SSD Drives DIGIVEX Motion PVD 3554, Руководство пользователя и по вводу в эксплуатацию

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DIGIVEX Motion - PROFIBUS
22
PVD 3554 GB 01/2004
Each bus segment must have a resistor network i.e. a bus terminal at both ends.
The terminal can be switched on and off if the recommended connectors have been used for the
connections.
Terminal resistor
switched ON
ON
Terminal resistor switched
OFF
OFF
Position of the switch for activating and deactivating the terminal resistor
Users must ensure that a resistor terminal network is installed on the first and last subscriber as
specified in the diagram below if these bus connectors are not used.
Data lines
Data lines
VP (PIN6)
390 ohms
390 ohms
220 ohms
RxD/TxD-P (PIN 3)
RxD/TxD-N (PIN 8)
DGND (PIN 5)
Resistor terminal network
A bus segment must always be terminated at both ends by a terminal resistor. This
condition is not fulfilled, for example, if the last slave with bus connector is switched off.
The resistor is inoperative if the bus connector voltage is supplied by the station.
Please make sure that all stations comprising an active terminal resistor are supplied
with power at all times.
The bus connector with looped-though bus cable can be disconnected from a drive PROFIBUS-
DP interface without interrupting the data transmission on the bus.
3.1.4 Cable connecting diagram