Siemens SINAUT ST7 - Front View of an MD2 with Removed Front Doors

Mounting and Installation
6NH7811-0AA22 © Siemens AG 2002 All Rights Reserved
2-4 MD2 Modem (07/2002)
2.1.3 Front View of an MD2 with Removed Front Doors
The following illustration shows a front view of the MD2 modem with the doors
removed so that the connectors inside are visible.
Fig. 2-2 Front view of the MD2 modem with removed front doors
X1
X2
TXD 1
RXD 2
DTR 3
RTS/ONL 4
CTS/RI 5
DCD 6
X3
M
L+
M
DC
24V
9-pin X1 connector:
RS232 port for connecting the
terminal or for connecting to an other
MD2 modem to form a repeater.
The RS232 port is activated with a 4-
pin DIL switch. This can be accessed
from below through the housing grill.
See Fig. 2-6.
Pin Assignment: Table 2-2.
Standard Cables: Table 2-4.
9-pin X2 socket:
RS485 port for connecting the
terminal or installing other MD2
modems in parallel.
The RS485 port is activated with a 4-
pin DIL switch. This can be accessed
from below through the housing grill.
See Fig. 2-6.
Pin Assignment: Table 2-3.
Standard Cables: Table 2-4.
Connection for DC 24 V
power supply
A
ccess (from below) to the X3 WAN
connection socket of the modem (6-pin
RJ12 Western socket)