University of Minnesota Unmanned Aerial Vehicle Research Lab Avionics Pallet Manufacturing Instructions. 1.
Press in 1/8” 4-40 thread tee-nuts to top side of bottom board in hole locations shown. If necessary, use a clamp to apply pressure so that the three prongs settle in securely with the wood.
Check the daughterboard prior to installation for missing components and unsoldered grounds in the three voltage regulators
Align the daughter board and Rx mux mounting holes with the precut holes shown on the bottom layer mounting board, placing a 0.12” inner diameter 1/8” spacer at each location.
(must be wrapped with heat shrink)
4x H212-ND hex nuts
2x tapped aluminum telemetry modem board fasteners (must be wrapped with heat shrink)
8x 04-00738 machine screws
8x 875K-ND spacers
12x NAS1352-0406P socket head cap screws
215MER-ND auxiliary D-sub connector
250FER-ND 50-pin D-sub connector
6x H216-ND hex nuts
215FER-ND Output D-sub connector
Input D-Sub Connectors
Output D-Sub Connectors
Remove any wires from the Daughter board harness that are not used (Wires 9, 13, 26, 27, 32, 41, 43, 45, 46, 47, 48, 53, 55, 57, 76, 79, 82, 84, 93 of the harness)
Use the wiring diagram to solder pins 30, 31, 32, 34 of the 50 pin connector (I2C connections).
Use the wiring diagram to solder the rest of the wiring harness to the 50 pin connector and RX mux.
Thread the IMU connector through the Top Board hole, and connect it to the J1 connection.
Gently squeeze the top board assembly down onto the bottom board assembly until the wires are bent enough that the board screws (P/N 04-00741) can be secured into the standoffs.
USE CAUTION TO NOT BREAK THE TOP AND BOTTOM BOARDS