Siemens SIMATIC NET TeleControl SINAUT ST7 System Manual page 176

Industrial remote communication, station control system
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Installation and commissioning of the modems and routers
5.5 MD2 dedicated line modem
Connecting two MD2s to form a repeater
Two MD2 modems can be connected to form a repeater when the distances to be covered
are too great (2-wire or 4-wire repeater). The repeater amplifies the signal and regenerates
the individual characters. For more detailed information on calculating the distances that can
be covered depending on the baud rate and number of tapped stations, refer to the following
table.
Figure 5-21
176
Two MD2s as 2-wire repeater with simultaneous 2-wire tapping of a TIM (for example
TIM 3V-IE)
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10

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