Allen-Bradley 1756-CNB SER.E ControlLogix Communication Module

The Allen‑Bradley 1756‑CNB Series E is a ControlLogix ControlNet communication interface module designed to provide high‑speed, deterministic data exchange between ControlLogix controllers and ControlNet devices. This single‑channel module supports scheduled and unscheduled messaging for real‑time industrial automation networks. Technical Specifications Manufacturer: Allen‑Bradley (Rockwell Automation) Manufacturer Part Number: 1756‑CNB Series: Series E Product Type: ControlLogix Communication Module Communication Protocol: ControlNet Channel Configuration: Single Channel Maximum Network Nodes: Up to 99 Network Speed: 5 Mbps Connector Type: BNC coaxial Power Supply: ControlLogix backplane powered Backplane Voltage: 24 VDC Backplane Current Draw: Approx. 330 mA @ 5.1 VDC, 3 mA @ 24 VDC Power Dissipation: Approx. 5.6 W Indicators: Module status, network status, channel status LEDs Memory: On‑board nonvolatile memory Hot‑Swappable: Yes Chassis Compatibility: ControlLogix 1756 series chassis Mounting Type: Chassis slot mounting Operating Temperature Range: 0 °C to +60 °C (32 °F to 140 °F) Storage Temperature Range: ‑40 °C to +85 °C Humidity Rating: 5–95% non‑condensing Certifications: UL Listed, CSA Certified, CE, cULus Application Compatibility: PLC‑5, SLC 500, I/O devices, drives, HMIs over ControlNet Typical Applications: Distributed I/O control, high‑speed automation networks, industrial process control Form Factor: Standard ControlLogix module Country of Manufacture: United States Please review pictures carefully and let us know if you have any questions!