Overvoltage Protection; Connection Data; Profibus Pa - Endress+Hauser Levelflex FMP51 Operating Instructions Manual

Levelflex FMP51, FMP52, FMP54
Endress+Hauser
7.2.3

Overvoltage protection

If the measuring device is used for level measurement in flammable liquids which requires the use
of overvoltage protection according to DIN EN 60079-14, standard for test procedures 60060-1
(10 kA, pulse 8/20 ms), overvoltage protection has to be ensured by an integrated or external
overvoltage protection module.
Integrated overvoltage protection
An integrated overvoltage protection module is available for 2-wire HART as well as PROFIBUS
PA and FOUNDATION Fieldbus devices.
Product structure: Feature 610 "Accessory mounted", option NA "Overvoltage protection".
Resistance per channel
Threshold DC voltage
Threshold impulse voltage
Capacitance at 1 MHz
Nominal arrest impulse voltage (8/20 ms)
External overvoltage protection
HAW562 or HAW569 from Endress+Hauser are suited as external overvoltage protection.
For detailed information please refer to the following documents:
• HAW562: TI01012K
• HAW569: TI01013K
7.3

Connection data

7.3.1

PROFIBUS PA

1)
"Power supply; Output"
G: 2-wire; PROFIBUS PA, switch output
1) Feature 020 of the product structure
Technical data
Terminal voltage
9 to 32 V
DC
Electrical connection
2 * 0.5 W max
400 to 700 V
< 800 V
< 1.5 pF
10 kA
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