Description
Description
The Allen-Bradley 1746-A7 is a robust 7-slot modular chassis specifically engineered for the SLC 500 programmable controller system. This chassis provides a reliable backplane for mounting the controller processor, power supply, and various I/O or specialty modules. It is ideal for mid-sized automation applications where a compact footprint is required while maintaining sufficient capacity for system expansion and diverse module integration.
Features
- Seven-slot capacity for flexible I/O and processor configuration.
- Slot 0 reserved for the SLC 500 processor or remote I/O adapter.
- Supports local expansion by linking up to two additional chassis units.
- Compatible with 1746-C series interconnect cables for backplane communication.
- Integrated backplane for high-speed data transfer between modules.
- Panel-mount design with four secure mounting tabs for vibration-resistant installation.
Applications
This chassis is a fundamental component for Allen-Bradley SLC 500 control systems, widely utilized in industrial manufacturing, process control, and machine automation environments. It serves as the physical backbone for distributed or standalone control architectures requiring scalable I/O density.
Technical Specifications
| Brand |
Allen-Bradley |
| Product Series |
SLC 500 |
| Slot Count |
7 |
| Backplane Current (5.1V DC) |
10 A |
| Backplane Current (24V DC) |
2.88 A |
| Mounting |
Panel Mount |
| Operating Temperature |
0 to 60 degC |
| Storage Temperature |
-40 to 85 degC |
| Relative Humidity |
5 to 95% (Non-condensing) |
| Weight |
1.22 kg |
Installation Guidelines
- Ensure the mounting surface is flat and capable of supporting the weight of the chassis and all installed modules.
- Use appropriate SEM or Phillips screws with star washers to secure the chassis via the four mounting tabs.
- Always disconnect power from the chassis before installing or removing any modules to prevent electrical damage.
- Maintain adequate clearance around the chassis to ensure proper airflow and cooling, adhering to the specified operating temperature range.
- When using multiple chassis, ensure the 1746-C series cables are securely seated to maintain backplane communication integrity.
- Ensure proper grounding of the chassis to a low-impedance ground point to minimize EMI susceptibility.
FAQ
Can I use this chassis with any SLC 500 processor?
Yes, the 1746-A7 is designed for the SLC 500 series and supports standard processors and remote I/O adapters in the designated Slot 0.
How many total slots are available for I/O modules?
The chassis has 7 total slots; Slot 0 is dedicated to the processor or adapter, leaving 6 slots available for I/O and specialty modules.
Is it possible to expand this system?
Yes, you can connect this chassis to up to two additional 1746 chassis using the 1746-C series interconnect cables.
