TECHNISONIC INDUSTRIES LIMITED
TDFM-9200 Installation Instructions
TiL 13RE472 Rev. B
2-7
2.7
INSTALLATION – WIRING INSTRUCTIONS
Figure 2-2(a, b, and c) show all required connections and recommended wire sizes for the TDFM-
9200 transceiver. The TDFM-9200 allows for either a single audio output ground or separate
grounds for each audio output. If a single point ground is required for a pre-existing installation,
the dongle supplied in the installation kit must be plugged into J5. If this is a new installation, it is
recommended to use the isolated ground returns to the audio panel for reduced cross talk
between bands and airframe noise. The audio panel must have isolated grounds for each audio
input (such as Technisonic’s A710, A711, A711L, and TDAP-711) to take advantage of this
feature. There are receive audio, mic audio, and Push To Talk (PTT) lines for each band as well
as two sets of lines combining all six bands. The TDFM-9200 can be wired such that band
selection can be made on the audio panel. Up to 6 positions need to be available on the audio
panel; otherwise, the TDFM-9200 can be wired into one or two positions of the audio panel where
band selection and audio monitoring is done on the TDFM-9200 front panel. An installation can
be wired in a combination of both methods since all inputs and outputs are always active.
2.8
MAIN GROUND – J1 PINS 1 AND 14
Both pins should be connected to power ground. These pins are internally connected to the
chassis.
2.9
MAIN POWER + 28VDC – J1 PINS 2 AND 15
Both pins should be connected to +28 volts DC +/- 15%.
2.10 MIC 1, 2, 3, 4, AND 5 – J1 PINS 3, 6, 9, J6 PIN 6, AND P1 PIN 15
The microphone input signals shall be connected using shielded wire with the shield connected to
ground (pin 1 or 14). It is recommended for best results to leave the other end of the shield
floating to prevent ground currents unless you are connecting to an audio panel with floating hi
and lo inputs (like the Technisonic A710, A711, A711L, or TDAP-711) in which case the shield
must be connected to the lo input. These are individual inputs for each band.
2.11 MIC COMBINED 1 AND 2 – J6 PINS 7 AND 13
The combined mic inputs should be wired and shielded as the individual mic inputs above. These
mic inputs that can be used for any band. Band selection is made at the TDFM-9200 front panel.
2.12 AUDIO 1, 2, 3, 4 – J1 PINS 4, 7, 10, J6 PIN 5, AND P1 PIN 6
These are individual audio outputs from each band. All outputs are 600 ohms impedance. The
output power is 65 mW maximum. Unused outputs do not have to be terminated and should be
left unconnected. These outputs are also found on J5 along with their respective grounds such
that a separate wire bundle can be run with only audio outputs, further reducing the possibility of
cross talk.
2.13 AUDIO COMBINED 1 AND 2 – J6 PINS 2 AND 10
These are combined audio outputs from all bands as selected from the front panel. The
specifications are the same as the individual outputs above.
