Allen Bradley 1756-A4 4 Slot ControlLogix Chassis

The AB 1756-A4 is a 4-slot ControlLogix chassis designed to house ControlLogix modules such as controllers, communication modules, and I/O. This chassis provides the physical structure and high-speed backplane necessary for module intercommunication in Rockwell Automation’s ControlLogix platform.

Built for industrial reliability, the 1756-A4 chassis is wall or panel-mountable and ideal for compact control systems where limited slots are sufficient. It supports high-performance applications in discrete, process, and motion control systems. A separate power supply is required for operation, offering modular flexibility in system design.

Technical Specifications

Model: 1756A4
Series: ControlLogix
Type: Chassis / Backplane
Number of Slots: 4
Integrated Power Supply: No (requires separate 1756-PA or 1756-PB series)
Backplane Type: ControlLogix high-speed
Mounting Type: Wall mount / Direct mount
Application: ControlLogix modular PLC systems, distributed control, motion, and process automation

Electrical & Interface Specifications

Backplane Power Distribution: Yes (via external power supply)
Voltage Compatibility: Via compatible 1756 series power supplies
Slot Compatibility: Supports all standard ControlLogix modules
Front Installation Support: Yes
Redundancy Support: Dependent on controller and power configuration

Mechanical Specifications

Width: 263 mm
Height: 169 mm
Depth: 145 mm
Mounting: Wall mount / Direct to panel (no DIN rail support)
Housing: Industrial-grade metal construction
Form Factor: Compact 4-slot layout
Weight: Approx. 1.8 kg

Environmental Specifications

IP Rating: IP20 (when installed in enclosure)
Operating Temperature: 0…60 °C
Storage Temperature: -40…85 °C
Relative Humidity: 5% to 95% non-condensing
Shock/Vibration Resistance: Compliant with IEC 60068
Certifications: CE, cULus, RoHS
Performance Level (ISO 13849-1): Level e
Category (EN 954-1): Category 4

Compliance & Communication

ControlNet / EtherNet/IP / DeviceNet Support: Enabled via installed communication modules
Chassis Type: Passive backplane
Bus Expansion Support: Yes (via bridges or remote racks)
Module Compatibility: All 1756 I/O, controllers, and communication modules
Redundant Power Supply Support: Yes, with appropriate supply configuration

Key Features & Benefits

✅ Compact 4-Slot Design: Ideal for smaller systems or localized control

✅ Supports All ControlLogix Modules: Universal slot compatibility

✅ Backplane Communication: High-speed inter-module data sharing

✅ Flexible Power Options: No integrated PSU for customizable supply configuration

✅ Panel-Mountable: Suitable for control cabinets with direct mounting

✅ Standards Compliant: Meets SIL Level e and EN 954-1 Category 4 safety performance

📦 Order the Allen Bradley 1756-A4 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1756-A4 prices. With 2 units currently in stock, we provide fast dispatch and full technical support for your ControlLogix system builds and expansions.

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