Siemens SINAUT ST7 - Pin Assignments on the RJ12 Western Socket

Mounting and Installation
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
2-19
Table 2-14 Default settings for terminating resistors at the WAN end
Type of
Connection
Baud rate Setting on
DIL Switch
Note
1200 bps
2400 bps
1234
OFF
ON
The MD2 is located at the beginning or end of a 2-wire or 4-
wire line and is set to a transmission speed of 1200 or 2400
bps
(see also Table 2-10).
Terminal Point
2-wire
(channel 1),
2 x 2-wire
(channel 1+2),
4-wire
9600 bps
19200 bps
1234
OFF
ON
Terminal point as above but with transmission speed set to
9600 or 19200 bps
(see also Table 2-10).
1200 bps
2400 bps
1234
OFF
ON
The MD2 is not located at the beginning or end of a 2-wire
line; it taps into this 2-wire line somewhere along the way
with high resistance. The transmission speed is set to 1200
or 2400 bps (see also Table 2-10).
Tapping Point
2-wire
(channel 1)
9600 bps
19200 bps
1234
OFF
ON
Tapping point as above but with transmission speed set to
9600 or 19200 bps (see also Table 2-10).
Tapping Point
4-wire
1200 bps
2400 bps
9600 bps
19200 bps
1234
OFF
ON
The MD2 is not located at the beginning or end of a 4-wire
line; it taps into this 4-wire line somewhere along the way
with high resistance.
2.1.11 Pin Assignments on the RJ12 Western Socket
The X3 connector on the MD2 modem is a 6-pin RJ12 Western connector (socket).
The following table lists the pin assignments.
Table 2-15 Pin assignments on the X3 RJ12 Western socket for the MD2 modem
Diagram Pin no. Signal
Name
Signal
Direction
Comments
5a1
2b1
Input or bi-
directional
(channel 1)
With 2-wire: Input and output channel 1
With 4-wire: Input
4a2
3b2
Output or bi-
directional
(channel 2)
With 2-wire: Input and output channel 2
With 4-wire: Output
1
a
RTS
6
b
RTS
Output Output optical relay
The RTS signal can be output via the floating optical relay on pins 1 and 6 of the
RJ12 connector.
The following is the technical data for this output:
· max. connection voltage = 60V AC/DC
· R
ON
max = 3 Ohm
· I max = 400 mA
A suppression circuit is not provided for the output.
6
5
4
3
2
1