Allen‑Bradley 1756‑A7 – ControlLogix Chassis

Specifications

• Total Slots: 7 slots (far-left slot dedicated to power supply module)
• Mounting: Horizontal panel mount only, with 4 mounting tabs (2 top / 2 bottom)
• Backplane Current Ratings
  • 1.2 VDC: 1.5 A chassis max
  • 3.3 VDC: 4 A per slot
  • 5.1 VDC: 15 A chassis max, 6 A per slot
  • 24 VDC: 2.8 A chassis & per slot
• Max Power Dissipation: 4.5 W
• Mechanical Dimensions (H×W×D): 50.8 × 609.6 × 203 mm (20 × 24 × 8 in)
• Weight: Approx. 1.1 kg (2.4 lb)
• Operating Temperature: 0 °C to +60 °C; Storage: -40 °C to +85 °C
• Humidity: 5%–95% RH, non‑condensing
• Construction: Aluminum frame, open‑style IP20 housing
• Cooling: Natural convection
• Compatible Modules: All ControlLogix CPU, I/O, communication, specialty modules
• Certifications: UL, cULus, CE, EAC

Key Features

• Integrated high‑speed backplane bus for fast inter‑module communication
• Standardized slot interface supporting standard, slim and specialty modules
• Dedicated power supply slot for easy installation of 1756 series AC/DC power supplies
• Integrated functional & protective grounding terminals to suppress EMI interference
• Sturdy aluminum structure for excellent heat dissipation and vibration resistance
• Compact 7‑slot design for mid‑size control systems, flexible configuration
• Simple open housing for convenient module installation, replacement and maintenance

Applications

• Mid‑size industrial PAC control systems for manufacturing, packaging, automotive
• Process control, material handling, conveyor and machine tool automation
• Distributed I/O expansion paired with ControlLogix controllers
• Systems requiring mixed digital, analog, motion and communication modules