The decision: which industrial networking fieldbus module should you buy?
When your control network needs to move beyond a simple office LAN, the buying decision gets harder: do you need a new communication module from Allen-Bradley, a managed industrial switch from Cisco, or a 24-port module at a fraction of the price? The four options here span $39.99 to $930, so the right choice depends less on 'which is best' and more on what your cabinet and network architecture actually require.
Quick take
If you need a new Allen-Bradley part, the 1756-EN2T at $930 is the only new module in this group. If you need 24 ports and the lowest price, the Vevor BAYU-PJ12 at $39.99 is the clear pick. For a managed Cisco switch with dual DC power and an alarm relay, the $250 IE-3000-8TC listing brings the most feature detail. If the same Cisco model at the lowest possible price matters more than cosmetics, the $54.99 IE-3000-8TC module is the cost-conscious route.
Listed price comparison
| Product | Listed Price | Price Bar | Key Detail |
|---|---|---|---|
| Allen-Bradley 1756-EN2T Communication Module | USD 930.00 | New industrial network communication module | |
| Vevor BAYU-PJ12 24-Port Network Module | USD 39.99 | Used 24-port industrial Ethernet switch module | |
| Cisco IE-3000-8TC Managed Switch (16 ports) | USD 250.00 | Used managed switch with dual DC inputs and alarm relay | |
| Cisco IE-3000-8TC Switch Module | USD 54.99 | Used Cisco IE-3000-8TC module with visible wear |
Decision matrix
- Need a new Allen-Bradley communication module? Choose the Allen-Bradley 1756-EN2T at $930.
- Need 24 ports and the lowest spend? Choose the Vevor BAYU-PJ12 at $39.99.
- Need a managed industrial switch for harsh environments? Choose the Cisco IE-3000-8TC at $250.
- Need a Cisco IE-3000-8TC at the lowest price? Choose the $54.99 Cisco IE-3000-8TC module.
Product notes
Allen-Bradley 1756-EN2T Communication Module
At $930, this sits at the top of the price range and is the only listing in new condition. The 1756-EN2T is positioned as an industrial equipment network communication module, which matters if your system is built around Allen-Bradley parts and you want a part that has not been previously installed. Choose it when part-number certainty and new condition outweigh price. The limitation is straightforward: you pay around $890 more than the lowest-priced option here, and the listing does not describe it as a switch, so it is not a direct alternative for someone shopping for port expansion. If you need a new communication module with the exact 1756-EN2T reference, it is the only one in this lineup.
Vevor BAYU-PJ12 24-Port Industrial Ethernet Switch Module
For $39.99, the Vevor BAYU-PJ12 is the most affordable path to 24 ports in this group. The listing identifies it as a used network module with a 24-port layout and describes it as tested and inspected. If your project needs a lot of connections on a limited spend, this is the option to start with. The trade-off is that it is used, and the listing says what is included is only what is shown in the photos, so you are not paying for a full accessory package. It also carries the Vevor name rather than a Cisco or Allen-Bradley part number, which can matter in environments where vendor standardization is a requirement. For setups where that kind of standardization is less critical, it keeps the cost down.
Cisco IE-3000-8TC Managed Switch (16 Ports)
The $250 Cisco IE-3000-8TC is the listing that spells out managed-switch capabilities: dual DC power inputs, alarm relay, console port, and a hazardous-location rating are all part of the description. It also lists 16 Ethernet (RJ-45) ports and an operating temperature range of -40°C to +60°C, making it the strongest candidate in this comparison for a harsh-environment install. Condition is Grade B, which the description says means it may have slight scratches from handling but has been tested for key functions and retains plastic covering on one side. No accessories are included, so factor that into the higher price. Choose it when you need the management features and environmental specifications that the lower-cost listings do not spell out.
Cisco IE-3000-8TC Switch Module (Lowest-Priced Cisco Option)
For $54.99, this used Cisco IE-3000-8TC module gives you the same base model name as the $250 unit, but at a much lower price. The listing describes it as pulled from a working environment with signs of use such as scratches or scuffs, and it warns that the photos represent the general condition. If you are comfortable with cosmetic wear and want to put the savings toward other network components, this is the cost-effective way to get an IE-3000-8TC on your shelf. The limitation is condition: it is used, visually imperfect, and the listing does not include the management-feature detail that the $250 listing provides. That makes it a better fit when you already know the platform and are prioritizing price over presentation.
Final recommendation by use case
- For a new Allen-Bradley communication module: Allen-Bradley 1756-EN2T at $930.
- For 24 ports on the smallest budget: Vevor BAYU-PJ12 at $39.99.
- For a managed switch in harsh environments: Cisco IE-3000-8TC at $250.
- For the lowest-priced Cisco IE-3000-8TC: the $54.99 module.
