FEP630, FEH630 ELECTROMAGNETIC FLOWMETER | OI/FEP630/FEH630-EN REV. D 35
Notes on signal cable installation
(only for remote mount design)
Observe the following points when installing the signal cable:
• The maximum signal cable length is 200 m (565 ft).
• Only used signal cable which is in accordance with the
following cable specifications.
• Avoid the vicinity of electrical equipment or switching
elements that can create stray fields, switching pulses
and induction. If this is not possible, run the signal /
magnet coil cable through a metal pipe and connect this
to the station ground.
• To shield against magnetic interspersion, the cable
contains outer shielding. This should be connected to the
SE clamp.
• Do not damage the sheathing of the cable during
installation.
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 200 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 Depends on application.
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 with the order
number 3KQZ407123U0100 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).
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).
Connection with IP rating IP 68
G10171
1
1 Maximum flooding height 5 m (16.4 ft)
Figure 43: Maximum flooding height for IP 68 sensors
For sensors with IP rating IP 68, the maximum flooding height is
5 m (16.4 ft).
The supplied signal cable fulfills all the submersion
requirements.
The sensor is type-tested in accordance with EN 60529. Test
conditions:
14 days at a flooding height of 5 m 16.4 ft).
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