Siemens SINAUT ST7 - View of the MD2 Modem from below

Mounting and Installation
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
2-17
2.1.8 View of the MD2 Modem from Below
The following illustration shows the MD2 modem from below with the X3 RJ12
Western socket, the DIL switch for activating the RS232 or RS485 interface as well
as the DIL switch for activating the terminating resistors at the WAN end.
Fig. 2-6 View of the MD2 modem from below
1234
1234
6-pin X3 RJ12 Western socket:
WAN connection for MD2 modem. The
standard cable is supplied with the MD2
(see Table 2-16).
Front door with 'Modem' inscription
The 4-pin DIL switch is used to activate
either the RS232 or RS485 interface.
See also Fig. 2-7. The default settings
for RS232 or RS485 are as follows:
1234
OFF
ON
RS232 port active
(factory setting)
1234
OFF
ON
RS485 port active,
terminating resistor not
active. Needs to be set on
last plug! See Fig. 2-13
4-pin DIL switch for activating
terminating resistors on the WAN
side. See also Fig. 2-8 and Table
2-14.