TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TDFM-7000 Installation & Operating Instructions
TiL 05RE375 Rev n/c Issue 13
3-4
3.7
INSTALLATION - WIRING INSTRUCTIONS
Figure 3-2(a and b) show all required connections and recommended wire sizes for the
TDFM-7000 transceiver. All harness connectors are FFEMALE.
3.8 MAIN GROUND – J1 PINS 1 AND 14
Both pins should be connected to ground. The main ground is internally connected to the
chassis.
3.9
MAIN POWER + 28VDC – J1 PINS 2 AND 15
Both pins should be connected to +28 volts DC +/- 15%.
3.10 MIC 1, 2, 3, 4 AND COMBINED – J1 PINS 3, 6, 9 AND J2 PIN 6; J2 PIN 7 (COMB)
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 or A711 series) in which case the
shield must be connected to the lo input.
3.11 AUDIO 1, 2, 3, 4 AND COMBINED – J1 PINS 4, 7, 10 AND J2 PIN 5; J2 PIN 2
(COMB)
Audio outputs are 600 ohms impedance against ground. The output power is 600 mW
maximum. Unused outputs do not have to be terminated and should be left unconnected.
3.12 PTT 1, 2, 3, 4 AND COMBINED – J1 PINS 5, 8, 11 AND J2 PINS 3; J2 PIN 4
(COMB)
The PTT lines should be floating when in receive and grounded for transmit. The input has a
pull up resistor to 5 volts. Connecting an audio panel that wishes to see more, may result in
no receive audio. Connect a 1N4006 diode in series with the cathode towards the audio
panel in this case.
3.13 TX DATA AND RX DATA – J1 PINS 12 AND 13
These pins provide RS-232 serial communications for use with the RC-7000 remote control
head if installed. Consult the RC-7000 installation manual for details.
3.14 CHANNEL UP AND CHANNEL DOWN – J1 PINS 16 AND 17
These pins can be used to scroll up and down through the zone/channel/mode/talk group
selections for the band currently displayed on the screen. The inputs normally floating are
grounded to activate. Two push buttons or a center off, SPDT, spring loaded toggle switch
are typically used on these inputs. If both pins are grounded simultaneously, the next band
will be selected.
3.15 LH DATA, SB9600 BUSY, OPTB+, CTS OUT, BOOT DIN, RTSBIN AND RS232DIN
– J1 PINS 18 THROUGH 24
These pins are used for programming or updating the transceiver using Motorola Customer
Programming Software (CPS™) or encryption key loading and are left unconnected. They
may be used to update the radio once it is removed from the aircraft. These pins are also
brought out to the TDFM-7000’s front panel mini-DIN connector to allow programming in
the aircraft.
Summary of Contents for TDFM-7000
Page 56: ......
