Unpacking and Installation
MNC-0300-070
18 of 22
Revision 1
COM1 is an RS-232 only serial interface. The configuration for
COM1 is done via the set-up menu on the front panel. Table 6,
RS-232 Pinouts, lists the pinouts for COM1.
COM2 can be configured (via the set-up menu) as an RS-485
2-wire serial interface or as an RS-485 4-wire serial interface.
The pinouts for the COM2 interface are listed in Table 7, Pinouts
for the COM2 Intereface, and typical implementations are shown
in Figure 9, Typical RS-485 2-Wire Duplex Implementation and
Figure 10, Typical RS-485 4-Wire Full Duplex Implementation.
Table 6, RS-232 Pinouts
Pin No.
Function
1
No Connection
2
RXD—Received Data (from Controller)
3
TXD—Transmitted Data (to Controller)
4
No Connection
5
Ground and Signal Return
6
No connection
7
RTS—Request to Send (Amplifier)
8
CTS—Clear to Send (Amplifier)
9
No Connection
Table 7, Pinouts for the COM2 Intereface
Pin No.
RS-485 2-Wire System
RS-485 4-Wire System
1
(-) Data
(-) Transmit Data
2
(-) Data
(-) Receive Data
3
No Connection
No Connection
4
No Connection
No Connection
5
Ground
Ground
6
(+) Data
(+) Transmit Data
7
(+) Data
(+) Receive data
8
No Connection
No Connection
9
No Connection
No Connection
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