Product image is representative; revision or series may vary. Contact us to request a specific version.
The Allen Bradley 1756-CNB functions as a ControlNet bridge module, providing high-speed communication capabilities for the ControlLogix system. It supports a network communication rate of 5 Mbps and facilitates up to 64 Logix connections, allowing integration with many devices.
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| Manufacturer | Allen Bradley |
|---|---|
| Product Type | ControlNet Bridge Module |
| Product Line | ControlLogix |
| Part Number | 1756-CNB |
| GTIN | 10612598174079 |
| Weight | 0.56 lbs (0.26 kg) |
| UPC | 612598174072 |
| Communication Rate | 5 Mbps |
| Max. Logix Connections | 64 Connections |
| Max. Number of Nodes | 99 Nodes |
| Backplane Voltage at 5.1V DC | 970 mA |
| Backplane Voltage at 24V DC | 1.7 mA |
| Continuous Isolation Voltage | 30V with basic insulation |
| Operating Temperature | 0 to 60 degrees Celsius |
| Temperature Code | T4 Code |
| Max. Surrounding Air Temperature | 60 degrees Celsius |
| Max. Relative Humidity | 80% RH, non-condensing |
The 1756-CNB from Allen Bradley is a specialized ControlNet bridge module that enhances the flexibility and connectivity of the ControlLogix series. Capable of processing a communication rate of up to 5 Mbps, this device is engineered to optimize data transmission across the network. It allows for a maximum of 64 Logix connections, which supports extensive application configurations. Additionally, the module can connect up to 99 nodes, ensuring comprehensive integration within large systems.
With significant attention to electrical characteristics, the 1756-CNB draws 970 mA at a backplane voltage of 5.1 volts DC and only 1.7 mA at 24 volts DC, which indicates efficient power usage. The device is designed to operate within a continuous isolation voltage of 30 volts when utilizing basic insulation, making it safe for most industrial environments. Moreover, its temperature range spans from 0 to 60 degrees Celsius, with a maximum surrounding air temperature also capped at 60 degrees Celsius. The temperature code assigned to this module is T4, indicating suitable thermal characteristics.
Operating effectively in conditions of up to 80% relative humidity, the 1756-CNB adds versatility to control systems without the risk of condensation forming. This makes it ideal for various industrial applications requiring reliability and efficient communication.
| Revision Part # | Also known as | |
|---|---|---|
| 1756-CNB Ser A | 1756-CNB/A, Series A, Rev A | |
| 1756-CNB Ser B | 1756-CNB/B, Series B, Rev B | |
| 1756-CNB Ser C | 1756-CNB/C, Series C, Rev C | |
| 1756-CNB Ser D | 1756-CNB/D, Series D, Rev D | |
| 1756-CNB Ser E | 1756-CNB/E, Series E, Rev E | |
| Don't see your particular revision? Contact us now. | ||
Yes, the 1756-CNB includes a free 2-year DO Supply warranty. You can upgrade to a 3-year warranty at checkout for even more protection.
The 1756-CNB's power dissipation is 5.14 Watts.
The 1756-CNB has 2 ports/
The 1756-CNB has 99 nodes.
The 1756-CNB Series E modules work for all non-redundant ControlLogix applications. For ControlLogix Redundancy releases 8,11,13, and 15, only Series D of this module is supported. Series E is supported in Redundancy releases 15 and later.
Check for fault: icpserv.c line 2068, which indicates a hardware or chassis failure
Do a Visual inspection for faulted or damaged components
Check connecting pins
OK light should be flashing
Ensure node addresses are correct in programming as well as on each device
Port A will turn green when an adequate connection is made with the ControlNet network
The card should be visible in your ControlNet network ( check revisions for compatibility)
Check each ControlNet coax cable as well as all other communications cables for damage
Check literature for LED indicator codes
Slide the card into the chassis and apply power to the rack
Add the CNB into the processor's backplane
Download the file to the processor with the 1756-CNB card added to the backplane
I/O OK light will be solid green
If you are directly connected to the CNB card it will be visible in RS-Linx along with any other module that is connected to the card with the ControlNet coax cable
Allen Bradley ControlLogix Bridge Module with 99 Maximum Nodes