Siemens SINAUT ST7 System Manual page 112

Installation guide
3.5 Installing the TIM 4R-IE in an S7-300
NOTICE
Since the SINAUT-Modems MD2, MD3 and MD4 do not have an S7-300 backplane bus, an
S7-300 SM, FM or CP module that communicates with the CPU over this backplane bus
must not be inserted to the right of the modem!
Note
In all of the sample configurations of the S7-300, it is assumed that a 24 V power supply is
available for the CPU, the TIMs and the other modules.
The maximum number of TIM modules that can be inserted in an S7-300 station depends on
the connection resources made available by the CPU.
S7-300 with one TIM 4R-IE
With an S7-300 and one TIM 4R-IE, it is possible to set up an extremely efficient node
station. The following figure shows an example in which the master station is connected over
one of the two Ethernet interfaces of the TIM. The connections to the subsidiary stations are
established over the other three interfaces: here, over two classic WANs using suitable MDx
SINAUT modems and over an IP-based WAN, in this case an FO cable connected via a
SCALANCE X switch.
In these configurations, the master station and stations can exchange data among
themselves over the TIM 4R-IE as well as with the CPU of the node station. The TIM 4R-IE
also supports direct communication between stations in the three underlying networks, in
other words both within a network and from one network to another.
Figure 3-8
Instead of the MDx SINAUT modem, other modems with an RS-232 or RS-485 interface can
also be used, for example wireless devices or the SINAUT GSM modem MD720-3.
The following figure shows a different node station variant in which the TIM 4R-IE has a
redundant connection both to the master station and to the subsidiary stations. A variant of
this configuration would be to have a redundant connection only to the master station and to
have single transmission paths to the stations. Which two interfaces are redundant can be
freely selected by the user.
112
SIMATIC S7-300 with TIM 4R-IE, 2 connections to WAN, 2 connections to Ethernet,
one Ethernet interface connected over SCALANCE X-200 by FO cable
System Manual, 07/2009, C79000-G8976-C178-07
Station control system