Compact Modular Chassis Solution for SLC 500 Control Systems
The Allen Bradley 1746-A7 7 Slot Rack is a reliable modular chassis designed for the SLC 500 automation platform. Engineered to house processors, power supplies, communication modules, and I/O modules within a centralized architecture, this rack provides a stable and scalable foundation for industrial control systems.
With its compact seven-slot configuration, the 1746-A7 is ideal for medium-sized automation applications that require flexible module expansion while maintaining efficient cabinet space utilization. The chassis incorporates an integrated backplane communication system that enables dependable data transfer between installed SLC 500 modules.
Widely used across manufacturing and process industries, the 1746-A7 offers long-term durability, simplified maintenance access, and proven compatibility with legacy and existing Allen Bradley SLC automation infrastructures.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Allen Bradley |
| Product Family | SLC 500 |
| Model Number | 1746-A7 |
| Module Type | 7-Slot Rack / Chassis |
| Number of Slots | 7 |
| Compatible Controllers | SLC 500 Series |
| Backplane Current Capacity | 10A @ 5V DC |
| Communication Method | Integrated chassis backplane |
| Mounting Type | Panel mount |
| Slot Arrangement | 1 power supply slot + 6 module slots |
| Chassis Material | Industrial-grade metal |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5–95% non-condensing |
| Shock Resistance | Industrial-rated |
| Vibration Resistance | Industrial-rated |
| Dimensions | Approx. 305 mm × 145 mm × 140 mm |
| Weight | Approx. 2.0–2.8 kg |
Applications
The 1746-A7 rack is widely used in industrial automation systems requiring modular SLC 500 control integration with moderate I/O expansion capability.
Typical applications include:
-
Manufacturing production equipment
-
Packaging machinery
-
Conveyor and material handling systems
-
Water and wastewater facilities
-
Industrial process automation
-
OEM machine control systems
-
Legacy automation upgrades
-
Factory control cabinets
Its compact footprint makes it especially suitable for installations with limited cabinet space while still requiring multiple control and I/O modules.
Advantages
Compact Space-Saving Design
The seven-slot architecture provides flexible expansion while minimizing panel footprint requirements.
Reliable Backplane Performance
Integrated chassis communication supports stable processor and I/O data exchange.
Flexible Modular Integration
Supports a broad range of SLC 500 processors, analog modules, digital I/O, and communication cards.
Industrial Durability
Designed for long-term performance in harsh manufacturing and industrial environments.
Easy Maintenance Access
Open modular structure allows quick installation, replacement, and troubleshooting of system modules.
Proven Legacy System Compatibility
Maintains compatibility with widely installed SLC 500 automation systems used globally.
Technical FAQs
1. What is the main function of the 1746-A7 rack?
It serves as a modular chassis for housing SLC 500 automation modules.
2. How many slots are available?
The chassis includes a total of 7 slots.
3. What systems is it compatible with?
It is designed for Allen Bradley SLC 500 controllers and I/O modules.
4. Can it support communication modules?
Yes. Communication modules can be installed alongside processors and I/O modules.
5. Does the rack include a power supply?
No. A compatible SLC 500 power supply must be installed separately.
6. What mounting style does it use?
The rack is designed for panel-mounted installation inside industrial cabinets.
7. Is it suitable for compact automation systems?
Yes. Its smaller footprint makes it ideal for medium-sized and space-limited systems.
8. What industries commonly use the 1746-A7?
Manufacturing, packaging, water treatment, logistics, and industrial processing industries commonly use it.
9. Does the chassis include integrated communication?
Yes. It includes an integrated backplane communication system for module interaction.
10. Why is the 1746-A7 still used today?
Many industrial facilities continue operating reliable SLC 500 systems due to their long service life and proven performance.
A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
