Endress+Hauser 11362Z, Инструкции по безопасности

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XA00197F-B Conductive Limit Detection
14
Overvoltage protection
XA00197F_02
å 2
A Zone 1 or Zone 2
B Zone 0
1 Tank
2 Probe
3 Electronic insert
4 e.g. metal hose, metal pipe
5 Overvoltage protection, e.g. HAW562
6 Grounding via top-hat rail or 51003750 metallic protective housing
7 Cable with screening or metal sheath
8 Certified associated apparatus
9 Potential equalization line

4 mm² Cu
10 Insulator (optional)
11 Potential equalization
12 Cathodic protection (Object voltage)
• If an overvoltage protection against atmospheric over voltages is required: no other circuits may
leave the housing during normal operation without additional measures.
• For installations which require overvoltage protection to comply with national regulations or
standards, install the device using overvoltage protection (e.g. HAW56x from Hauser).
• Observe the safety instructions of the overvoltage protection.
1
1
2
2
–
+
1000 mm £
1
2
3
4
9
8
11
10
6 7 5
A
B
12
Object voltage at tank Required version of intrinsically safe circuits
≤ 2 V Screening
≥ 2 V ≤ 24 V Screening