Due to possible significant interference in industrial installations appropriate measures
assuring correct operation of the unit must be applied. To avoid the unit of improper
indications keep recommendations listed below.
Connections of measurement signal and relay output should be made by screw connectors
mounted inside the housing.
Avoid common (parallel) leading of signal cables and transmission cables together with power
supply cables and cables controlling induction loads (e.g. contactors). Such cables should
cross at a right angle.
Contactor coils and induction loads should be equipped with anti-interference protection
systems, e.g. RC-type.
In the case of magnetically induced interference the use of twisted couples of signal cables (so-
called “spirals”) is recommended.
Installation should be conducted by qualified personnel. During installation all available
safety requirements should be considered. The
installer
is responsible for executing the
installation according to this manual, local safety and EMC regulations.
Wiring must meet appropriate standards and local regulations and laws.
Tighten the clamping screws. The recommended tightening torque is 0.5 Nm. Loose
screws can cause fire or defective operation. Over tightening can lead to damaging the
connections inside the units and breaking the thread.
The unit is equipped with housing, cover and gland or M12 connector, protecting against
water intrusion. Pay special attention to their correct tightening or clamping. In the case
of any doubt consider using additional preventive measures (covers, roofing, seals, etc.).
Carelessly executed assembly can increase the risk of electric shock.
0.25"
max. 0.08"
Figure 4.2. Method of cable insulation replacing and cable terminals
4.3. CONNECTION METHOD
CAUTION
Loop Powered Display
250 SERIES
05
