ONICON F-2600 - Manual (Page 38)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 38
2.6.7 Frequency Output Connections
The frequency output is used for a remote counter. It can be scaled to output a 1 to 10 kHz
signal proportional to mass or volume flow, temperature, pressure or density.
The frequency output requires a separate 5 to 36 VDC power supply and there are current
and power specifications that must be observed when using this output. The output can
conduct a current up to 40 mA and can dissipate up to 200 mW. The output is isolated
from the meter electronics and power supply.
Freq. Out -
Freq. Out + Freq. Out voltage = +V
Select resistor so that current
through Freq. Out <= 40 mA
Figure 21. Isolated Frequency Output Using External Power Supply
Freq. Out voltage = +V
Select resistor so that current through Freq. Out <= 40 mA
Freq. Out +
Freq. Out -
Figure 22. Non-Isolated Frequency Output Using External Power Supply
2.6.5 Optional Backlight Connection
The loop power meter has an optional backlight connection provided. It is intended to be
powered by a separate 12 to 36 VDC at 35 mA max. power supply or by the pulse power
input. Both options are shown below.
12 to 36 VDC
35 mA max.
Figure 23. Backlight Using External Power Supply