Rev 3 (XXXX 2019)
NexU INSTALLATION MANUAL
34
3.3.8 NETWORK CABLING
NexU cabling has five wires (BLUE / WHITE / SCREEN / RED / BLACK). Although is not
compulsory to follow this sequence, it is highly recommended to do so in order to follow this
manual.
Following international conventions, blue / white and screen are used for transferring
information and red / black are used for supplying power (in our case 24 VDC)
Not in all cases, all the elements have to be powered up by the network. In some of the
elements, power comes from external source. As a brief summary
UDat / UDat Power+: 110 VAC / 240 VAC from customer power electric network.
UPower / UPower+: 110 VAC / 240 VAC from customer power electric network.
UValve: 24 VDC from NexU network.
UCount: 24 VDC from NexU network.
UView: 24 VDC from NexU network.
UMeter/ UMeter+: 24 VDC from NexU network.
UVision / UVision+: 24 VDC from NexU network.
UPulser / UPulser+: 24 VDC from NexU network.
UTank: 110 VAC / 240 VAC from customer power electric network.
UNet: 110 VAC / 240 VAC from customer power electric network.
Units that are powered up by the customer power electric network, transfer power to the
units that are powered by the NexU network. Therefore DO NOT POWER UP TWO UNITS AT
THE SAME TIME FROM DIFFERENT 110 VAC / 240 VAC SOURCES.
As a guideline, the maximum length of a wiring coming from a 110 VAC / 240 VAC source
has to be:
Max Lenght =
120
No. of Units
2 < No. of Units < 8
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