Mitsubishi Electronics MAM-AM20 ユーザーズマニュアル
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).
(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)
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.
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.
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.
The assignment of the COM2 (plug) is
the same as that of a COM port on the
PC.