Commissioning
16 - EN
CoriolisMaster FCM2000
CI/FCM2000-EN
5.2.3 NAMUR
Contact
The switching output and the pulse output (terminals 41, 42 / 51, 52) can be wired internally as
a NAMUR contact for the purpose of connecting to a NAMUR amplifier; this is achieved by
setting the jumpers accordingly. The standard wiring shown below is the factory default. The
switchover is performed via jumpers (Fig. 4). See also the section titled "Electrical connections".
G00368
Jumper positions
Standard configuration
preferred for
Ex "e"
(default configuration)
NAMUR configuration
preferred for
Ex "i"
Fig. 4:
Positions of jumpers
The safety specifications for intrinsically safe circuits can be found on the EC type-
examination certificate.
• Make sure that the cover over the voltage supply connection is tightly closed. With
intrinsically safe output circuits, the terminal box can be opened.
• It is recommended that you use the cable glands supplied (not for the -40 °C [-40 °F]
version) for the output circuits as appropriate for the relevant type of protection:
• Intrinsically
safe: Blue
• Non-intrinsically
safe:
Black
• The sensor and the transmitter housing must be connected via the equipotential bonding.
For intrinsically safe current outputs, equipotential bonding needs to be in place all the way
along the circuits.
• If the sensor is insulated, the maximum insulation thickness is 100 mm (4"). The transmitter
housing must not be insulated.
• After switching off the flowmeter, wait t > 2 minutes before opening the transmitter housing.
• When commissioning the flowmeter, refer to EN 61241-1:2004 regarding use in areas
containing combustible dust.
• The operator must ensure that, when connecting the protective conductor (PE), no potential
differences exist between the protective conductor and the equipotential bonding (PA), even
in the event of a fault.
Special information for use in Category 1:
• The inside of the meter tube or nominal sizes
≥
DN 50 (2") may correspond to Category 1
(Zone 0). The corrosion resistance of the materials must be taken into account.
2
1
2
1
1
2
1
2
