Installing and putting a SINAUT modem into operation
6.4 MD2 dedicated line modem
SINAUT ST7 Station control system - System Manual
250
System Manual, 05/2007, C79000-G8976-C178-06
Table 6-17 Pinout of the X3 RJ-12 Western jack for the MD2 modem
Illustration
Pin no.
Signal name Signal direction
Remark
5
a1
2
b1
Input or bidirectional (channel 1)
With 2-wire: Input and output
channel 1
With 4-wire: Input
4
a2
3
b2
Output or bidirectional (channel 2)
With 2-wire: Input and output
channel 2
With 4-wire: Output
1
a
RTS
6
5
4
3
2
1
6
b
RTS
Output
Output optical relay
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
ON
max = 3 ohms
● I
max
= 400 mA
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 6-18 Standard connecting cable for the MD2 modem
Order no.
Description
Illustration
6NH7700-2AR60
Connecting cable with 2 x RJ-12 Western plugs for
connection to the MD2 modem (RJ-12) with an LTOP
overvoltage protection module (RJ-12). The cable is also
suitable for an MD2 integrated in a TIM.
Cable length 6 m
5-
5-
The pinout of the two RJ-12 plugs is identical.
Note
It is best to hold the cable just below the RJ-12 plug. This makes it easier to insert the plug
than if you hold the RJ-12 plug itself. When inserting it, make sure that you can hear the RJ-
12 connector click into place!
