Allen-Bradley 1746-A10 Chassis Module

The Allen-Bradley 1746-A10 is a 10-slot chassis module designed for the SLC 500 automation platform. From an engineer’s standpoint, this chassis is the structural backbone of an SLC system—supplying mechanical support, power distribution paths, and backplane signal integrity for CPU modules, I/O cards, and communication interfaces. In field deployments, the 1746-A10 is known for robust build quality, stable backplane performance and long-term reliability in demanding industrial environments.

Technical Specifications

Applications

• Medium-scale SLC 500 automation systems requiring multiple I/O and communication modules

• Machine control applications with distributed I/O and local high-density signals

• Legacy system expansions where SLC 500 chassis remain in operation

• Process control panels with mixed digital, analog, and specialty modules

• Production equipment upgrades needing established SLC backplane stability

Advantages

• Room for system expansion with 10 available slots, ideal for mid-sized automation systems

• Stable backplane operation, ensuring reliable module communication and low signal noise

• Mechanical rigidity designed to withstand cabinet vibration and long-term service

• Flexible power supply options, allowing integration with several SLC power units

• Straightforward maintenance, thanks to accessible layout and modular design

• Excellent compatibility, supporting the entire SLC 500 module ecosystem

FAQs

1. How many modules can the 1746-A10 support?

   – Up to 10 modules of any SLC 500 type (CPU, I/O, communication, specialty).

2. Does the chassis include a power supply?

   – No, it requires an external SLC 500 power supply such as 1746-P2 or 1746-P4.

3. Are all 10 slots usable with any module?

   – Yes, though the CPU is typically installed on the leftmost slot.

4. What type of backplane connector does it use?

   – Standard SLC 500 backplane with keyed card-edge connectors.

5. Is the chassis suitable for harsh environments?

   – It is designed for industrial cabinets but not direct outdoor exposure.

6. Can analog and digital modules be mixed?

   – Yes, the chassis is fully mixed-module capable.

7. What is the typical power consumption of the backplane?

   – Determined by the installed modules and the selected power supply.

8. Does the 1746-A10 support remote chassis operation?

   – Yes, when paired with communication adapters like 1747-ASB.

9. Is special cooling required?

   – Normal cabinet convection cooling is typically adequate.

10. Are the slots hot-swappable?

    – No, power must be removed before adding or removing modules.