KROHNE OPTIMASS with MFC 300 EN - Manual (Page 75)

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Cover, electronics compartment
1
Locking screw, 1/2 turn left/right to open/close cover (2)
2
Cover for the three separate terminal compartments for power, sensor connection and
inputs/outputs
3
Safety lever to open cover (1)
4
Sensor terminal compartment, open separate cover
5
Terminal compartment, outputs/inputs
6
Power terminal compartment, open separate shock-hazard protection cover
7
Entry fitting for sensor cable
8
Two cable entries for outputs/inputs
9
Cable entry for power supply
9.5 Mains Power Connection versions C, F and W
PLEASE NOTE!
• The degree of protection in relation to IP 65 and 67 to IEC 529 / EN 60529, (NEMA 4 / 4X) is
dependent on the version.
• The housings of the flowmeters, which are designed to protect the electronic equipment
from dust and moisture, should be kept closed at all times. Creepage distances and clear-
ances are dimensioned to VDE 0110 and IEC 664 for pollution severity 2. Supply circuits are
designed for overvoltage category III and the output circuits for overvoltage category II
• Fuse protection for the infeed power circuit, and also a disconnecting device (switch, circuit
breaker) to isolate the signal converter must be provided.
100...230 Volt AC (tolerance range: -15%...+10%)
• Note the data on the nameplate, power supply voltage and frequency range (50...60 Hz).
• The protective ground conductor PE of the power supply must be connected to the separate
terminal in the terminal compartment of the signal converter.
• Connection diagrams I - II for the power supply and the electrical connection between flow
sensor (primary head) and signal converter are provided in this section.
12...24 Volt DC (tolerance range: -25%...+30%)
• Note the data on the instrument nameplate!
• For reasons to do with the measurement process, connect a functional ground FE to the
separate U-clamp terminal in the terminal compartment of the signal converter.
• When connecting to functional extra-low voltages, provide a facility for protective separation
(PELV) (VDE 0100 / VDE 0106 and/or IEC 364 / IEC 536 or relevant national regulations).
• Connection diagrams I - II for the power supply and the electrical connection between flow
sensor and signal converter converter are provided in this section.
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