Endress+Hauser Proline Promass F 100 - Shielding and Grounding

Proline Promass F 100 Modbus RS485 Electrical connection
33
5 Grounding/shielding
Coding Plug/socket
A Plug
Signal transmission
Promass
Device plug for signal transmission (device side), MODBUS RS485 (not intrinsically safe)
For use in the non-hazardous area and Zone 2/Div. 2.
3
2
4
1
5
A0016811
Pin Assignment
1 Not assigned
2 A Modbus RS485
3 Not assigned
4 B Modbus RS485
5 Grounding/shielding
Coding Plug/socket
B Socket
7.1.5 Shielding and grounding
Shielding and grounding concept
1. Maintain electromagnetic compatibility (EMC).
2. Take explosion protection into consideration.
3. Pay attention to the protection of persons.
4. Comply with national installation regulations and guidelines.
5. Observe cable specifications .
6. Keep the stripped and twisted lengths of cable shield to the ground terminal as short
as possible.
7. Shield cables fully.
Grounding of the cable shield
NOTICE
In systems without potential matching, the multiple grounding of the cable shield
causes mains frequency equalizing currents!
Damage to the bus cable shield.
‣
Only ground the bus cable shield to either the local ground or the protective ground at
one end.
‣
Insulate the shield that is not connected.
To comply with EMC requirements:
1. Ensure the cable shield is grounded to the potential matching line at multiple points.
2. Connect every local ground terminal to the potential matching line.