Com1 Interface; Com2 Interface - GE MDS Master Station Technical Manual

COM1 Interface

supports the RS-232 serial data format at serial data rates of 300, 1200, 2400, 4800, 9600,
COM1
19200, 38400, 57600, and 115200 bps (asynchronous only).
COM1 is hard-wired as a DCE device.
Number

COM2 Interface

The port supports the RS-232 or RS-485 serial data format at serial data rates of 300,
COM2
1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps (asynchronous only).
Pin Descriptions—RS-232 and RS-485
Pin descriptions for the
82
Figure 6-5 COM1 Connector (RJ-45)
(As viewed from outside the unit)
Table 6-6. COM1 Pin Descriptions
Pin Radio Input/
Output
1 OUT
2 OUT
3 IN
4 --
5 OUT
6 IN
7 OUT
8 IN
data port in RS-232 mode and RS-485 modes are provided below.
COM2
MDS™ Master Station
Pin Description
DSR (Data Set Ready)
DCD (Data Carrier Detect/Link)—A high indicates
signal received.
DTR (Data Terminal Ready)
Ground—Connects to ground (negative supply
potential) on chassis.
RXD (Received Data)—Supplies received data to the
connected device.
Ground—Connects to ground (negative supply
potential) on chassis.
TXD (Transmitted Data)—Accepts TX data from the
connected device.
CTS (Clear-to-Send)—Can be used for flow control or
as an output to key another connected radio.
RTS (Request-to-Send)—Can be used for flow control
or to key the transmitter.
MDS 05-6399A01, Rev. E