AB 1756-A4 ControlLogix Chassis

The Allen-Bradley 1756-A4 is a ControlLogix Chassis, specifically a 4-slot chassis, designed for use with ControlLogix modules within an industrial automation system. It serves as the backplane for ControlLogix controllers, I/O modules, and communication modules, allowing them to communicate and receive power.

Here's a detailed description of its features and specifications:

Product Overview:

• Manufacturer: Allen-Bradley (a brand of Rockwell Automation)

• Series: ControlLogix 1756

• Type: Chassis / Mounting Rack

• Function: Provides the physical and electrical backplane for ControlLogix modules, enabling communication and power distribution among them.

Key Features:

• 4 Slots: This chassis provides four physical slots where various ControlLogix modules (e.g., CPU, digital I/O, analog I/O, communication modules) can be inserted and securely connected.

• Backplane Communication: Facilitates high-speed communication between the installed modules via the backplane, crucial for real-time control applications.

• Power Distribution: Distributes power from a ControlLogix power supply (e.g., 1756-PA72, 1756-PB72, etc.) to all inserted modules.

• Modular Design: Part of the modular ControlLogix system, allowing users to customize their control solutions by selecting and arranging various modules as needed.

• Robust Construction: Designed for industrial environments, ensuring reliable operation in demanding conditions.

Typical Applications:The 1756-A4 chassis is an integral component in various industrial automation applications, including:

• Process control systems

• Discrete manufacturing

• Machine control

• Factory automation

• Building automation

Specifications (General):

• Number of Slots: 4

• Mounting: Sub-panel, horizontal only

• Enclosure Type: None (Open-Style)

• Dimensions (Approximate):

• Width: 262.6 mm (10.34 in)

• Height: 158 mm (6.22 in)

• Depth: 145 mm (5.71 in)

• Weight (Approximate): 0.75 kg (1.7 lb)

• Environmental Specifications:

• Operating Temperature: 0...60 °C (32...140 °F)

• Non-Operating Temperature: -40...85 °C (-40...185 °F)

• Relative Humidity: 5...95% non-condensing

• Vibration (Operating): 2 g @ 10...500 Hz

• Shock (Operating): 30 g

• Shock (Non-Operating): 50 g

• Certifications: Typically meets various industrial standards (e.g., c-UL-us, CE, KC, RCM) for safety and electromagnetic compatibility. (Specific certifications may vary by series/revision.)

Note: Always refer to the official Rockwell Automation documentation and datasheets for the most accurate and up-to-date specifications for the specific revision of the 1756-A4 chassis you are working with.

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