Allen-Bradley 1394-SJT10-A System Module Power Supply

Allen-Bradley 1394-SJT10-A System Module Power Supply

The Allen-Bradley 1394-SJT10-A is a high-performance system module power supply engineered for the 1394 TurboAxis digital servo drive platform. Delivering 8 kW continuous power with 10 kW rated capacity and 28 kW peak output, this robust power module provides the energy backbone for demanding multi-axis motion control applications in industrial automation.

Technical Specifications

• Catalog Number: 1394-SJT10-A
• Continuous Power Output: 8 kW
• Rated Power Output: 10 kW
• Peak Power Output: 28 kW (for 2 seconds)
• Input Voltage: 230V AC or 460V AC (3-phase, 50/60 Hz)
• Input Current: 25A at 230V AC, 12.5A at 460V AC (at rated power)
• DC Bus Voltage: 325V DC (230V input), 650V DC (460V input)
• Efficiency: >95% at rated load
• Power Factor: >0.95 with integrated active front end
• Overload Capacity: 150% for 60 seconds, 200% for 5 seconds
• Regenerative Capability: Full 4-quadrant operation with energy recovery
• Operating Temperature: 0°C to 50°C (32°F to 122°F) without derating
• Storage Temperature: -25°C to 70°C (-13°F to 158°F)
• Humidity: 5% to 95% non-condensing
• Cooling: Forced air convection with integrated fans
• Dimensions: 305 mm H × 152 mm W × 305 mm D (12" × 6" × 12")
• Weight: 11 kg (24.3 lbs)
• Mounting: Vertical panel mount or chassis installation

Advanced Power Architecture

The 1394-SJT10-A incorporates cutting-edge power conversion technology optimized for servo drive applications:

• Active Front End (AFE): IGBT-based rectifier actively controls input current waveform, achieving >95% power factor and minimizing harmonic distortion to <5% THD
• Regenerative Braking: Captures kinetic energy during deceleration and returns it to the AC supply, reducing energy consumption by 20-40% in cyclic applications
• Common DC Bus: Shares DC bus voltage across multiple axis modules, enabling energy transfer between accelerating and decelerating axes for maximum efficiency
• Dynamic Braking: Integrated chopper circuit with external resistor connection for applications where regeneration to AC line is not permitted
• Soft Start: Controlled inrush current limiting prevents nuisance breaker trips during power-up

Application Scenarios

The 1394-SJT10-A power module excels in high-performance motion control applications:

• CNC Machine Tools: Power multi-axis machining centers, lathes, and grinding machines requiring precise coordinated motion with rapid acceleration/deceleration cycles
• Packaging Machinery: Drive high-speed pick-and-place systems, cartoners, and case packers with repetitive motion profiles that benefit from regenerative energy recovery
• Material Handling: Control automated storage/retrieval systems (AS/RS), gantry robots, and conveyor positioning systems with frequent start/stop operations
• Printing Presses: Synchronize multiple print stations in flexographic, gravure, and digital printing equipment requiring tight registration control
• Textile Machinery: Power weaving looms, knitting machines, and fiber processing equipment with complex multi-axis coordination
• Semiconductor Manufacturing: Drive wafer handling robots, die bonders, and wire bonders in cleanroom environments requiring ultra-precise positioning

System Integration & Configuration

The 1394-SJT10-A integrates seamlessly with the 1394 TurboAxis ecosystem:

• Axis Module Compatibility: Powers up to 4 axis modules (1394-AM series) via common DC bus connection
• Mixed Axis Sizing: Combine different axis module ratings (1-75A) on single power supply for optimized system cost
• Parallel Operation: Connect multiple SJT modules in parallel for systems exceeding 10 kW total power requirement
• Network Integration: Communicates via DeviceNet, ControlNet, or Remote I/O for coordinated motion control
• Programming Tools: Configure and commission using RSLogix 5000 or MotionView software with intuitive setup wizards

Energy Efficiency Benefits

Deploying the 1394-SJT10-A delivers measurable energy savings:

• Regenerative Savings: Recover 20-40% of braking energy in typical cyclic applications, reducing annual electricity costs by $2,000-$5,000 per axis
• High Efficiency: >95% conversion efficiency minimizes heat generation and cooling requirements
• Power Factor Correction: >0.95 power factor eliminates utility penalties and reduces transformer/conductor sizing requirements
• Harmonic Mitigation: <5% THD eliminates need for expensive harmonic filters and improves power quality for other equipment
• Energy Monitoring: Built-in power metering tracks consumption for ISO 50001 energy management compliance

Installation Guidelines

Proper installation ensures optimal performance and longevity:

• Clearances: Maintain 150 mm (6") top/bottom clearance for airflow; 50 mm (2") side clearance for service access
• Ambient Temperature: Install in environment not exceeding 40°C (104°F); derate 2.5% per °C above 40°C
• Input Wiring: Use 10 AWG (6 mm²) copper conductors for 230V input, 14 AWG (2.5 mm²) for 460V input; torque terminals to 1.7 N⋅m (15 lb⋅in)
• DC Bus Wiring: Use shielded cable for DC bus connections to axis modules; maximum bus length 15 meters (50 feet)
• Grounding: Connect chassis ground to earth ground with <0.1Ω resistance using 10 AWG (6 mm²) minimum wire
• Dynamic Brake Resistor: Size external resistor for 10% duty cycle at peak power; use Allen-Bradley catalog resistors for guaranteed compatibility

Diagnostic & Protection Features

The 1394-SJT10-A provides comprehensive fault detection and protection:

• Input Phase Loss: Detects missing input phase and initiates controlled shutdown to prevent single-phasing damage
• DC Bus Overvoltage: Activates dynamic brake chopper when bus voltage exceeds safe threshold during regeneration
• DC Bus Undervoltage: Monitors for input power sag or loss; provides ride-through for momentary disturbances
• Overtemperature Protection: Thermal sensors monitor heatsink temperature; derate output or shutdown if limits exceeded
• Ground Fault Detection: Identifies insulation breakdown in motor or cable; trips to prevent equipment damage
• LED Diagnostics: Multi-color status indicators provide at-a-glance health monitoring; fault codes displayed via 7-segment display

Compliance & Certifications

The 1394-SJT10-A meets rigorous international standards:

• Safety: UL 508C Listed, CSA C22.2 No. 14, CE marked per Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU
• EMC: EN 61800-3 Category C3 (industrial environment), FCC Part 15 Class A
• Harmonics: IEC 61000-3-2 compliant (active front end eliminates harmonic issues)
• Marine: DNV GL Type Approved for shipboard servo drive systems
• Environmental: RoHS compliant, REACH registered, conflict minerals compliant

Maintenance & Service Life

Recommended practices for maximum uptime:

• Fan Inspection: Quarterly inspection of cooling fans; replace if bearing noise or reduced airflow detected
• Capacitor Replacement: DC bus capacitors have 10-year service life at 40°C ambient; plan replacement at 8-year interval for critical applications
• Thermal Imaging: Annual infrared scan of power terminals and bus connections to detect high-resistance joints
• Firmware Updates: Check Rockwell Automation website quarterly for firmware enhancements and bug fixes
• Spare Parts Strategy: Stock one spare module for every 10 installed units in critical production lines

Related Products

© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191

Download PDF file here: