Installing and putting a SINAUT modem into operation
5.9 Installing and putting a SINAUT MD2, MD3, MD4 modem into operation
Station control system
270 System Manual, 07/2009, C79000-G8976-C178-07
5.9 Installing and putting a SINAUT MD2, MD3, MD4 modem into
operation
5.9.1 Installation
Introduction
The MD2, MD3 and MD4 modems can be installed on a SIMATIC S7-300 rail or using the
6NH7760-0AA adapter (must be ordered separately) on a 35 mm standard rail.
The modem can be operated both in a horizontal and in a vertical installation.
Note
Before the modem is installed on the S7-300 or standard rail, all the DIL switches of the
modem must be set correctly for operation. These switches are practically inaccessible when
the module is installed.
5.9.2 Installation on an S7-300 rail
Note
If you want to install the modem along with other S7-300 modules, remember that the
modem does not have an S7-300 backplane bus. There must therefore be no S7-300
module that communicates with the S7 CPU over the backplane bus (SM, FM or CP)
installed to the right of the modem.
Order of installation
To install the modem on an S7-300 rail, follow the steps below in the order shown:
1. Turn off the power supply to which the modem will be connected.
2. Place the modem on the rail and push it in towards the bottom.
3. Screw the modem tight.
4. Connect the modem to the power supply.
5. Insert the cable supplied with a modem into the X3 RJ-12 Western jack. This is located
above the power supply connector of the modem. The catch of the RJ-12 plug must be
on the right hand side when it is inserted.
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!
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