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Wiring the Line Power
Installation
The Model UTX878 operates on 15-30 VDC loop power. The label
on the side of the electronics enclosure lists the meter's required line
voltage and power rating. Be sure to connect the meter only to the
specified line voltage and with a shielded cable.
Refer to Figure 1-7 on page 1-13 to locate the power terminal block
and connect the line power as follows:
1. Follow the instructions on page 1-4 to prepare the unit before you
connect power.
!ATTENTION EUROPEAN CUSTOMERS!
To meet CE Mark requirements, all cables
must be installed as described in
Appendix B, CE Mark Compliance.
2. Connect the UTX878 case to the earth ground with a grounding
cable.
3. Strip 1/4-in. of insulation from the end of each of the two line
power leads.
4. Route the shielded cable through the conduit hole and connect the
power leads to the power terminal block as shown in Figure 1-7 on
page 1-13. Tie the shield drain wire to the ground bus bar inside
the UTX878, but leave the shield wire open on the power supply
end (to avoid AC ground loops and for CE certification).
5. Leaving a small amount of slack, secure the power line with the
cable clamp.
Note: If you are using a 4-20 mA loop current measuring resistor,
add the resistor in series with the power supply Loop_Rtn end
(TB3-2). You must configure the loop current measuring
equipment as follows:
•
The negative side (-) of the probe goes to the power supply
side of the resistor.
•
The positive side (+) of the probe goes to the UTX878 side
of the resistor.
6. If you are installing the UTX878 for the first time, refer to Chapter
2, Programming Site Data, and program the sections from page 2-
4 to 2-14 (the Status, Transducer, Pipe, Fluid and Path options) to
determine the appropriate transducer spacing to position the
transducers (see the next page).
March 2004
1-5
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