Product Description
Allen-Bradley 1756-CN2/B ControlNet Module
Product Overview
The Allen-Bradley 1756-CN2/B is a ControlNet Communication Module designed for ControlLogix systems. It provides high-speed (5 Mbps) communication for real-time control and supports up to 128 Logix communication connections. This module is chassis-based and can be installed in any slot of a compatible ControlLogix chassis.
Technical Specifications
| Attribute | 1756-CN2/B Details |
|---|---|
| Manufacturer | Allen-Bradley |
| Model Number | 1756-CN2/B |
| Description | ControlLogix ControlNet Communication Module |
| Configuration | Standard |
| ControlNet Communication Rate | 5 Mbps |
| Logix Communication Connections | 128 |
| Maximum Connections Supported | 131 |
| Maximum Number of Nodes | 99 |
| Current Draw @ 5.1V DC | 1100 mA |
| Current Draw @ 24V DC | 3 mA |
| Power Dissipation | 5.6 W |
| Thermal Dissipation | 19.1 BTU/hr |
| Isolation Voltage | 30V (continuous), Basic Insulation Type Type tested at 500V AC for 60 s |
| Weight (Approx.) | 0.26 kg (0.57 lb) |
| Slot Width | 1 |
| Module Location | Chassis-based, any slot |
| Compatible Chassis | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
| Standard Power Supply Compatibility | 1756-PA72/C, 1756-PA75/B, 1756-PB72/C, 1756-PB75/B, 1756-PC75/B, 1756-PH75/B |
| Redundant Power Supply Compatibility | 1756-PA75R, 1756-PB75R, 1756-PSCA2 |
| ControlNet Port | 1 ControlNet BNC |
| ControlNet Cable | 1786-RG6 Quad Shield RG6 Coaxial Cable |
| USB Port | USB Full Speed (12 Mbps) |
| Wiring Category | 1 (ControlNet ports) / 3 (USB ports) |
| Temperature Code (North America) | T4A |
| Temperature Code (IEC) | T4 |
| Enclosure Type Rating | None (Open-Style) |