Allen-Bradley 1756-CN2 ControlLogix ControlNet Communication Module
- Brand
- Allen-Bradley
- Model
- 1756-CN2
- GEARWELL SKU
- GWP-000003489
- Category
- PLCs & I/O
Key specifications
- Chassis width
- 1 slot
- Backplane current
- 1100 mA at 5.1 V DC; 3 mA at 24 V DC
- Network
- ControlNet
- ControlNet ports
- 1 BNC
- ControlNet network isolation
- 30 V continuous, basic insulation: ControlNet network to backplane
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← Back to productsProduct overview
The Allen-Bradley 1756-CN2 is a ControlNet bridge module from Rockwell's ControlLogix 1756 range. It is the standard ControlNet bridge with one ControlNet BNC port, drawing 1100 mA at 5.1 V DC and weighing about 0.26 kg. ControlNet runs at 5 Mbps with up to 99 nodes over 1786-RG6 quad-shield RG6 coaxial cable; the module supports 128 Logix connections (plus 3 reserved for redundant control) and has a USB port (12 Mbps) for temporary local programming. Rockwell now treats ControlNet as a legacy network. It installs in any slot of a 1756 ControlLogix chassis and takes one slot.
Technical reference
| Product name | Allen-Bradley 1756-CN2 ControlLogix ControlNet Communication Module |
|---|---|
| Brand | Allen-Bradley |
| Model | 1756-CN2 |
| Category | PLCs & I/O |
| Chassis width | 1 slot |
| Backplane current | 1100 mA at 5.1 V DC; 3 mA at 24 V DC |
| Network | ControlNet |
| ControlNet ports | 1 BNC |
| ControlNet network isolation | 30 V continuous, basic insulation: ControlNet network to backplane |
| Power dissipation | 5.6 W |
| Communication rate | 5 Mbps |
| Enclosure type | None (open-style) |
| Operating temperature | 0 to 60 °C |
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