Endress+Hauser Micropilot FMR62 - Cable Entries; Cable Specification; Overvoltage Protection

Micropilot FMR62
24 Endress+Hauser
Cable entries Connection of the power supply and signal cables
To be selected in feature 050 "Electrical connection":
• Coupling M20, material depends on approval:
• For non-Ex, ATEX, IECEx, NEPSI Ex ia/ic:
Plastic M20x1.5 for cable ⌀5 to 10 mm (0.2 to 0.39 in)
• For Dust-Ex, FM IS, CSA IS, CSA GP, Ex ec:
Metal M20x1.5 for cable ⌀7 to 10 mm (0.28 to 0.39 in)
Here, the material of the coupling depends on the housing type; GT18 (stainless steel housing):
316L (1.4404); GT19 (plastic housing) and GT20 (aluminum housing): brass (CuZn).
• For Ex db:
No cable gland available
• Thread
• ½" NPT
• G ½"
• M20 × 1.5
• M12 plug / 7/8" plug
Only available for non-Ex, Ex ic, Ex ia
Connection of remote display FHX50
Feature 030 "Display, operation" Cable entry for connection of FHX50
L: "Prepared for display FHX50 + M12 connection" M12 socket
M: "Prepared for display FHX50 + custom connection" M12 cable gland
Cable specification
• Devices without integrated overvoltage protection
Pluggable spring-force terminals for wire cross-sections 0.5 to 2.5 mm
2
(20 to 14 AWG)
• Devices with integrated overvoltage protection
Screw terminals for wire cross-sections 0.2 to 2.5 mm
2
(24 to 14 AWG)
• For ambient temperature T
U
≥60 °C (140 °F): use cable for temperature T
U
+20 K.
HART
• A normal device cable suffices if only the analog signal is used.
• A shielded cable is recommended if using the HART protocol. Observe grounding concept of the
plant.
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 μs), an overvoltage protection module has to be
installed.
Integrated overvoltage protection module
An integrated overvoltage protection module is available for 2-wire HART devices.
Product structure: Feature 610 "Accessory mounted", option NA "Overvoltage protection".
Technical data
Resistance per channel 2 × 0.5 Ω max.
Threshold DC voltage 400 to 700 V
Threshold impulse voltage < 800 V
Capacitance at 1 MHz < 1.5 pF
Nominal arrest impulse voltage (8/20 μs) 10 kA
External overvoltage protection module
HAW562 or HAW569 from Endress+Hauser are suited as external overvoltage protection.