INSTALLATIONS
18
MB800 User’s Manual
J3, J11, J15, J16: Serial Ports
J3 (COM1) is a DB-9 connector, while J11 (COM2), J15 (COM3) and
J16 (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
J11 (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
Содержание MB800
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