Siemens SIMATIC NET TeleControl SINAUT ST7, Системное руководство

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Installation and commissioning of the modems and routers
5.5 MD2 dedicated line modem
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
169
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 cable is no longer available as separate spare part.
Table 5- 17 Standard connecting cable for the MD2 modem
Order no. Description Illustration
6NH7700-2AR60 Connecting cable with 2 x RJ-12 Western plugs for connec-
tion of an MD2 modem (RJ-12) to an LTOP overvoltage
protection module (RJ-12).
Cable length 6 m
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!
5.5.4 Connecting the MD2 with TIM, LTOP and dedicated line
Introduction
The following figures illustrate the various options for connecting the MD2 modem to a TIM
or other MD2 modems as well as to a dedicated line over an LTOP.
For more detailed information on connecting, wiring up and setting the LTOP, refer to the
section
Line transformer with LTOP overvoltage protection
.