User's Manual

70 MDS Master Station MDS 05-6399A01, Rev. D

under COM2 RS-485 and RS-422 Wiring Arrangement.

Figure 6-6. COM2 Connector (RJ-45)

As viewed from outside the radio

NOTE: COM2 is hard-wired as a DCE device.

Table 6-7. COM2 Pin Descriptions—Radio in RS-232 Mode

Num-

ber

Radio

Input/

Output

Pin Description

1 --

Reserved—Do not connect

2 --

Reserved—Do not connect

3 --

Reserved—Do not connect

4 -

Ground—Connects to ground (negative supply potential) on the

radio’s PC board.

5 OUT

RXD (Received Data)—Supplies received data to the

connected device.

6 IN

TXD (Transmitted Data)—Accepts TX data from the

connected device.

7 OUT

CTS (Clear-to-Send)

8 IN

RTS (Request-to-Send)