1756-A7 7 Slot ControlLogix Chassis Allen-Bradley

Allen-Bradley 1756-A7 ControlLogix Chassis

Technical Specifications

• Brand: Allen-Bradley
• Series: ControlLogix
• Model: 1756-A7
• Number of Slots: 7 module slots
• Backplane Current @ 5.1V DC: 15A/6A (chassis/slot)
• Backplane Current @ 24V DC: 2.8A/2.8A
• Backplane Current @ 3.3V DC: 4A/4A
• Backplane Current @ 1.2V DC: 1.5A/1.5A
• Power Dissipation: 4.5 Watts maximum

Chassis Configuration

• Slot Capacity: Seven total slots for comprehensive system design
• Mounting Tabs: Four secure mounting points (two top, two bottom)
• Power Supply Location: Dedicated left-side mounting position
• Module Compatibility: All ControlLogix processors and I/O modules
• Empty Slot Management: 1756-N2 filler modules required

Power Distribution System

• High Current Capacity: 15 amps maximum at 5.1V DC
• Per Slot Allocation: 6 amps maximum per slot at 5.1V DC
• Multiple Voltage Rails: Comprehensive 1.2V, 3.3V, 5.1V, 24V DC support
• Thermal Efficiency: 4.5W maximum power dissipation
• Cooling Performance: 6.1 BTU/hour thermal dissipation rate

Physical Dimensions & Installation

• Chassis Dimensions: 50.8 x 60.9 x 20.3 cm (20" x 24" x 8")
• Minimum Cabinet Size: 20" W x 24" H x 8" D requirement
• Weight Characteristics: Lightweight 1.1 kg design
• Mounting Flexibility: Standard panel mounting configuration
• Space Optimization: Compact footprint for medium capacity needs

Environmental Specifications

• Operating Temperature: 0°C to +60°C (32°F to 140°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Humidity Range: 5% to 95% non-condensing
• Vibration Resistance: 2G at 10-500 Hz operational
• Shock Rating: 30G operational, 50G non-operational

Electrical Installation Requirements

• Functional Earth Ground: 8.3 mm² (8 AWG) copper wire
• Protective Earth Ground: 2.1 mm² (14 AWG) copper wire
• Wire Specifications: 90°C (194°F) rated or higher
• Enclosure Type: Open-style for standard cabinet installation
• Grounding Compliance: Meets industrial safety standards

Frequently Asked Questions

What are the key benefits of the 7-slot chassis?

• The 1756-A7 provides optimal balance between compact size and expansion capability, making it ideal for medium-scale applications requiring multiple modules.

How many mounting points does this chassis have?

• It features four mounting tabs (two on top, two on bottom) for secure panel installation.

What power supply types are supported?

• The chassis accommodates slim, standard, and enhanced power supply models for flexible power options.

Can this chassis handle high-power modules?

• Yes, with 6A per slot at 5.1V DC, it can support power-intensive modules and processors.

For technical specifications and application support, contact our automation specialists at: sales@nex-auto.com