Siemens SINAUT ST7 - 2.4 Mounting

Mounting and Installation
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
2-37
2.4 Mounting
Introduction
The modem can be mounted on a SIMATIC S7-300 mounting rail or on a standard
35 mm mounting rail using a 6NH7760-0AA adapter (to be ordered separately).
You can mount and operate the modem horizontally or vertically.
!
Important
Before the modem is mounted on the S7-300 or standard mounting rail, all of the
DIL switches on the modem should be set to the positions required for operation.
These switches are usually not easy to access when mounted.
2.4.1 Mounting on an S7-300 Mounting Rail
!
Important
If the MD2 is mounted together with other S7-300 modules, note the fact that this
modem does not have an S7-300 backplane bus. For this reason an S7-300 SM,
FM or CP module that communicates with the S7-CPU via this backplane bus
may not be placed to the right of the modem!
Procedural Steps for Installation
To mount the modem on a S7-300 mounting rail, carry out the steps in the order
listed below:
1. Switch off the power supply to which the modem is to be connected.
2. Hang the modem on the mounting rail and swing it down.
3. Screw the modem tight.
4. Connect the modem to the power supply (see also 2.4.4).
5. Insert the supplied cable for the modem into the X3 RJ12 Western socket
located above the power supply socket on the modem (see Fig. 2-2 and Fig. 2-
6). The release clip of the RJ12 Western plug must be on the right side when
inserted.
Note
When inserting the cable it is best to hold it directly below the RJ12 plug. The
insertion is then considerably easier than when holding the cable by the RJ12
plug. Make sure that the RJ12 plug clearly clicks when it is inserted!