Endress+Hauser Proline 100 Modbus RS485 Brief Operating Instructions page 15

Proline 100 Modbus RS485
2
3
4
A0016809
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.
2
1
5
4
A0016811
5.1.5 Shielding and grounding
Modbus
The shielding and grounding concept requires compliance with the following:
• Electromagnetic compatibility (EMC)
• Explosion protection
• Personal protection equipment
• National installation regulations and guidelines
• Observe cable specification .
• Keep the stripped and twisted lengths of cable shield to the ground terminal as short as
possible.
• Seamless cable shielding.
Grounding of the cable shield
To comply with EMC requirements:
• Ensure the cable shield is grounded to the potential matching line at multiple points.
• Connect every local ground terminal to the potential matching line.
Endress+Hauser
Pin
1 L+
2
3
1
4 L-
5
5
Coding
A
Pin
1
2 A
3
3
4 B
5
Coding
B
Assignment
DC 24 V
Not assigned
Not assigned
DC 24 V
Grounding/shielding
Plug/socket
Plug
Assignment
Not assigned
Modbus RS485
Not assigned
Modbus RS485
Grounding/shielding
Plug/socket
Socket
Electrical connection
15