Product Details
Product Overview
The Allen-Bradley 1746-A7 is a 7-slot modular chassis from the SLC 500 series, designed to house and interconnect processors, power supplies, and I/O modules in industrial automation systems. With support for up to seven modules, this chassis ensures reliable backplane communication and clean power distribution across all installed components. It can be expanded through interconnection cables to support larger configurations, offering flexibility for scalable control system designs. Constructed for panel mounting, the 1746-A7 provides dependable performance in both new and retrofit applications.
Technical Specifications
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Manufacturer: Rockwell Automation
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Brand: Allen-Bradley
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Model Number: 1746-A7
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Series: SLC 500
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Product Type: Modular I/O Chassis
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Slots: 7 slots for modular components
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Expansion Capacity: Up to 21 total modules using interconnection cables (1746-C7, 1746-C9)
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Dimensions (W x H x D): 28.2 × 17.1 × 14.5 cm (11.1 × 6.7 × 5.7 in)
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Approximate Weight: 1.1 kg (2.4 lb)
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Mounting Type: Panel mount with 4 tabs
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Backplane Current:
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5.1 VDC @ 10 A
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24 VDC @ 2.88 A
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Thermal Dissipation: 2.5 BTU/hour at 28.8 VDC
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Operating Temperature: 0°C to +60°C (32°F to 140°F)
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Storage Temperature: -40°C to +85°C (-40°F to 185°F)
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Relative Humidity: 5%–95% (non-condensing)
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Chassis Material: Aluminum with integrated grounding
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Condition: New & Original in factory packaging
Application Scenarios
The Allen-Bradley 1746-A7 chassis is widely used in:
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Distributed and modular control systems using the SLC 500 platform
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Factory automation, packaging lines, and process monitoring systems
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Equipment requiring mid-sized modular expansion capability
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System retrofits where space and scalability are critical
FAQ
Q: What types of modules can be installed in the 1746-A7 chassis?
A: It supports all standard SLC 500 I/O, communication, processor, and specialty modules.
Q: Can this chassis be expanded to accommodate additional modules?
A: Yes, up to three chassis (21 total modules) can be interconnected using 1746-C7 or 1746-C9 cables.
Q: Which power supplies are compatible with this model?
A: Compatible with Allen-Bradley 1746-P1, 1746-P2, and 1746-P4 power supplies.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Why Programmable Logic Controllers Drop into Stop Mode: An Expert Analysis
Industrial automation systems rely heavily on Programmable Logic Controllers (PLCs) to maintain uninterrupted production. When a PLC unexpectedly shifts from Run to Stop mode, whole manufacturing lines stall.
As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.