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Interfaces
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)
.
COM1
4.2
COM2 – RS232 (Plug)
COM2
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.
Mitsubishi Alarm Modem
RI 9
CTS 8
RTS 7
DSR 6
DSR 6
RTS 7
CTS 8
RI 9
Fig. 4-1:
The COM1 port has the same assign-
5 GND
ment as a standard modem with an
RS232 socket.
4 DTR
3 TXD
2 RXD
1 DCD
Fig. 4-2:
The assignment of the COM2 (plug) is
1 DCD
the same as that of a COM port on the
2 RXD
PC.
3 TXD
4 DTR
5 GND
COM1 – RS232 (Jack)
4 - 1
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