Deltabar PMD78B HART Electrical connection
Endress+Hauser 11
5.2.3 Closing the housing covers
NOTICE
Thread and housing cover damaged from dirt and fouling!
‣
Remove dirt (e.g. sand.) on the thread of the cover and housing.
‣
If you continue to encounter resistance when closing the cover, check the thread again for
fouling.
Housing thread
The threads of the electronics and connection compartment can be coated with an anti-
friction coating.
The following applies for all housing materials:
Do not lubricate the housing threads.
6 Electrical connection
6.1 Connecting requirements
6.1.1 Potential equalization
The protective ground on the device must not be connected. If necessary, the potential
matching line can be connected to the outer ground terminal of the device before the device is
connected.
A0045412
1 Ground terminal for connecting the potential matching line
L
WARNING
Explosion Hazard!
‣
Please refer to the separate documentation on applications in hazardous areas for the
safety instructions.
For optimum electromagnetic compatibility:
• Keep the potential matching line as short as possible
• Maintain a cross-section of at least 2.5 mm
2
(14 AWG)
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