ControlLogix ControlNet Communication Module, Series B
| Sales | Phone/Whatsapp | |
| Jim Pei | [email protected] | +86 18020776782 |
| Model Number | 1756-CN2 B |
| Hardware series | B |
| ControlNet channel | 1 |
| ControlNet connector | 1 BNC |
| ControlNet data rate | 5 Mbit/s |
| Maximum network nodes | 99 |
| Normal node-address range | 01-99 |
| USB interface | USB 1.1 device; Type B receptacle |
| Connections supported | 131 maximum; 3 reserved for redundancy, 128 for standard use |
| Backplane current at 5.1 V DC | 1.1 A |
| Backplane current at 24 V DC | 3 mA |
| Maximum power dissipation | 5.6 W |
| Maximum thermal dissipation | 19.1 BTU/h |
| Continuous isolation voltage | 30 V; basic insulation |
| Isolation test | 500 V AC for 60 s, ControlNet network to system |
| Chassis requirement | 1 slot in a ControlLogix chassis |
| Enclosure type | Open style |
| Operating temperature | 0-60 °C |
| Storage temperature | -40 to +85 °C |
| Relative humidity | 5-95%, noncondensing |
| Operating vibration | 2 g at 10-500 Hz |
| Operating shock | 30 g |
| Non-operating shock | 50 g |
| North American temperature code | T4A |
| IEC temperature code | T4 |
| Emissions classification | CISPR 11, Group 1, Class A |
| ESD immunity | 6 kV contact; 8 kV air |
| ControlNet EFT/B immunity | ±2 kV at 5 kHz |
| ControlNet surge immunity | ±2 kV line-to-earth, common mode |
| Minimum Order Quantity | 1 Piece |
| Price | Contact for Jim |
| Packaging Details | Original new Factory Sealed |
| Delivery Time | 3–7 Days |
| Payment Terms | T/T |
| Shipping Method | DHL / FedEx / UPS / TNT |
| Supply Ability | Brand new, In stock |
Allen-Bradley 1756-CN2 B is a Series B ControlLogix communication module for a single ControlNet channel. The network interface uses a BNC connection. Its USB device interface has a Type B receptacle for temporary network access. The module occupies one chassis slot. The open-style construction requires a suitable equipment enclosure.
The 1756-CN2 B connects a ControlLogix chassis to a ControlNet installation that does not require redundant media. The module provides network configuration-keeper capability. A valid master keeper distributes configuration information to other keeper-capable nodes. Node-address settings and stored network configuration must remain consistent. Match the hardware series and the existing control-system configuration before replacement.
Connect the chassis to the ControlNet installation through its single network channel.
Use the Series B USB device port for the supported temporary network connection.
Participate as a keeper-capable node in distributing and retaining the ControlNet configuration.
Series B uses USB for the temporary network connection. Do not assume that the Series A access-cable arrangement applies.
It must hold a valid configuration and have the lowest address among the keeper-capable nodes before it becomes the master keeper.
It is the factory-reset setting, not a valid operating ControlNet node address.
The module has been moved after keeper data was downloaded. Restore the correct slot or update the network configuration using the appropriate procedure.
No. The single-media configuration has one ControlNet channel. A redundant-media installation requires the corresponding redundant-media module.
The network configuration must be loaded with RSNetWorx for ControlNet instead of relying on an automatic crossload.
Company was founded in Xiamen, Fujian, China, in 2005 with a team of only four people. At that time, we mainly served selected European and North American markets, supplying commonly requested industrial automation products from Siemens, Allen-Bradley and Bently Nevada. Although the business was still developing and we completed relatively few orders, this period helped us build essential product knowledge and international trade experience.
By 2017, our team had grown to approximately 30 people, and we had established a warehouse for in-stock automation components. Our business expanded across Europe, North America and Southeast Asia, while our product range grew from popular models to scarce and discontinued industrial automation parts. As our product knowledge and service experience increased, we completed nearly 20 orders per month on average.
Today, Company serves customers worldwide with a professional team of approximately 60 people. Our warehouse holds a broad selection of industrial automation components, including popular products, hard-to-find parts and discontinued models. We now complete more than 30 orders per month, with an average monthly transaction value of approximately USD 3 million. We have established long-term partnerships with nearly 30 customers from different countries and welcomed almost 40 international customers to visit our company.
Since our company was founded, we have served every customer with sincerity and professionalism. Our prices may not always be the lowest, but we earn long-term trust through quality products, dependable after-sales support, honest condition reporting, timely communication and responsible delivery. Our goal is to build lasting partnerships rather than pursue one-off transactions.
Our team members have an average of more than 10 years of industry experience. We have worked with customers worldwide, including those from India, Germany, Sweden, Italy, Russia, Venezuela, Israel, and many other countries. Throughout our careers, we have collectively completed over 3,000 orders and established long-term business relationships with customers across nearly 30 countries.
We can often identify a product’s manufacturer, series, configuration, and function from its model number or nameplate photo. We also understand how revisions, firmware, and specifications affect compatibility and whether an alternative model can be used safely.
An Indian customer urgently needed a discontinued control module after several suppliers reported no stock. We identified its exact revision and function from the nameplate, checked compatible alternatives, and contacted factory and warehouse channels to locate matching inventory. After installation, the customer confirmed that the module operated correctly and later asked us to source additional spare parts.
Our team treats every inquiry sincerely and answers every question patiently. Even for complex requests, we verify and respond to each detail instead of providing a rushed or uncertain answer.
A German customer sent a mixed list of automation products and asked repeated questions about revisions, condition, photos, and delivery. Our team organized the requirements, checked every item, and replied point by point. The customer said our detailed communication made the purchasing decision easier and continued sending us new inquiries.
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