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3.6 4-20 mA Output Control
CAUTION:
If sending a 4-20 mA signal from a Phase Connect to a Phase
Technologies VFD, wires must be connected to I1- and COM in VFD. Wiring to I1+ and I1-
can damage the VFD control board and void warranty.
To manually control the speed of a Phase Technologies VFD relative to a 4-20 mA signal,
connect wires as shown in
. The wires connected to I_out and GND of the Phase
Connect are used to send a manual 4-20 mA signal from the portal to the VFD 4-20 mA
input. The wires connected to AUX 1 and COM of the VFD are used to provide
RUN/STOP
commands from the portal. If the VFD is in AUTO mode and the proper settings are
selected, a RUN command will prompt the drive to ramp to the frequency corresponding
with the
4-20 mA Output
signal from the portal. Use the
Config
page to select units and
the range of the analog output.
When controlling a
4-20 mA Output
signal from the portal, the user will select a value in
their chosen units (psi, GPM, or feet). This value will be converted to a 4-20 mA signal
before being sent to the device.
Figure 11
– 4-20 mA Output Control
Phase Technologies VFD Settings:
SYSTEM CONFIG
= Speed Control
Proportional to 4-20 mA Signal
