The FENA-21 is an Ethernet Adapter Module — dual port — listed under ABB's PLC expansion modules line, carrying Modbus and Profinet on the fieldbus side. The listing marks it as a Phase 2 module and ships under a single order code with no separate sub-variant.
ABB FENA-21 Ethernet Adapter Module, Modbus/Profinet, Phase
MPNFENA-21
ABB FENA-21 Ethernet Adapter Module, dual-port fieldbus slice carrying Modbus and Profinet, Phase 2, product number FENA-21.
$427.48 – $553.82Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product type | Ethernet Adapter Module |
| Field bus communication type | Modbus, Profinet |
| Phases | 2 |
| Shipping weight | 2.5Kg |
| Estimated lead time | Usually ships in 1 - 10 working days.. |
Product details
Frequently asked questions
What is FENA-21's listed phase on the PLC Expansion Modules line?
The listing carries Phase 2 for the FENA-21.
What is FENA-21's listed product number?
The product number is FENA-21.
What fieldbus protocols does the FENA-21 support?
The FENA-21 exposes Modbus and Profinet on its dual Ethernet ports, so a single adapter carries the AC500 CPU onto both fieldbus layers without a separate gateway.
MPN
FENA-21