TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TDFM-7300 Installation & Operating Instructions
TiL 08RE389 Rev A Issue 4
3-4
P1 Connections
(15 Pin [high density] FEMALE D Connector)
Pin #
Description
1 4
MHz
2 8
MHz
3 10
MHz
4 20
MHz
5 40
MHz
6 Audio
5
7 No
connection
8 No
connection
9 No
connection
10 Tune
Indicator
11 Speaker
5
12 Tune
Enable
13 Ground
14 PTT5
15 Mic
5
TABLE 3-3
Wire connections on a 15 Pin [high-density] FEMALE D Connector
3.7
INSTALLATION (WIRING INSTRUCTIONS)
Figure 3-2 shows all required connections and recommended wire sizes for the TDFM-7300
transceiver.
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 5:
J1 (PINS 3, 6, 9), J2 (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 or A711 series) in which case the
shield must be connected to the lo input.
3.11 AUDIO 1, 2, 3, 4, 5 AND COMBINED:
J1(PINS 4, 7, 10) J2 (PINS 5, 2) AND P1 (PIN 6)
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.
