VFD68 Variable Frequency Drives Product Bulletin 1
Refer to the QuickLIT website for the most up-to-date version of this document.
The VFD68 Variable Frequency Drive provides
three-phase motor speed control in a variety of HVACR
applications. The VFD68 drive is designed primarily for
condenser fan speed control on HVAC and
refrigeration condensing units, but can also be set up to
control a variety of pumps, blowers, and fans.
The VFD68 drive accepts input signals from
P499 Electronic Pressure Transducers, or other
devices that provide a 0–5 VDC, 0–10 VDC, or
4–20 mA signal.
The application-specific design of the VFD68 drive
provides a simple interface, which makes the drive
easy to understand and operate.
You can quickly and easily reconfigure the VFD68 drive
to control variable speed pumps in cooling and heating
applications, or to control variable speed supply fans in
VAV applications.
The VFD68 drive is an RS485, RTU-compliant
ModBus® slave device and can be integrated into a
ModBus network.
Figure 1: VFD68 Variable Frequency Drives
Table 1: Features and Benefits
Features Benefits
Selectable Input Types Allow use with 0–5 VDC (ratiometric), 0–10 VDC, or 4–20 mA input signals
from transducers, sensors, and controllers.
High Input Signal Selection of Two Similar
Inputs (230 or 460 volt models only)
Provides fan speed control of dual circuit condensing units, based on the
highest pressure circuit.
Compact Design Provides for easy and flexible installation.
Three-Phase, 230, 460, or 575 VAC Models Can control a wide variety of three-phase motors ranging up to 10 hp.
Simple and Advanced End-User Settings Provide quick and simple application setup and operation, as well as
advanced setup parameters for custom applications.
VFD68 Variable Frequency Drives
Product Bulletin
Code No. LIT-12012068
Issued October 2017
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