46
CoriolisMaster FCB400, FCH400
CORIOLIS MASS FLOWMETER | CI/FCB400/FCH400-EN REV. H
… 6 Electrical connections
Installing the connection cables
General information on cable installation
Ensure that a drip loop (water trap) is used when installing the
connecting cables for the sensor.
When mounting the sensor vertically, position the cable entries
at the bottom.
If necessary, rotate the transmitter housing accordingly.
1
Drip loop
Figure 27: Laying the connection cable
Signal cable specification
The signal cable used for the connection of the transmitter and
sensor must fulfill at least the following technical specifications.
Cable specification
Impedance
100 to 120
Ω
Withstand voltage
120 V
Outer diameter
6 to 12 mm (0.24 to 0.47 in)
Cable design
Two wire pairs as a star-quad cable
Conductor cross-section
Length-dependent
Shield
Copper braid with approximately 85 % coverage
Temperature range
Application-dependent, for use in potentially
explosive atmospheres, observe the information
in
Temperature resistance for the connecting
cable
on page 13!
Maximum signal cable length
0.25 mm
2
(AWG 24)
50 m (164 ft)
0.34 mm
2
(AWG 22)
100 m (328 ft)
0.5 mm
2
(AWG 20)
150 m (492 ft)
0.75 mm
2
(AWG 19)
200 m (656 ft)
Recommended cables
It is recommended to use an ABB signal cable for standard
applications. The ABB signal cable fulfills the above-mentioned
cable specification and can be utilized unrestrictedly up to an
ambient temperature of T
amb.
= 80 °C (176 °F).
ABB signal cable
Ordering number
5 m (16 ft)
3KQZ407123U0500
10 m (33 ft)
3KQZ407123U1000
20 m (65 ft)
3KQZ407123U2000
50 m (164 ft)
3KQZ407123U5000
100 m (328 ft)
3KQZ407123U1H00
150 m (492 ft)
3KQZ407123U1F00
200 m (656 ft)
3KQZ407123U2H00
For marine applications, an appropriate certified signal cable
must be used.
ABB recommends the cable HELKAMA RFE-FRHF
2×2×0,75 QUAD 250V (HELKAMA order number 20522).
