User's Manual

C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Page 4-94 Publication No. 150-041118
Section 4 – Electrical Installation Rev C
May 2006
Pin(s) - Signal Name
25 - EXTERNAL GUARD AUDIO INHIBIT
When grounded, will mute audio outputs for the guard receiver.
18 - EXTERNAL CTCSS TONE IN
Provision for modulating the transmitter with audio outside the normal audio
frequency range of 300 to 3000 Hz. Approximately 0.3 Vrms will give 5 kHz
deviation.
27 - TRANSMITTER POWER SELECT
When used with control units not providing transmitter power selector switches,
grounding this line at the mounting rack will provide 10 watts of RF output power.
The C-920 has this line grounded inside the control unit and will provide 10 watts
when used.
65, 66 - 14V SWITCHED
Provision for switched 14 V power from the RT-7200/RT-9600. These pins will
provide 14 Vdc. Exercise caution not to exceed a combined current drain of 500
mA from pins 65 and 66.
64 - PTT OUT
May be used to key external accessories such as Tone Encoders. This pin is
grounded through the microphone PTT switch.