Safety Instructions: Zone; Temperature Tables; Connection Data - Endress+Hauser Micropilot FMR50 Sicherheitshandbuch

Micropilot
Safety instructions:
Zone 0

Temperature tables

Connection data

• After aligning (rotating) the housing, retighten the fixing screw (see Operating Instructions).
• When mounting the device:
– Exclude any mechanical damage or friction during the application.
– Pay particular attention to flow conditions and tank fittings.
• Continuous service temperature of the connecting cable: –40 to  +85 °C; in accordance with the
range of service temperature taking into account additional influences of the process conditions
(T and T +20 K).
a,min a,max
• Only use certified cable entries suitable for the application.
Observe selection criteria as per IEC/EN 60079-14. Accordingly, the connection terminal does not
include any ignition sources.
• When operating the transmitter housing at an ambient temperature under -20 °C, use appropriate
cables and cable entries permitted for this application.
• When connecting through a conduit entry approved for this purpose, mount the associated sealing
unit directly at the housing.
• Seal unused entry glands with approved sealing plugs that correspond to the type of protection.
The plastic transport sealing plug does not meet this requirement and must therefore be replaced
during installation.
• Before operation:
– Screw in the cover all the way.
– Tighten the securing clamp on the cover.
• In potentially explosive atmospheres:
– Do not open the electrical connection of the power supply circuit when energized.
– Do not open the connection compartment cover.
Intrinsic safety
• The device can be connected to the Endress+Hauser FXA291 service tool: refer to the Operating
Instructions.
Potential equalization
• Integrate the device into the local potential equalization.
• In the event of potentially explosive vapor/air mixtures, only operate the device under atmospheric
conditions.
– Temperature: –20 to +60 °C
– Pressure: 80 to 110 kPA (0.8 to 1.1 bar)
– Air with normal oxygen content, usually 21 % (V/V)
If no potentially explosive mixtures are present, or if additional protective measures have been taken
according to EN 1127-1, the device may also be operated under non-atmospheric conditions in
accordance with the manufacturer' s specifications.
→  35
The power consumption of I/O modules with passive PFS output can be limited for certain applications.
• Recommended: Power consumption = 1 W.
This is obtained for a supply voltage at the terminals of 27 V DC.
• For higher supply voltages (U
consumption  table below.
Table for the PFS serial resitance (R
Power consumption
Total power consumption
Internal resistance R
I
): Insert a serial resistance (R
max
):
V
1.0 W
1.88 W
760 
XA00689F-A
) in order to limit the power
V
23