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RS 485 connection diagram
①
Common
②
Connect shield to encapsulation
③
Shield must be connected to protective ground
①
Common
②
Termination
A Modbus RS 485 must use a balanced pair (for D+ - D−) and a third wire (for common).
For the balanced pair used in an RS 485 system, a characteristic impedance with a value
between 100 and 120 ohms must be used.
Shield must always be connected to MAG 8000 encapsulation using cable clamp as shown in
figure in section cable installation, see Power supply (Page 36).
Bus termination:
All RS 485-based networks must be terminated correctly to function properly. A termination
must be placed at each end of segment.
The Modbus RTU module can add a 120 ohm termination if a jumper is placed beside terminals
in position "ON".
Termination is set to "ON" from factory.
Connecting
5.5 Communication modules
SITRANS FM MAG 8000
40
Operating Instructions, 03/2020, A5E03071515-AH
Содержание 7ME6810
Страница 10: ...Introduction 1 7 Notes on warranty SITRANS FM MAG 8000 10 Operating Instructions 03 2020 A5E03071515 AH ...
Страница 16: ...Description 3 4 Benefits SITRANS FM MAG 8000 16 Operating Instructions 03 2020 A5E03071515 AH ...
Страница 76: ...Operating 7 6 Battery powered operation SITRANS FM MAG 8000 76 Operating Instructions 03 2020 A5E03071515 AH ...
Страница 86: ...Service and maintenance 8 9 Disposal SITRANS FM MAG 8000 86 Operating Instructions 03 2020 A5E03071515 AH ...
Страница 140: ...Unit conversion table SITRANS FM MAG 8000 140 Operating Instructions 03 2020 A5E03071515 AH ...
Страница 168: ...Features SITRANS FM MAG 8000 168 Operating Instructions 03 2020 A5E03071515 AH ...