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The Allen-Bradley 1756-A4 is a compact, 4-slot chassis designed for the ControlLogix platform. This chassis provides the necessary backplane communication and power distribution for ControlLogix modules, including processors, I/O modules, and communication adapters. It is engineered for industrial environments and supports horizontal mounting configurations.
| Model | 1756-A4 |
| Slot Count | 4 |
| Mounting | Horizontal |
| Backplane Current (5V DC) | 10 A |
| Backplane Current (24V DC) | 2.8 A |
| Power Dissipation (Max) | 4 W |
| Enclosure Type | Open |
The 1756-A4 serves as the physical mounting and electrical backplane for Allen-Bradley ControlLogix modules, allowing them to communicate with the processor and receive power.
The 1756-A4 is specifically designed for horizontal mounting. Refer to the official Allen-Bradley ControlLogix installation manual for specific thermal and orientation requirements if alternative mounting is considered.
The chassis itself does not consume power, but it distributes power from a ControlLogix power supply to the modules. It supports a backplane current of 10A at 5V DC and 2.8A at 24V DC.