Micropilot FMR67
Hauser
V. 1, Rev. 3, 11-04-2017
21
Cable entries
Connection of power supply and signal line
To be selected in feature 050 "Electrical connection"
• Gland M20; Material dependent on the approval:
– For Non-Ex, ATEX, IECEx, NEPSI Ex ia/ic:
Plastics M20x1.5 for cable ⌀5 to 10 mm (0.2 to 0.39 in)
– For Dust-Ex, FM IS, CSA IS, CSA GP, Ex nA:
Metal M20x1.5 for cable ⌀7 to 10 mm (0.28 to 0.39 in)
– For Ex d:
No gland available
• Thread
– ½" NPT
– G ½"
– M20 × 1.5
• Plug M12 / Plug 7/8"
Only available for Non-Ex, Ex ic, Ex ia
Connection of remote display FHX50
Dependent on feature 030: "Display, Operation":
• "Prepared for display FHX50 + M12 connection":
M12 socket
• "Prepared for display FHX50 + custom connection":
M16 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.
• For 4-wire devices: Standard device cable is sufficient for the power line.
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), 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".
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
1)
The material of the gland is dependent on the housing type; GT18 (stainless steel housing): 316L (1.4404); GT19 (plastic housing) and GT20
(aluminum housing): nickel-coated brass (CuZn).
