Electrical connections
OI/FEX300/FEX500-EN FEX300, FEX500 41
Observe the following points when routing cables:
• A magnet coil cable (red and brown) is run parallel to the signal lines (violet and blue). As a
result, only one cable is required between the sensor and the transmitter. Do not run the
cable over junction boxes or terminal blocks
• The signal cable carries a voltage signal of only a few millivolts and must, therefore, be
routed over the shortest possible distance. The max. allowable signal cable length is 50 m
(164 ft) without pre-amplifier and 200 m (656 ft) with pre-amplifier.
• 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/magnet coil cable through a metal pipe and connect this to the station ground.
• All leads must be shielded and connected to earth ground.
• To shield against magnetic interspersion, the cable contains outer shielding that is attached
to the SE clamp.
• The supplied stranded steel wire is also connected to the SE clamp
• Do not damage the sheathing of the cable during installation.
• Make sure during installation that the cable
is provided with a water trap (1). For vertical
installation, align the cable glands pointing
downward.
Fig. 36
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