Endress+Hauser Micropilot FMR60B Brief Operating Instructions page 16

Electrical connection
 2 Cover with securing screw; hygienic housing (only for dust explosion protection)
12.1.2 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 housing before the device
is connected.
A
1 1
A Single compartment housing, plastic
B Single compartment housing, aluminum, coated
C Single compartment housing, 316L, hygiene (Ex device)
D Dual compartment housing, aluminum, coated
E Dual compartment housing, L-shaped, aluminum, coated
1 Ground terminal for connecting the potential matching line
WARNING
L
Ignitable sparks or impermissible high surface temperatures.
Explosion hazard!
‣
Please refer to the separate documentation on applications in hazardous areas for the
safety instructions.
For optimum electromagnetic compatibility:
• Keep potential matching line as short as possible
• Observe minimum cross-section of 2.5 mm
16
B C
1
4
7 x 0.7 Nm
D
1
2 (14 AWG)
Micropilot FMR60B HART
A0050983
E
1
A0046583
Endress+Hauser