NuFlo MC-II Plus Panel Mount, Руководство пользователя

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Appendix A1
MC-II Plus WP-PM Flow Analyzer
May 2005 A1-3
Flow Meter Frequency Output
The Flow Meter Frequency Output (formerly called Amp & Square Output) provides
an open drain transistor output at the turbine meter frequency, which may be used to
provide flow rate and/or volume information to peripheral equipment. The output
requires a two-conductor cable from the Panel Mount MC-II
Plus Flow Analyzer to
the remote frequency readout device requiring 50 mA or less and a 5 to 30 VDC
power supply. The Flow Meter Frequency Output wiring diagram is located on page
A1-14.
The Flow Meter Frequency Output and 4-20 mA Rate Output are not isolated from
each other. If both outputs are required, verify that the power supplies and readout
devices associated with each output are completely isolated from each other.
Caution must also be taken when using the Flow Meter Frequency Output while
powering the device from an external power supply since both share a common
negative (-) connection. The power supplies must share a common negative (-)
terminal or be totally isolated from each other.
The Flow Meter Frequency Output terminals on the MC-II
Plus circuit assembly are
labeled “A&S Out” representing Amp & Square Output.
Remote Reset Input
The Remote Reset Input allows the operator to reset the accumulated volumes on
the Panel Mount MC-II
Plus Flow Analyzer to zero without requiring multiple
operations from the switchplate . This input is optically isolated and bi-polar. It may
be connected in a sink or source mode. The input is shown connected in two ways,
with a 3 to 30 VDC power supply and switch in a remote location, or using the MC-II
Plus battery to reset the volume locally. The Remote Reset Input wiring diagrams
are located on pages A1-15 and A1-16.