1756-A17 ControlLogix Chassis Allen-Bradley

Allen-Bradley 1756-A17 ControlLogix Chassis

Chassis Configuration & Mounting

• Maximum Slot Capacity: Seventeen total slots for extensive system expansion
• Mounting Security: Ten mounting tabs (five top, five bottom) for robust installation
• Power Supply Integration: Dedicated left-side mounting area separate from main slots
• Series Options: Available in Series A, B, and C with progressive improvements
• Series C Enhancements: Improved slot guides, ventilation, and additional grounding

Power Distribution System

• High-Capacity Backplane: 15 amps maximum at 5.1V DC for power-intensive modules
• Per-Slot Power: 6 amps maximum per slot at 5.1V DC allocation
• Comprehensive Voltage Support: 1.2V, 3.3V, 5.1V, and 24V DC distribution rails
• Thermal Management: 6W maximum power dissipation with optimized cooling
• Efficient Operation: 1.8W typical power consumption during normal operation

Physical Dimensions & Space Requirements

• Chassis Dimensions: 738 x 169 x 145 mm (29.06" x 6.65" x 5.71")
• Minimum Cabinet Size: 914 x 762 x 203 mm (36" x 30" x 8")
• Adjacent Chassis Clearance: 4.0" left side plus power supply width
• Right Side Clearance: 3.0" plus power supply width for maintenance access
• Vertical Clearance: 6.0" top and 2.0" bottom for proper ventilation

Advanced System Features

• Sequence of Event Timestamping: Built-in capabilities for critical event recording
• RIUP Support: Full Removal and Insertion Under Power functionality
• Electronic Keying: Prevents module installation and replacement errors
• Comprehensive Diagnostics: Advanced fault identification for system and field side issues
• High-Speed Communication: Optimized backplane for fast inter-module data exchange

Installation & Electrical Requirements

• Functional Earth Ground: 8.3 mm² (8 AWG) copper wire minimum
• Protective Earth Ground: 2.1 mm² (14 AWG) copper wire minimum
• Wire Specifications: 90°C (194°F) rated or higher insulation required
• Mounting Hardware: Compatible with or without SEM screws installation
• Wiring Interface: Requires Bulletin 1492 IFM or RTB for field-side connections

Compatible Power Supplies

• Standard Models: 1756-PA72, 1756-PB72
• Enhanced Models: 1756-PA75, 1756-PB75, 1756-PC75
• Specialized Models: 1756-PH75 for specific high-performance applications
• Selection Criteria: Based on total module power requirements and system redundancy needs

Application Scenarios

• Large Process Plants: Refineries, chemical processing, and power generation
• Complex Manufacturing: Automotive plants and large discrete manufacturing
• Infrastructure Systems: Water treatment facilities and transportation systems
• Mission-Critical Applications: Systems requiring maximum redundancy and reliability
• Expansion Projects: Growing automation systems requiring extensive I/O capacity

Frequently Asked Questions

What makes the 1756-A17 suitable for large-scale applications?

• The 1756-A17 provides maximum expansion capacity with 17 slots, making it ideal for complex systems requiring multiple processors, extensive I/O, and specialized communication modules.

What are the Sequence of Event capabilities?

• Built-in timestamping functionality allows precise recording of event sequences for critical process monitoring and troubleshooting.

How many mounting points does this large chassis have?

• It features ten mounting tabs (five top, five bottom) for secure installation of the extended chassis length.

What clearance is needed between adjacent chassis?

• Allow 4.0" plus power supply width on left side and 3.0" plus power supply width on right side for proper maintenance access.

What diagnostic features are included?

• Comprehensive diagnostics identify both system and field-side faults, while electronic keying prevents module installation errors.

What are the Series C improvements?

• Enhanced slot guides, improved ventilation, reinforced mounting tabs, additional mounting holes, and extra ground screw for panel termination.

What cabinet size is required?

• Minimum 36" W x 30" H x 8" D cabinet space is needed to accommodate the chassis and provide proper maintenance access.

For technical specifications and large system planning assistance, contact our automation experts at: sales@nex-auto.com