Wiring
Loop-powered display unit
22
5.4
Inserting the cable, field housing
TX20
2.
3.
4.
1.
A0017830
7
Inserting the cable, field housing
Inserting the cable, field housing, connection without transmitter power supply
(example)
1. Release the housing screws
2. Open the housing
3. Open the cable gland (M16) and insert the cable.
4. Connect the cable incl. functional grounding and close the cable gland
5.5
Shielding and grounding
Optimum electromagnetic compatibility (EMC) can only be guaranteed if the system
components and, in particular, the lines are shielded and the shield forms as complete
a cover as possible.
HART
®
communication allows three different types of shielding:
• Shielding at both ends
• Shielding at one end on the feed side with capacitance termination at the field device
• Shielding at one end on the feed side
