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6
FCB100, FCB400 COMMISSIONING AND PROVING | PG/CORIOLIS/PROVING-EN REV. A
4 Electrical connections
Change from one to two columns
Flow computer
In order to power the passive pulse output and condition the
signals individually, it is necessary to add resistors.
1. When using a flow computer, the resistors can be integrated
into the control cabinet of the flow computer. The cable
between the Coriolis sensor and the flow computer needs to
be connected as shown below.
For proving the additional cable can be connected in parallel
to this cable: in the flow computer cabinet or in the Coriolis
sensor connection box.
2. In all other cases the resistors can be integrated in the
connection area of the Coriolis sensor connection box. This is
the case if the sensor needs to be disassembled out of the
pipe for proving.
1 Input channel for flowmeter pulses
2 Jumper wire (between GND and input pulses −)
R1
1 kΩ / 0,5 W (between GND and input pulses +)
R2
2 kΩ / 0,5 W (between 24 V DC and input pulses +)
Threshold flow computer should be 3,5 V ±0,5 V
Figure 3: Flow computer terminals – without internal ground connection
If there is still an internal ground connection between the power
supply and the pulse channel input the jumper wire isn´t needed.
1 Input channel for flowmeter pulses
R1
1 kΩ / 0,5 W (between GND and input pulses +)
R2
2 kΩ / 0,5 W (between 24 V DC and input pulses +)
Threshold flow computer should be 3,5 V ±0,5 V
Figure 4: Flow computer terminals – with internal ground connection
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