GE MDS Master Station Technical Manual page 87

In addition to RS-485 mode, the radio is capable of operating in RS-422 mode. Config-
ure the port for RS-485 but follow the RS-422 wiring arrangements shown in below un-
der COM2 RS-485 and RS-422 Wiring Arrangement.
COM2 is hard-wired as a DCE device.
Table 6-7. COM2 Pin Descriptions—Radio in RS-232 Mode
Number
Table 6-8. COM2 Pin Descriptions—Radio in RS-485 Mode
Pin
Number
MDS 05-6399A01, Rev. E
Figure 6-6. COM2 Connector (RJ-45)
(As viewed from outside the radio)
Pin Radio
Pin Description
Input/
Output
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)
Radio
Input/
Pin Description
Output
MDS™ Master Station 83