Allen-Bradley 1394-AM04/B 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 DC bus power from the system module into controlled three-phase AC output for driving servo motors.
The 1394-AM04/B Series B module is used in GMC and GMC Turbo multi-axis motion control systems. It provides closed-loop servo control capability when combined with compatible 1394 system modules, feedback devices, and Allen-Bradley servo motors. It is commonly applied in machine tools, packaging equipment, material handling systems, and other precision motion applications.
Product Parameters
| Parameter |
Description |
| Brand |
Allen-Bradley (A-B) |
| Model |
1394-AM04/B |
| Series |
Bulletin 1394 Digital AC Multi-Axis Motion Control System |
| Product Name |
Servo Axis Module |
| Origin / Place of Origin |
USA |
| Product Status |
New Surplus / Original New |
| Module Type |
Servo Amplifier / Axis Inverter Module |
| Application |
GMC / GMC Turbo Multi-Axis Servo Systems |
| Input Voltage |
530–680 VDC |
| 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 |
| Compatible Motors |
Allen-Bradley 1326AB Series Servo Motors |
| Control Function |
Position, Velocity, and Torque Control |
| Mounting Type |
1394 System Rack Slide-Lock Installation |
| Dimensions |
Approx. 350 × 280 × 50 mm |
| Weight |
Approx. 4.45–5 kg |
| Power Supply |
DC Bus from 1394 System Module |
| Discontinued |
Legacy product / discontinued series |
Q&A
Q: What is the main function of Allen-Bradley 1394-AM04/B?
A: It is a servo axis amplifier module that converts DC bus power into controlled AC output for one servo motor axis in a 1394 motion control system.
Q: Can the 1394-AM04/B operate independently?
A: No. It must be installed with a compatible Allen-Bradley 1394 system module because it receives DC bus power and control commands through the system architecture.
Q: Which motors are compatible with this module?
A: It is commonly used with Allen-Bradley 1326AB servo motor families and related 1394 motion control components.
Q: What are common failure symptoms?
A: Typical issues include axis faults, overcurrent alarms, DC bus errors, motor feedback faults, loss of servo enable, or abnormal positioning performance.
Q: What should be checked before replacement?
A: Verify the complete catalog number (1394-AM04/B), series revision, DC bus voltage, motor rating, feedback configuration, system module compatibility, and parameter settings.
Q: Is the 1394-AM04/B still commonly produced?
A: The Bulletin 1394 platform is a legacy motion control family, so replacement units are generally sourced from surplus or refurbished industrial automation inventories.
