MITSUBISHI ELECTRIC MITSUBISHI MAM MAM-AM24 - Manual (Page 21)

4 Interfaces
The serial interfaces COM1 und COM2 are to connect a PC, a PLC or other devices.
NOTE The type and number of interfaces available depend on the type of modem being used.
(see section 2.6 and 10.6).
4.1 COM1 – RS232 (Jack)
The RS232 interface COM1 (9-pole D-Sub socket) is provided on all Mitsubishi Alarm Modem
models. It is primarily used as a programming interface for connecting a PC. A standard 1:1
serial cable can be used for this (not supplied)
.
4.2 COM2 – RS232 (Plug)
NOTE As most PLCs require the use of a special serial programming cable, the programming cable
of Mitsubishi concerned should be used in all cases.
Interfaces COM1 – RS232 (Jack)
Mitsubishi Alarm Modem 4 - 1
1 DCD
RTS 7
DSR 6
CTS 8
RI 9
2 RXD
3 TXD
4 DTR
5 GND
COM1
Fig. 4-1:
The COM1 port has the same assign-
ment as a standard modem with an
RS232 socket.
5 GND
CTS 8
RI 9
RTS 7
DSR 6
4 DTR
3 TXD
2 RXD
1 DCD
COM2
Fig. 4-2:
The assignment of the COM2 (plug) is
the same as that of a COM port on the
PC.