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NEMA 4X (Washdown) AC Variable Frequency Drives (VFD)
NEMA 4X rated variable frequency drives (VFD) enable speed control for 3-phase AC motors such as those in conveyors and pumps, and are suitable for washdown-duty applications. They offer V/Hz, sensorless vector or field oriented vector control up to 30hp.
The NEMA 4X environmental rating is given to drive enclosures that are washdown duty-rated and built to withstand a
harsh environment. Food and beverage processing and water treatment facilities (both indoors and outdoors) are examples
of harsh environments where the equipment will be subject to repeated high-pressure washdowns.
The NEMA 4X enclosure also allows you to mount the VFD directly to a machine, outside of an electrical panel. This
can eliminate long runs of expensive VFD cable for motor wiring, reduce the need for external VFD output filters and
in some cases simply provide a convenient, self-contained motor control at the machine or conveyor with an optional
OSHA certified lock-out/tag-out disconnect.
For part listings and specifications, go to Shop Now
WEG CFW500 series drives are high-performance AC variable frequency drives that support closed-loop flux
vector speed control as well as torque control modes and can operate both AC Induction motors and permanent
magnet AC motors. These models are offered in an IP66/NEMA 4X enclosure up to 20hp.
Rated for washdown applications and suitable for use in direct sunlight
200-240 VAC 1-phase up to 3hp, 3-phase up to 10hp
380-480 VAC 3-phase up to 20hp
Control modes include Scalar, Vector Control (Sensorless and closed-loop with encoder feedback), and VVW PM
(suitable for fan, pump and compressor)
0 to 500 Hz output frequency range
2.5 to 15 kHz adjustable switching frequency (5 kHz standard)
Speed and torque control down to 0 (zero) rpm & precision of 0.01% for speed control are attainable with
closed-loop encoder feedback using vector control
Linear and "S" ramp acceleration and deceleration
Motor slip compensation
Electronic pot, preset speeds & Jog modes
Adjustable V/Hz profile
Adjustable output current limit
Flying start / ride-thru
PID regulator & PID sleep mode
AC Induction motors or Permanent magnet AC (PMAC) motor support
Built-in RS-485 (Modbus RTU) communication
Plenty of built-in I/O, expandable with option modules
Built-in 24VDC power supply (max. 150 mA)
STO - Safe Torque Off (TUV certified) with option module
Optional remote keypads
IronHorse ACN NEMA 4X AC Drives
The ACN series of NEMA 4X sensorless vector AC drives have features normally only found on more expensive drives, in a NEMA
4X enclosure and at a great price.
These drives offer an advanced remote keypad, Ethernet option cards so the drive can communicate over Modbus TCP and
EtherNet/IP, and the option to configure and program using the free, user-friendly VFD Suite software.
ACNxx series drives support 4 control modes which include V/Hz, slip compensation, sensorless vector and torque control.
230 VAC: three-phase up to 20hp, single phase up to 10hp
460 VAC: three-phase up to 30hp, single-phase up to 15hp
Single-phase UL Ratings - 230 or 460 VAC input
Can be used with AC induction motors or permanent magnet AC motors (PMAC)
Lockable, integrated disconnect or no-disconnect models
Output frequency to 400Hz (120Hz sensorless vector)
STO - Safe Torque Off (SIL2)
Built-in user sequence programming of 18 steps
Optional LCD text-based keypad can be remotely mounted with IP66 case
Local/Remote control mode selection or digital/comm input with Hand/Off/Auto control
Momentary power loss restarts
Analog I/O - configurable 2 Inputs and 1 output
Built-in dynamic braking
PID controller - including sleep and wake
High speed communication interfaces with MODBUS RTU built-in, with optional EtherNet/IP and ModbusTCP communication card
Fire Mode - run fire mode during emergencies to have uninterrupted smoke removal and system pressure
DURApulse GS20X NEMA 4X AC Drives
The DURApulse GS20X new generation high performance vector control drives provide many standard and advanced functions -
all in a compact unit that has been reduced 40% in size. The NEMA 4X version provides service in the harshest of environments
and offers many great features including dynamic braking, single-phase input capability (ALL 230VAC drives can be supplied
single-phase), a built-in PLC, and optional EtherNet/IP and ModbusTCP communication. The drive supports up to four
(4) independent IM motor parameter sets or supports control of a single AC PM motor.
DURApulse GS20X AC drives offer several different speed control modes: standard V/Hz with pulse input feedback, sensorless
vector (SVC) for Induction Motors (IM) and Permanent Motors (PM), and ultra-precise Field Oriented Vector control (FOC) for
maximum open loop speed regulation control.
Compact modular design
NEMA 4X available up to 10hp
Single-phase/three-phase 230 VAC up to 7.5hp
Three-phase 460 VAC up to 10hp
Output frequency to 600Hz
Speed control potentiometer built in
Built-in PLC to support up to 2K steps
Built-in USB port for fast & easy programming
Free downloadable software for drive configuration and PLC programming
Field-upgradable firmware (drive & communication option card)
Optional remote LCD keypad
Momentary power loss restarts
100kA Short Circuit Current Rating
Digital I/O - configurable (7) digital inputs (including one pulse train input up to 33kHz); (2) digital outputs
(1) SPDT relay output
(1) frequency output
(2) STO (Safe Torque Off) inputs
Analog I/O - configurable (2) Inputs and (1) Output