Mitsubishi Electronics MAM-AM20, MAM-AM6 Interfaces, COM1 - RS232 Jack, 4.2 COM2 - RS232 Plug

InterfacesCOM1 – RS232 (Jack)

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)

.

	RI 9	5 GND
		4 DTR
	CTS 8
COM1		3 TXD
	RTS 7
	DSR 6	2 RXD
		1 DCD

Fig. 4-1:

The COM1 port has the same assign- ment as a standard modem with an RS232 socket.

4.2COM2 – RS232 (Plug)

	DSR 6	1 DCD
		2 RXD
	RTS 7
COM2		3 TXD
	CTS 8
	RI 9	4 DTR
		5 GND

Fig. 4-2:

The assignment of the COM2 (plug) is the same as that of a COM port on the PC.

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 4 - 1