PLC
Part Number: 1756-CN2R Communication PLC
The Allen-Bradley 1756-CN2R is a ControlLogix Communication Module designed for high-speed, redundant ControlNet network communication. It provides deterministic, real-time control and I/O data exchange in industrial automation applications. This module supports up to 99 nodes and features two ControlNet BNC ports for network redundancy.
Specifications
| Communication Protocol | ControlNet |
| Number of Channels | 2 |
| Redundancy Support | Yes |
| Transmission Rate | 5000 kbps |
| Logix Communication Connections | 128 |
| Power Dissipation | 6.7 W |
| Thermal Dissipation | 22.9 btu/h |
| ControlNet Ports | 2 BNC |
| Maximum Nodes | 99 |
| Current Draw | 1300mA @ 5.1V DC, 3mA @ 24V DC |
| Operating Temperature | 0 to 60 °C |
| Storage Temperature | -40 to 85 °C |
| Relative Humidity | 5...95% noncondensing |
| Weight | 0.54 kg |
| Enclosure Type | None (open-style) |
| Slot Width | 1 |
| Backplane Current | 1300mA @ 5.1V DC |
| Isolation | 1500V AC for 1 minute |
| Certifications | UL, CSA, CE, ATEX |
| Network Type | Deterministic, Real-time |
| I/O Capacity | Up to 99 nodes |
| Scan Time | 2ms typical |
| Memory | Shared with ControlLogix processor |