1756-A4K | Allen-Bradley | 4-Slot Conformal Coated PLC Rack
Manufacturer: Allen Bradley
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Part Number: 1756-A4K
Condition：New with Original Package
Product Type: 4-Slot Backplane Chassis
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1756-A4K ControlLogix 4-Slot Conformal Coated Chassis
Product Overview
The Allen-Bradley 1756-A4K is a compact, 4-slot ControlLogix® chassis engineered for high-performance automation in space-constrained and harsh environments. The "K" designation specifies that this chassis is conformal coated, providing a specialized protective layer over the internal backplane electronics to shield against moisture, salt spray, and corrosive chemical contaminants.
This chassis serves as the physical and communication backbone for smaller ControlLogix systems. It enables seamless, high-speed data exchange between controllers, network bridges, and I/O modules via its deterministic serial backplane. Its small footprint makes it an ideal choice for localized machine control or as a rugged remote I/O node in distributed architectures where reliability in aggressive atmospheres is non-negotiable.
Technical Specifications
Detailed hardware data and backplane electrical limits for the 1756-A4K:
| Parameter | Specification Details |
| Model Number | 1756-A4K |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Type | 4-Slot Chassis (Conformal Coated) |
| Environmental Protection | Conformal Coating (K Series) |
| Backplane Current (1.2V DC) | 1.5 A |
| Backplane Current (3.3V DC) | 4.0 A Total / 4.0 A per Slot |
| Backplane Current (5.1V DC) | 15 A Total / 6 A per Slot |
| Backplane Current (24V DC) | 2.8 A Total / 2.8 A per Slot |
| Module Capacity | 4 Slots |
| Dimensions (WxHxD) | 262 x 169 x 145 mm (10.32 x 6.65 x 5.71 in) |
| Operating Temperature | 0 °C to +60 °C (32 °F to 140 °F) |
| Storage Temperature | -40 °C to +85 °C (-40 °F to +185 °F) |
| Mounting | Horizontal Panel Mount |
| Weight | 1.1 kg (2.4 lbs) |
| Certifications | CE, UL, cUL, ATEX, IECEx |