Back Components; Figure 14. Db-9 Connector; Mpi Back View - FreeFlight ADS-B FDL-978 Series Installation Manual

The front of the MPI module consists of a male DB-9 connector. An
MPI can be provided through Serial Port 3 or Port 5 on the ADS-B
equipment DB-44 connector. A female DB-9 connector can be
mounted in the aircraft for easy MPI access to one of these ports
when not connected to other equipment. Standard RS-232 DB-9
connections are shown in the table below:
Female DB-9
PIN SIGNAL PIN
2 Tx J1-42
3 Rx J1-26
5 GND J1-9

3.5.2.1 Back Components

The back of the MPI module consists of a USB micro-AB plug, battery charge light, and an
On/Off switch.
The MPI module includes a rechargeable battery which lasts
approximately 8 hours of usage. The battery can be charged through
the USB micro-AB socket via a USB micro-A or micro-B to USB B
cable connected to a PC USB port or a USB electrical power adapter.
When connected, the battery recharge light comes on and stays
during charging. The light goes off when the module is fully
charged. Charge time is typically about 30 minutes.
The MPI module USB micro-AB connector can also be connected to the ADS-B equipment USB
micro-AB maintenance connector using a USB micro-B to micro-B cable if a DB-9 connector to
Port 5 or 3 is not available.
The On/Off switch turns batter power on and off to the MPI module. The module must be turned
on in order to provide a Wi-Fi connection to an Android device running the ADS-B MPI app.
Using the Android tablet ADS-B MPI application significantly improves system
configuration and troubleshooting through use of a graphical user interface (GUI),
additional and improved automated status feedback, and automatic enforcement
of configuration rules not available with the TC978 or the simple terminal
program MPI interface when configuring the system. The ADS-B MPI application
requires use of either a Serial-to-Wi-Fi Transceiver, FWF-125 (P/N 86943-00),
properly connected to Port 3 or Port 5 or the rechargeable battery powered MPI
Module (P/N 87710-00) properly connected to Port 3 or Port 5.
FFS Copyright © 2015 All rights reserved.
PORT 5 (DB-44) PORT 3 (DB-44)
SIGNAL PIN
232 TxD5 J1-24
232 RxD5 J1-23
SGND4 J1-18
ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev F
Figure 13. DB-9 Connector
SIGNAL
232 TxD3
232 RxD3
SGND2
Figure 14. MPI Back View
3-25