Connecting The Device; Opening Cover - Endress+Hauser Levelflex FMP56 Operating Instructions Manual

Electrical connection
44
Integrated overvoltage protection module
An integrated overvoltage protection module is available for the HART 2-wire devices as
well as for PROFIBUS PA and FOUNDATION Fieldbus.
Product structure: Feature 610 "Accessory mounted", option NA "Overvoltage protection".
Resistance per channel Maximum 2 × 0.5 Ω
DC sparkover voltage 400 to 700 V
Trip surge voltage < 800 V
Capacity at 1 MHz < 1.5 pF
Nominal discharge 10 kA
current (8/20 µs)
External overvoltage protection module
The HAW562 or HAW569 for example from Endress+Hauser are suitable options for
external overvoltage protection.
More information is provided in the following documents:
• HAW562: TI01012K
• HAW569: TI01013K
7.2

Connecting the device

WARNING
L
Explosion hazard!
‣
Comply with applicable national standards.
‣
Comply with the specifications in the Safety Instructions (XA).
‣
Use specified cable glands only.
‣
Check to ensure that the power supply matches the information on the nameplate.
‣
Switch off the power supply before connecting the device.
‣
Connect the potential matching line to the outer ground terminal before applying the
power supply.
Required tools/accessories:
• For devices with a cover lock: Allen key AF3
• Wire stripper
• When using stranded cables: One ferrule for every wire to be connected.
7.2.1

Opening cover

1.
1. Loosen the screw of the securing clamp of the connection compartment cover using
an Allen key (3 mm) and turn the clamp 90 ° counterclockwise.
2. Unscrew the connection compartment cover and check the cover seal; replace it if
necessary.
3 mm
Levelflex FMP56, FMP57 HART
2.
Endress+Hauser
A0021490