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2 year warranty

20FN4042 Image 1
Reliance Electric Rockwell FlexPak 3000 FP3000 10/20 HP. Call Now! - Wiring Diagram Image


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Reliance Electric 20FN4042 20 HP 50/60 Hz FlexPak 3000 Motor Controller



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  • Part Number: 20FN4042
  • SKU: 20FN4042RE
  • Manufacturer: Reliance Electric
  • Series: FlexPak 3000

20FN4042 Technical Specifications

Manufacturer Reliance Electric
Series FlexPak 3000
Part Number 20FN4042
HP 20 HP
Input Voltage 460 VAC
Hz 50/60 Hz

Product Description

20FN4042 is a DC motor drive from the FlexPak 3000 series, distributed by Reliance Electric. This drive is designed to have a wireless construction, and it has a non-regenerative output of 20 HP. By design, it is a full-wave power converter without a back rectifier. The system contains both a major and minor digital current loop with the purpose of regulating voltage and speed to the armature. The primary feedback system is a DC tachometer which is fed into the terminal control block. The associated user interface utilizes various keys and an LCD screen to display status and programming information information. This User interface is capable of operating in English, French, Spanish, German, Italian, and an externally specified ‘Code’ language. The drive can either be controlled locally using this user interface or by inputs and outputs using the Control Terminal Block.

All logic-based inputs operate at 24 VDC. Logic based outputs have a 250 volt maximum of 250 VAC and 30 VDC and indicator statuses such as Running, Alarm, and No Fault. The analog inputs and outputs on the controller operate at +/- 10 VDC except for the tachometer input which cannot exceed 250 VDC or 275 rms VAC. The manual mode reference includes a potentiometer that is a 5KΩ minimum. It is the responsibility of the user to ensure appropriate installation of the drive in accordance with all electrical rules and regulations. It is also necessary to use the appropriate power source and external equipment, as specified in the drive requirements. Failure to do so may result in serious bodily injury.

Frequently Asked Questions about 20FN4042

What is the DC field rating on a FlexPak 3000 20FN4042 drive?
The DC field rating on a 20FN4042 drive is 150/300 VDC.
What output is a Reliance Electric 20FN4042?
The Reliance FlexPak 3000 20FN4042 drive has a 240/500 VDC output.
Which parameter selects the speed of the 20FN4042 drive?
On a 20FN4042 drive, the maximum speed parameter is parameter P.004. The minimum speed parameter on a 20FN4042 is P.003. The max speed is typically set to 500 RPM on a 20FN4042 and the minimum speed is usually set to 250 RMP on a 20FN4042.
Where can I find a manual for the 20FN4042?
We are happy to send you the link to the FlexPak 3000 DC Drive Instruction Manual. The manual goes through all types of configuration on a 20FN4042 and the manual provides lists of parameters and faults or alarms you might find on a 20FN4042.

Repair Services For 20FN4042

Type Lead Time Price Action
Repair Service 1-2 weeks $3920

Our highly skilled technicians can repair your 20FN4042. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
Learn More

20FN4042 Manuals, White Papers, Data Sheets, and Troubleshooting