Siemens SIMATIC NET SINAUT ST7 System Manual page 257

Station control system
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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 6-21
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
Two MD2s as 2-wire repeater with simultaneous 2-wire tapping of a TIM 32 or TIM 42
Installing and putting a SINAUT modem into operation
6.4 MD2 dedicated line modem
257

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