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Installation guide
3.8 Standalone TIM 4 with an S7-400 or PC
Figure 3-23
In much the same way as with an S7-400, ST7cc / ST7sc can also have two connections to
a WAN. The following figure shows the configuration.
Figure 3-24
Other modems with an RS-232 or RS-485 interface can be used instead of the SINAUT MDx
modems, for example wireless devices or the SINAUT GSM modem MD720-3. The RS-485
port of the TIM 4 also allows a star-shaped dedicated line network to be connected using
several MD2 or MD3 SINAUT modems. You will find more information on this topic in the
section "Installation and commissioning of a SINAUT modem":
Apart from the SINAUT ST7cc or ST7sc control center system, a local controller, for example
an S7-400 can also be connected to MPI and exchange data with the stations in the
telecontrol network. This controller could, for example, be used to display data received from
the stations on a panel or console or for emergency input by an operator if ST7cc / ST7sc
failed. The controller could also handle central control tasks such as starting up the system.
144
SINAUT ST7cc / ST7sc control center systems with TIM 4 on MPI bus,
1 connection to WAN over integrated modem
SINAUT ST7cc / ST7sc control center system with TIM 4 on MPI bus,
1 connection to WAN (1) over integrated modem,
1 connection to WAN (2) over external MDx modem
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
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