Product Description
The Allen-Bradley 1394-AM04-B is a versatile 3kW servo amplifier axis module designed for 1394 GMC/GMC Turbo systems. Compatible with Series A, B, and C servo controllers, it converts DC power to variable AC voltage without a heatsink. Each servo motor requires one module, easily connected via a slide-and-lock mechanism, eliminating numerous wire terminals. A 1394 system typically uses 1-4 modules. Economical and efficient, it features a 530-680V DC input, 4.5-9A current, 98% power efficiency, 110F capacitance, 2.6 RMS A/mV inert gain, and weighs 11.02 pounds with dimensions of 13.78 x 11.02 x 1.97 inches.
Is Your Device Showing These Signs?
The Allen Bradley 1394-AM04-B commonly experiences issues related to failed electrolytic capacitors within the power supply, leading to drive faults and communication errors on the SERCOS interface. Resolving this requires replacing the capacitors and inspecting/replacing any damaged surface mount components. Encoder feedback problems due to faulty resolvers or damaged resolver cables are also frequent. Overcurrent faults are addressed by examining the IGBT modules for shorts or open circuits and verifying proper gate drive signals. Firmware corruption necessitates reprogramming the drive controller with the correct software version.
Technical specifications
The Allen-Bradley 1394-AM04-B is a Servo Amplifier/Servo Drive Axis Module compatible with Series A, B, and C, and the 1394 GMC/GMC Turbo system. It features a 3 kW output power rating, 530 to 680 VDC input voltage, and 4.5 to 9 A input current, functioning as a DC to Variable AC Voltage Inverter (without heatsink). One module is required per servo motor in a 1394 system, supporting 1 to 4 axis modules per system, utilizing a slide-and-lock connection mechanism. Power dissipation is 2.4/3 kW at 380 VAC and 4.8/6 kW at 460 VAC, with a 98% power efficiency, 110 F capacitance, and 2.6 Inert Gain (RMS A/mV). It weighs 11.02 lbs (average) and measures 13.78 x 11.02 x 1.97 inches.
Our Repair Process for the
1394-AM04-B
Our repair process for the Allen Bradley 1394-AM04-B begins with a thorough evaluation to confirm the reported fault. We then proceed to replace all electrolytic capacitors in the power supply, followed by a meticulous inspection and replacement of any damaged surface mount components. The encoder feedback system is tested, and faulty resolvers or damaged resolver cables are replaced. Overcurrent faults are addressed by testing the IGBT modules for shorts or opens and verifying the integrity of the gate drive signals. Finally, if firmware corruption is suspected, the drive controller is reprogrammed with the correct firmware version.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
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Ships from Rochester, NY