User`s manual

INSTALLATIONS
18 MB700 User’s Manual
J3, J13, J14, J15: Serial Ports
J3 (COM1) is a DB-9 connector, while J13 (COM2), J14 (COM3) and
J15 (COM4). Refer to the table below for their pin assignments.
COM1 COM2/COM3/COM4
Signal Name Pin # Pin # Signal Name
DCD, Data carrier detect 1 6 DSR, Data set ready
RXD, Receive data 2 7 RTS, Request to send
TXD, Transmit data 3 8 CTS, Clear to send
DTR, Data terminal ready 4 9 RI, Ring indicator
GND, ground 5 10 Not Used
J13 (COM2) is jumper selectable for RS-232, RS-422 and RS-485.
Pin # Signal Name
RS-232 R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX- NC
5 Ground Ground Ground
6 DSR RTS- NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
10 NC NC NC