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Description：

The 1746-A7 model is a critical mounting chassis utilized in the SLC 500 series  . This chassis provides an efficient framework for accommodating up to seven slots, allowing for versatile configuration options in industrial setups. To ensure stable installation, this chassis incorporates four mounting tabs, suitable for panel mounting.

When it comes to power specifications, the chassis can manage a maximum backplane current of 10 Amps at 5.1V DC and 2.88 Amps at 24V DC. You may connect it to two other chassis, enhancing the overall system capacity. Optional interconnect cables can be utilized for linking multiple chassis together, facilitating expanded functionality.

Specification：

Frequently asked questions

What is the backplane current capacity of the 1746-A7?
It supports a maximum electronic load of 10 A at 5.1V DC and 2.88 A at 24V DC. You must sum up the power consumption of all inserted modules to ensure they do not exceed these limits.

Can a short-circuit on a field sensor destroy the 1746-A7?
Usually, a field short-circuit only damages the specific I/O module channel. However, if the module lacks internal isolation, the surge can burn out the local backplane traces on the chassis.

What is the maximum distance between two linked 1746 chassis?
The total combined length of all interconnect cables in a single local PLC system cannot exceed 3 feet (0.9 meters) due to high-speed backplane data constraints.

Can I link multiple 1746-A7 chassis together if I run out of slots?
Yes. You can connect up to three chassis together using 1746-C7, C9, or C11 chassis interconnect cables to expand your system up to a maximum of 30 slots.

Product Applications

Automotive Manufacturing: Used for sequential control and motion management in body shops and parts processing lines.
Power and Energy: Serves as a local controller in substation auxiliary systems, power plants, or new energy facilities.
Water Treatment and Environmental Protection: Performs process control for pump stations, valve switching, and water quality monitoring.
Metallurgy and Building Materials Plants: Handles harsh industrial environments such as ore conveying, blast furnace fan control, and cement mixing and batching systems.