A-B | 1394-AM04 | 1394 Digital AC Multi-Axis Servo Axis Module

The A-B (Allen-Bradley) 1394-AM04 is a servo axis module designed for the Allen-Bradley Bulletin 1394 Digital AC Multi-Axis Motion Control System. It functions as an individual servo amplifier module, converting the system DC bus voltage into controlled three-phase AC output for driving servo motors in precision motion applications.

The 1394-AM04 is used with 1394 GMC and GMC Turbo motion control systems and supports applications requiring coordinated multi-axis positioning, speed control, and torque control. It is compatible with Allen-Bradley servo motor systems such as the 1326AB series and is commonly found in industrial equipment including packaging machines, machine tools, material handling systems, and production automation lines.

Product Datasheet

Parameter	Description
Brand	A-B (Allen-Bradley)
Model	1394-AM04
Series	Bulletin 1394 Digital AC Multi-Axis Motion Control System
Product Name	Servo Axis Module / Servo Amplifier Module
Module Type	AC Servo Drive Axis Module
Function	Converts DC bus power into controlled AC output for servo motor operation
Compatible System	Allen-Bradley 1394 GMC / GMC Turbo Systems
Input Voltage	530–680 VDC DC Bus
Input Current	Approx. 4.8 A
Output Voltage	310/390 VAC, 3 Phase
Continuous Output Current	4.5 A
Peak Output Current	9 A
Output Power	2.4 kW @ 310 VAC / 3 kW @ 390 VAC
Output Frequency	0–240 Hz
Efficiency	Approx. 98%
Compatible Motors	Allen-Bradley 1326AB / 1326AS Servo Motors
Mounting Type	1394 rack slide-lock installation
Origin / Place of Origin	USA
Product Status	Legacy Industrial Spare
Dimensions	Approx. 350 × 280 × 50 mm
Weight	Approx. 4.45 kg
Power Supply	Shared DC bus from 1394 system module
Operating Temperature	0°C to +50°C typical
Discontinued	Yes, replaced by newer Kinetix servo platforms

Common Questions & Answers

Q: What is the main function of the Allen-Bradley 1394-AM04?
A: It acts as a servo amplifier axis module, receiving motion commands from the 1394 controller system and supplying controlled power to a servo motor.

Q: Can the 1394-AM04 operate independently?
A: No. It must be installed in a complete 1394 GMC/GMC Turbo system with the appropriate system module and controller.

Q: What motors are compatible with this module?
A: It is commonly used with Allen-Bradley 1326AB and related servo motor families.

Q: What are common failure symptoms?
A: Typical problems include axis faults, overcurrent alarms, DC bus faults, motor positioning errors, communication loss, or amplifier hardware failures.

Q: What should be checked before replacement?
A: Verify DC bus voltage, motor compatibility, axis configuration, feedback wiring, controller communication, and system parameters before installation.

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