Siemens SIMATIC NET SINAUT ST7 System Manual page 253

Station control system
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Figure 6-17
Note
Any TIM with an RS-232 port can be used, in other words, the TIM 3V-IE variants, the
TIM 4R-IE and all TIM 4 types.
Connecting several MD2s with a TIM over the RS-485 port
Several MD2 modems can be connected to a TIM over the RS-485 port. This type of
configuration is necessary when several dedicated lines come together on one TIM; in other
words when connecting a star network. The following figure shows this configuration with
standard components.
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
Connecting an MD2 to a TIM over RS-232, 4-wire tapping point variant
Installing and putting a SINAUT modem into operation
6.4 MD2 dedicated line modem
253

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