User's Manual

M7X and M7R Page 4-26 Installation

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Serial 1 Connector

An 8-way RJ48 socket marked Serial 1 that is used to connect the radio to auxiliary equipment such as

an auto-tune filter or an RCMS.

The pin-out is listed in Table 4-13.

The connector has an integral amber indicator that lights when data is being transferred.

Table 4-13 Serial 1 Connector Pin-Out

Pin Signal Characteristics Input or Output

Data RX A (-)

Data RX B (+)

RS422/485 differential asynchronous data, 9600

baud, 8 data bits, 1 stop bit, no parity, no

handshaking.

Input

3 Not connected - -

Data TX B (+)

Data TX A (-)

RS422/485 differential asynchronous data, 9600

baud, 8 data bits, 1 stop bit, no parity, no

handshaking.

Output

6 Not connected - -

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