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6.5 ELECTRICAL INSTALLATION
Provide correct power supply to the interface box.
In order to maintain proper EMC protection a shielded cable should be used for 4-20 mA
output signals. Recommended cable: 0,50 mm², twisted pair, individually screened, braid
shielded and PVC insulated.
For correct installation a suitable isolation switch shall be installed in the supply line as
near as possible to the equipment. Maximum fuse current 16A.
To avoid signal grounding problems it is not recommended to connect more than one
device to each 4-20 mA output of the interface box.
1. Remove cover from interface box.
Check that the power supply is connected to terminal J2 in accordance with power
supply source and assure that power can be interrupted by a connector in the cable or
circuit breaker in the proximity of the interface box.
Make sure that the wire to PE is always longer than power wires.
Figure 9 Power supply terminal J2
2. Feed the cable from
ViscoSense
®
3
sensor through gland and connect wires to terminal J6 in
accordance with figure 12.
3. Feed the cable for 4-20 mA viscosity, temperature and density output signals through the cable
glands and connect wires to terminal J1 in accordance with figure 12. When no temperature output
is connected to 3 and 4 on J1 (figure 12), terminals 3 and 4 must be connected together with a wire
link.
4. Feed the cable for power supply through the cable gland and connect the wires to terminal J2 in
accordance with figure 12.
To maintain proper EMC protection the cable glands provided with the interface box
should not be exchanged for cable glands of any other make/type.
5. Make sure that all connectors are properly seated before closing the cover again.
6.
Close the cover of the interface box.
