Description
The Allen-Bradley 1756-A17 is a standard 17-slot chassis designed to serve as the backbone for ControlLogix control systems. This open-style enclosure provides the necessary backplane communication and power distribution required to integrate a wide array of I/O, communication, and controller modules within an industrial rack environment.
Features
- 17-slot capacity for high-density system configurations.
- Integrated backplane for high-speed data exchange and power distribution between modules.
- Supports RIUP (Removable Insertion Under Power) for maintenance without system downtime.
- Electronic keying capabilities to prevent the installation of incorrect modules.
- Built-in SOE (Sequence of Events) timestamping support for precise process monitoring.
Applications
- Automated vehicle assembly and manufacturing lines.
- Centralized control for municipal water and sewage treatment facilities.
- Large-scale logistics and warehousing sorting systems.
- Integrated food and beverage processing control stations.
Technical Specifications
| Model |
1756-A17 |
| Slots |
17 |
| Enclosure Type |
Open |
| Backplane Current (5V DC) |
10 A |
| Backplane Current (24V DC) |
2.8 A |
| Power Dissipation (Max) |
6 W |
| Operating Temperature |
0 to 60 degC (32 to 140 degF) |
| Mounting |
Horizontal panel mount |
Installation Guidelines
- Ensure the chassis is mounted horizontally using the 10 integrated mounting tabs (5 top, 5 bottom).
- Maintain required clearances: 10.2 cm plus power supply width on the left, 7.7 cm plus power supply width on the right, 15.3 cm top clearance, and 5.1 cm bottom clearance.
- Proper grounding is mandatory: Utilize a Functional Earth (8.3 mm² / 8 AWG) and Protective Earth (2.1 mm² / 14 AWG) connection to ensure noise immunity and electrical safety.
- The chassis is compatible with both standard and SEM screw mounting configurations; verify hardware requirements based on your specific assembly.
- This unit does not feature a conformal coating; install only in controlled environments free from excessive moisture or corrosive contaminants.
FAQ
What is the primary function of the 1756-A17 chassis?
The 1756-A17 acts as the physical mounting rack and communication backplane for the Allen-Bradley ControlLogix platform, supplying power and data pathways to all installed modules.
Is this chassis compatible with hot-swapping?
Yes, the ControlLogix architecture supports RIUP (Removable Insertion Under Power), allowing modules to be serviced while the chassis remains powered.
Can I mount this chassis vertically?
No, the 1756-A17 is designed strictly for horizontal mounting configurations to ensure proper heat dissipation and module seating.
What are the grounding requirements?
The chassis requires dedicated Functional Earth and Protective Earth connections to maintain system integrity and minimize electrical noise interference.
