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2.4 Drive Configuration and Options
SD & 2XD Series drives can be configured with a variety of optional equipment. Please remember to
follow all applicable NEC and local codes to ensure safety and compliance.
CAUTION: When not ordered and installed by Phase Technologies, circuit breakers or fuses,
proper ground circuits, disconnects and other safety equipment and their proper installation are the
responsibility of the end user.
CAUTION: The AC motor load must be connected directly to the main output terminals of the
panel. Do not install relays or disconnect switches between the output terminals and the motor
load.
Fuses or motor overload devices as required by NEC and local safety codes may be installed between
the drive and the motor, however the SD & 2XD Series are equipped with adjustable solid state motor
overload protection.
Output Filters
Some installations may require a load reactor or sine wave filter between the drive and the motor. A
filter reduces harmonics in the PWM output voltage, smoothing the waveforms to reduce vibration in the
motor. Filters also reduce common mode currents in the motor windings that can discharge through
motor bearings, causing pitting and premature motor failure.
Mitigating Electromagnetic Interference (EMI)
Devices that utilize power switching electronics, such as SD & 2XD Series drives, produce high
frequency emissions commonly known as electromagnetic interference (EMI). These emissions can be
conducted on power cables or emitted (radiated) through the air. Conducted and emitted noise can
sometimes interfere with radio signals or sensitive electronic equipment near the installation. The use
of shielded cables and rigid metal conduit on both input and output lines between the converter and the
motor is recommended to help reduce EMI.
2.5 System Configuration Settings
A SD & 2XD Series drives are capable of operating several types of systems, including:
• Simple ON/OFF motor control from the keypad or remote switches
• Digital constant pressure water systems
• Analog constant pressure water systems
• Multiple pump control
Firmware in the drive interprets input signals and other data differently, depending upon the type of
system being operated. It is therefore important to select the appropriate System Configuration setting
either through the Programmable Parameters on the keypad. Detailed information on setting System
Configuration can be found in Section 6.5.
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