User's Manual

M7X and M7R Page 4-24 Installation
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Facilities Connector
An 8-way RJ48 socket marked FAC that provides connection to various system facilities.
The pin-out is listed in Table 4-11.
The connector has an integral amber indicator that lights when the Inhibit input is active.
Table 4-11 Facilities Connector Pin-Out
Pin Signal Characteristics Input or Output
1 Inhibit
A TTL input that inhibits radio operation. A low
input is required to inhibit the radio.
Input
2 Not connected - -
3 RSSI
0 to 10 V output depending on received signal
strength.
Output
4 Reserved TTL input, active low. Input
5 Reserved
Open collector NPN transistor grounding output,
200 mA maximum, normally open.
Output
6 Standby
0 V input to switch the radio to Standby mode. An
open circuit switches the radio to normal
operation. Note that the front panel Standby
switch must be set to On for this facility to
operate.
Input
7 Ground 0 V. -
8 Supply
When the radio is operating from an ac input, the
output is 24 Vdc (±1 V).
When the radio is operating from a dc input, the
output is between 20 and 32 Vdc.
The Supply output is fused at 500 mA.
Output