Siemens SITRANS F Series Operating Instructions Manual page 40
Electromagnetic flowmeters
Hide thumbs
Also See for SITRANS F Series:
- Operating instructions manual (362 pages) ,
- Quick start manual (220 pages) ,
- Manual (188 pages)
Table of Contents
Advertisement
Connecting
5.5 Communication modules
RS 485 connection diagram
①
②
③
①
②
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.
40
Common
Connect shield to encapsulation
Shield must be connected to protective ground
Common
Termination
SITRANS FM MAG 8000
Operating Instructions, 03/2020, A5E03071515-AH
- Quick Links:
- Sensor Installation
Hide quick links:
Advertisement
Table of Contents
