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D400 Substation Data Manager User's Manual 59
4.8 Modem Connections
A COM2 port is provided on the COM2 Port Adapter or the Redundant TP Ethernet + COM2
Port Adapter. The COM2 port can support serial connections for the following dial-up
interfaces:
• External modem
• Point-to-point protocol (PPP) services
• Wide area network
The COM2 port provides a single DB-9 connector wired for an RS-232 DCE signal. The
COM2 Port Adapter plugs into any NET slot (slots 11 and 12) of the D400. The Redundant
TP Ethernet + COM2 Port Adapter plugs into the NET1 slot (slot 11).
Note: The COM2 Port requires an external modem to provide dial-up functionality.
See section “3.11 COM2 Port Adapter” for more information.
» To connect a modem to the COM2 Port Adapter, use a straight-through
modem cable (not supplied with the D400):
1
13
14
25
1
5
6
9
2
3
20
7
22
4
5
6
Modem