User`s manual

AX2200/AX2300 Instruction Manual Chapter 2 Installation
CM2-AX2000-2001 (Rev. 4, 4/2014) 2-29
Figure 2-31. Non-Isolated 4–20 mA Output Using Meter Input Power Supply
Figure 2-32. Isolated 4–20 mA Output Using Meter Provided Power Supply
Frequency Output Connections
The frequency output is used for a remote counter. It can be scaled to out-
put a 1 to 10 kHz signal proportional to mass or volume flow, tempera-
ture, pressure or density.
The frequency output requires a separate 5 to 36 VDC power supply;
however, there are current and power specifications that must be ob-
served. 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 pow-
er supply.
There are three connection options for the frequency output–the first with a
separate power supply (Figure 2-32), the second using the flow meter power
supply (Figure 2-33)(DC powered units only), and the third using the inter-
nal 24 VDC power supply (Figure 2-34)(AC powered units only). Use the
first option with a separate power supply (5 to 36 VDC) if a specific voltage
is needed for the frequency output. Use the second configuration if the volt-
age at the flow meter power supply is an acceptable driver voltage for the
load connected. (Take into account that the current used by the frequency
load comes from the meter’s power supply). Use the third configuration if
you have an AC powered unit only. In any case, the voltage of the frequen-
cy output is the same as the voltage supplied to the circuit.