KROHNE OPTIMASS with MFC 05x EN - Manual (Page 40)

Installation and Operating Instructions OPTIMASS 39
2 Electrical Installation
2.1 Location and connecting cables
Location
Do not expose the compact flow meter to direct sunlight in hot climates. Install a sunshade if necessary.
Connecting cables
To conform to protection category requirements, observe the following recommendations:
• Fit blanking plug and apply sealant to unused cable entries.
• Do not kink cables directly at cable entries.
• Provide water drip point (U bend in cable).
• Do not connect rigid conduit to cable entries.
• Only cables of diameter 7 to 12 mm or ¼” to ½” can be used.
2.2 Connection to power
Please ensure that the information about power given on the data plate corresponds to the locally
available mains voltage.
• Note information given on the instrument data plate (voltage, frequency)!
• Electrical connection in conformity with IEC 364 or equivalent national standard. Special regulations
apply to installation in hazardous areas. (See supplementary installation and operating instructions)
• The PE protective ground conductor must be connected to the separate U-clamp terminal in the
terminal box of the signal converter.
• Do not cross or loop the cables in the terminal box of the signal converter. Use separate cable glands
for power and output cables.
• Ensure that the screw thread of the round cover on the terminal box is well greased at all times.
Note:
• The grease used must be non-corrosive to aluminium; typically it must be resin- and acid-free.
• Protect sealing ring from damage.
2.2.1 Power Supply Wiring MFC050
Power and signal connections for MFC 050
2.2.2 Power Supply Wiring MFC051 Non Ex
24 V AC/DC 100 – 230 V AC mains
Outputs and
connections
PE
N L AC
– + DC
L N
PE
Outputs
24 V AC/DC
PE