DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Startup Guide (1- and 2-Channel) 5
Chapter 1. Installation
1.7 Making Electrical Connections
!ATTENTION EUROPEAN CUSTOMERS!
To meet CE Mark requirements, all cables must be installed as described in Appendix A,
CE Mark Compliance.
This section contains instructions for making all the necessary electrical connections to the Model DF868 flowmeter.
Refer to Figure 10 on page 16 for a complete wiring diagram of the unit.
IMPORTANT: For meters supplied in one of the optional enclosure styles, refer to Appendix C, Optional Enclosures,
for the appropriate wiring diagram and specific wiring instructions.
Except for the power connector, all electrical connectors are stored in their terminal blocks during shipment and may be
removed from the enclosure for more convenient wiring. Feed the cables through the conduit holes on the bottom of the
enclosure, attach the wires to the appropriate connectors and plug the connectors back into their terminal blocks.
Note: For compliance with the European Union’s Low Voltage Directive (73/23/EEC), a transparent plastic shroud
protects the electrical connections. The shroud must remain in place, except while wiring the unit. Reinstall the
shroud after the wiring has been completed.
Once the Model DF868 is completely wired, proceed to Chapter 2, Initial Setup, to configure the unit for operation.
1.7.1 Wiring the Line Power
!ATTENTION EUROPEAN CUSTOMERS!
To meet CE Mark requirements, all cables must be installed as described in Appendix A,
CE Mark Compliance.
The Model DF868 may be ordered for operation with power inputs of 100-120 VAC, 220-240 VAC, or 12-28 VDC.
The label on the shroud inside the electronics enclosure, just above the
TB1 line power terminal block, lists the required
line voltage and the fuse rating for the unit (the fuse rating is also listed in Chapter 4, Specifications). Be sure to
connect the meter only to the specified line voltage.
Note: For compliance with the European Union’s Low Voltage Directive (2006/95/EC), this unit requires an external
power disconnect device such as a switch or circuit breaker. The disconnect device must be marked as such,
clearly visible, directly accessible, and located within 1.8 m (6 ft) of the Model D
Note: Only use Class 2 Rated Power supply for line power connection to DC instrument.
Refer to Figure 3 on page 6 or Figure 10 on page 16 to locate terminal block TB1 and connect the line power as follows:
WARNING! Improper connection of the line power leads or connecting the meter to the incorrect line
voltage will damage the unit. It will also result in hazardous voltages at the flowcell and
associated piping and within the electronics console.
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