Com2 (Data) Connections; Pin Descriptions-Rs-232 And Rs-422/485 Mode - GE MDS SD Series Technical Manual

Pin Descriptions—
RS-232 and
RS-422/485 Mode
MDS 05-4846A01, Rev. D
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-8461-MDS-UP-SD9-MS2ES-Upgrade-Key-SD9-MS-to-SD9-ES.aspx
Table 7. COM1 Pin Descriptions
Pin Radio
Number Input/ Pin Description
Output
6 -- No function
7 -- No function in most applications—User I/O for special
applications
8 --- No function
9 -- No function in most applications—User I/O for special
applications

COM2 (Data) Connections

Typically, the port (Figure 19) is used for connecting the radio to
COM2
an external DTE serial device supporting the RS-232 or RS-485 serial
data format. The radio supports serial data rates of 300, 1200, 2400,
4800, 9600, 19200, and 38400, 57600, 115200 bps (asynchronous only).
Table 8 and Table 9 provide detailed pin descriptions for the
port in RS-232 mode and RS-422/485 modes, respectively.
5 1
9 6
NOTE: The radio is hard-wired as a DCE device.
Table 8. COM2 Pin Descriptions—Radio in RS-232 Mode
Pin Radio
Number Input/ Pin Description
Output
1 OUT DCD (Data Carrier Detect/Link)—A low indicates signal
received.
2 OUT RXD (Received Data)—Supplies received data to the
connected device.
3 IN TXD (Transmitted Data)—Accepts TX data from the
connected device.
4 IN Sleep Mode Input—Grounding this pin places the radio in a
low power consumption mode.
5 -- Signal Ground—Connects to ground (negative supply
potential) on chassis.
6 OUT Alarm Output (DSR)—Behavior is user-configurable. Default
behavior: An RS-232 high/space (+5.0 Vdc) on this pin
indicates an alarm condition. An RS-232 low/mark (–5.0 Vdc)
indicates normal operation.
7 IN RTS (Request-to-Send)—Keys the transmitter.
SD Series Technical Manual
Figure 19. COM2 Connector (DB-9F)
As viewed from outside the radio
data
COM2
23