ABB FXE4000 Inbetriebnahmeanleitung Seite 50

Installation
Observe the following items when routing cables:
• The signal and excitation current cable carries a voltage signal of only a few millivolts and
therefore must be routed the shortest distance possible. The maximum permissible signal
cable length is 50 m.
• Avoid routing the cable in 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/excitation current cable through a metal pipe and connect this to the ground.
• All leads must be shielded and connected to station ground.
• Do not run the signal cable over junction boxes or terminal blocks. A shielded excitation
cable (white) is run parallel to the signal lines (red and blue). As a result, only one cable is
required between the flowmeter primary and the transmitter.
• To shield against magnetic interspersion, the cable contains outer shielding that is attached
to the SE clamp.
• Make sure during installation that the cable
is provided with a water trap (1). For vertical
installation, align the cable glands pointing
downward.
3.4.2 Signal and excitation cable connection for model FXE4000 (MAG-XE)
The flowmeter primary is connected to the
transmitter via the signal / excitation current
cable (part no. D173D025U01). The coils of
the flowmeter primary are supplied with a field
voltage by the transmitter over terminals
M1/M2. Connect the signal/excitation current
cable to the flowmeter primary as shown in the
figure.
1 red
2 blue
3 yellow
4 SE clamp
5 Signal cable
6 Ground connection
7 white
Terminal designation
1 + 2
3
M1 + M2
SE
16 - EN
Connection
Wires for the measuring signal.
Internal lead (yellow), measurement potential.
Connections for magnetic field excitation.
Outer cable shield.
FXE4000 (COPA-XE/MAG-XE)
Fig. 18
Fig. 19
D184B133U02