Axis-module connection map
1394C-AM03 / 1394C-AM50 turn the common 1394 DC bus into model-specific servo motor current and close the assigned axis loop with motor feedback.
Allen-Bradley1394 Series C Axis Modules
Allen-Bradley 1394C-AM03 / 1394C-AM50 1394C servo amplifier axis modules
Product Overview
Allen-Bradley 1394C-AM03 / 1394C-AM50 are Series C 1394 axis modules that receive the shared 530/680 V DC bus from a compatible 1394 system module and create controlled three-phase motor output for one axis. AM03 is the lower-current module; AM50 is the high-power module with fan-cooled hardware. Both modules use 5 kHz modulation and are specified at 98% efficiency.
The current envelope of 1394C-AM03 / 1394C-AM50 differs sharply. AM03 supplies 3.0 A rms continuously and 6.0 A peak for one second, while AM50 supplies 23.3 A continuously and 33.2 A peak. Their rated 360/460 V motor-output power is 1.6/2 kW and 11.34/15.6 kW, respectively. The AM50 current stage and capacitance are much larger than those of AM03.
Within a 1394 system, 1394C-AM03 / 1394C-AM50 keep DC-bus input, three-phase motor output, motor feedback, thermal/brake leads, and control data in separate paths. Module order, bus loading, motor compatibility, cable size, cooling, and configured current limits must follow the exact AM03 or AM50 hardware rather than the common Series C label. Feedback compatibility remains part of the motor-and-axis-module combination.
Technical Specifications
| Technical Item | 1394C-AM03 / 1394C-AM50 |
|---|---|
| Brand | Allen-Bradley |
| Product Type | Servo amplifier axis module |
| Brand Country | United States |
| Product Family | 1394 Series C |
| Nominal DC Input | 530/680 V DC |
| Catalog Power Class | 1394C-AM03: 2 kW; 1394C-AM50: 10 kW class |
| Continuous Current | 3.0 A rms / 23.3 A rms |
| Peak Current | 6.0 A rms / 33.2 A rms for 1 second |
| Continuous Power at 360/460 V | 1.6/2 kW / 11.34/15.6 kW |
| Efficiency | 98% |
| Modulation Frequency | 5 kHz ±10% |
| Speed Regulation | 0–0.05% of base speed with 100% torque disturbance |
| Static Gain | 1.28 / 22.8 rms A/mV |
| Peak Current Limit Adjust | 200% / 143% |
| Drift | 0.03 rpm/°C |
| Capacitance | 110 µF / 465 µF |
| Weight | 5 kg / 7 kg |
| Motor Output | Controlled three-phase output for one axis |
Product Functions
DC-bus conversion
Each axis module switches the 530/680 V DC input into a controlled three-phase output for its connected motor.
Local servo regulation
Motor feedback is processed at the axis so the module can regulate velocity and current against the system command.
Axis protection signals
Motor thermal and brake-related leads are handled separately from the three-phase motor output and the DC-bus connection.
Operating Characteristics
The shared 5 kHz modulation and 98% efficiency of 1394C-AM03 / 1394C-AM50 do not make their motor-current or cooling requirements equivalent.
AM03 operating range
AM03 provides 3.0 A continuous and 6.0 A one-second peak current with a 200% peak-current-limit adjustment range.
AM50 operating range
AM50 provides 23.3 A continuous and 33.2 A one-second peak current with a 143% peak-current-limit adjustment range.
Thermal and physical difference
AM50 weighs about 7 kg and uses the high-power module cooling arrangement, while AM03 weighs about 5 kg and has a much smaller current stage.
Frequently Asked Questions
Regarding 1394C-AM03 / 1394C-AM50, why should AM50 not replace AM03 solely because it can deliver more current?
Regarding 1394C-AM03 / 1394C-AM50, A replacement must be an approved motor/system combination with suitable bus capacity, cable size, module order, feedback, cooling, and configured current limits. A larger current stage can exceed the motor or wiring boundary if it is installed without a complete system check.
Which axis-module connections must remain separate when AM03 or AM50 is wired for 1394C-AM03 / 1394C-AM50?
Keep the shared DC-bus input, controlled three-phase motor output, motor-feedback circuit, and motor thermal or brake leads on their assigned connections. The DC bus delivers energy to the module, while the feedback and thermal circuits return low-level sensing information and must not be treated as motor-power conductors. This distinction applies to 1394C-AM03 / 1394C-AM50.
Within 1394C-AM03 / 1394C-AM50, how different are the continuous and peak current limits?
Within 1394C-AM03 / 1394C-AM50, AM03 is rated 3.0 A continuous and 6.0 A peak for one second. AM50 is rated 23.3 A continuous and 33.2 A peak for one second, so its current and thermal boundary is substantially larger.
What should be checked if the motor runs roughly after an axis-module change within the 1394C-AM03 / 1394C-AM50 model group?
For 1394C-AM03 / 1394C-AM50, consider the following. Verify the exact motor/axis-module combination, feedback wiring and phasing, motor power phase order, configured motor data, and current-loop settings. A healthy DC bus alone does not confirm that the feedback and commutation paths are correct.
When working with 1394C-AM03 / 1394C-AM50, do AM03 and AM50 require the same physical cooling arrangement?
When 1394C-AM03 / 1394C-AM50 is involved, no. AM50 is the larger high-power module and its fan/cooling and placement requirements differ from AM03. Panel layout should use the exact module dimensions, weight, ventilation, and adjacency rules. Its added cooling hardware and fan service access must remain available after installation.
Is the motor feedback carried on the shared DC bus for equipment identified as 1394C-AM03 / 1394C-AM50?
No. The DC bus supplies power energy. Feedback is a separate sensing circuit that returns motor position information to the control loop, and it must be shielded and routed independently from the bus and motor conductors. This guidance covers 1394C-AM03 / 1394C-AM50
Shipping Services
Packing, carrier, dispatch and tracking coordination
Moore Automation organizes shipment handling around the confirmed order and destination, covering export packing, carrier coordination, dispatch communication and tracking updates.
Export packingProducts are packed for the recorded delivery route.
Carrier choiceRequested carrier arrangements can be coordinated.
Dispatch noticeShipment information is shared after handoff.
Tracking updatesAvailable tracking details follow the order record.
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