Description
Allen Bradley 1746-A4 Drive Chassis Board Module
What sets the Allen Bradley 1746-A4 apart is its balance of size and functionality: it fits up to four SLC 500 modules (e.g., a controller, input module, output module, and power supply) while occupying just 152mm (6 inches) of width—ideal for tight control cabinets or machine-mounted enclosures. Its integrated backplane ensures reliable communication between modules, eliminating the need for external wiring between components and reducing points of failure. Whether deployed in a standalone small machine or as a distributed I/O node in a larger SCADA system, the Allen Bradley 1746-A4 provides a durable, scalable foundation for industrial automation.
| Label | Specification |
|---|---|
| Model Number | 1746-A4 |
| Brand | Allen Bradley (Rockwell Automation) |
| Type | SLC 500 4-Slot Modular Chassis |
| Number of Slots | 4 (compatible with all SLC 500 modules) |
| Backplane Voltage | 5V DC (powered by external supply) |
| Operating Temp | -10°C to 55°C (14°F to 131°F) |
| Mounting Options | Wall-Mount, DIN Rail (with adapter), or Panel-Mount |
| Weight | 1.13 kg (2.5 lbs) |
| Certifications | UL, CSA, CE, Class I Division 2 |
| Dimensions | 152.4 × 228.6 × 101.6 mm (6 × 9 × 4 in) |
| Material | Powder-Coated Aluminum Housing |
| Backplane Communication | Parallel Backplane (for SLC 500 module data transfer) |
| Max Module Depth | 101.6 mm (4 in) (compatible with standard SLC 500 modules) |
| Ventilation | Passive (via side vents) |
1746-A4
The Allen Bradley 1746-A4 excels in industrial environments due to its rugged construction and user-centric design. Its powder-coated aluminum housing resists corrosion, scratches, and impact—critical for machine-mounted enclosures where the chassis may be exposed to debris or minor collisions. The 4-slot layout is optimized for balanced component pairing: a typical setup might include one 1747-L511 controller, one 1746-IB16 input module, one 1746-OB16 output module, and one 1746-P1 power supply—all fitting neatly within the chassis without overcrowding.
Compatible and Related Models
- Allen Bradley 1747-L511: SLC 500 5/01 controller (2K memory) that fits in the 1746-A4, ideal for basic logic control in small systems.
- Allen Bradley 1746-P1: 120V AC power supply that mounts in the 1746-A4, providing 5V DC backplane power to connected modules.
- Allen Bradley 1746-IB16: 16-point digital input module for the 1746-A4, collecting data from limit switches and proximity sensors.
- Allen Bradley 1746-OB16: 16-point solid-state output module that pairs with the 1746-A4, controlling solenoids and indicator lights.
- Allen Bradley 1746-TB3: Terminal block extender for modules in the 1746-A4, simplifying wiring in tight chassis spaces.
- Allen Bradley 1746-IF8: 8-channel analog input module that fits in the 1746-A4, monitoring temperature or pressure for process control.
- Allen Bradley 1746-DH485: Communication module for the 1746-A4, enabling data transfer between multiple SLC 500 chassis.
- Allen Bradley RSLogix 500: Programming software used to configure modules mounted in the 1746-A4, including controller logic and I/O mapping.
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