Maple Systems OMI5100A-CE - Manual (Page 12)

OMI5000 Series Operating Manual 8
Maple Systems 1010-1012 Rev 02 www.maplesystems.com
Note that although the com port number setting is the same, different connections are required for
using RS-232 or RS-422/485. The pin outs for each port are shown.
COM1 [RS-232]/COM2 [RS-232]
Pin out of DE9P (male) connector
Pin # COM1[RS232] COM2[RS232]
1
2 RXD
3 TXD
4 TXD
5 Signal Ground
6 RXD
7 RTS
8 CTS
9
COM1 [RS-485 2/4 W] Port , COM3[RS-485], COM3[RS-232] Port
Pin out of DE9S (female) connector
 Restrict cable length to less than 500 feet (150m) for RS-422/RS-485 devices and less than
50 feet (15m) for RS-232 devices in order to avoid communication problems.