Siemens SINAUT ST7 System Manual page 207

Pinout of the RJ-12 Western jack
The X3 connector is designed as a 6-pin RJ-12 Western jack. The pinout is shown in the
following table.
Table 5- 16 Pinout of the X3 RJ-12 Western jack for the MD2 modem
Illustration
6
5
4
3
2
1
The RTS signal can be output over the floating optical relay at pins 1 and 6 of the RJ-12
connector.
The technical specifications of this output are as follows:
● max. connected voltage = 60 V AC/DC
● R
● I
A suppressor circuit does not exist for the output.
Standard connecting cable for the RJ-12 port
The connecting cable 6NH7700-2AR60 ships with every MD2 modem. This allows the MD2
modem to be connected to an LTOP overvoltage protection module. The actual connection
of the dedicated cable is on the LTOP overvoltage protection module using screw terminals.
The connecting cable can also be ordered as a spare under the number shown.
Table 5- 17 Standard connecting cable for the MD2 modem
Order no. Description
6NH7700-2AR60 Connecting cable with 2 x RJ-12 Western plugs for
connection of an MD2 modem (RJ-12) to an LTOP
overvoltage protection module (RJ-12).
Cable length 6 m
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
Pin no. Signal name
5 a1
2 b1
4 a2
3 b2
1 a
RTS
6 b
RTS
max = 3 ohms
ON
= 400 mA
max
Installing and putting a SINAUT modem into operation
Signal direction
Input or bidirectional (channel 1)
Output or bidirectional (channel 2)
Output
5.5 MD2 dedicated line modem
Remark
With 2-wire: Input and output
channel 1
With 4-wire: Input
With 2-wire: Input and output
channel 2
With 4-wire: Output
Output optical relay
Illustration
207