go-iec61850
IEC 61850 client and server with logical nodes, reports, controls and SCL as first-class Go types.
go get github.com/otfabric/go-iec61850← Standards and alliancesUser group · Energy and DER · Global
UCA International Users GroupUCAIug
The UCA International Users Group is a community of utilities, vendors and labs around utility communication standards. It hosts the 61850, CIM and OpenFMB user groups and organizes IEC 61850 interoperability testing.
- Cheapest way in
- From $1,375 (Corporate, tiers 1 to 8)
- Standards
- IEC 61850 / MMS
- Verified
- 23 Oct 2026
OT Fabric is not affiliated with UCA International Users Group. This profile is independent and based on the organization's own published pages, linked next to each fact. UCAIug is the authority on its terms and fees.
What UCAIug does
- TestsIEC 61850 user group and IOP testing
- PromotesCIM (IEC 61968 / 61970) user group
- PromotesOpenFMB
Taking part
Each question is separate, because "open" and "free" mean different things here. A yes always means open or free to someone who is not a member.
- Can anyone read the specifications for free?
- Not applicableIEC 61850 and CIM are published by the IEC.
- Can anyone take part in the community?
- PartlyThe user-group sites (CIMug, 61850ug, OpenFMB) are included with membership; the IOP event invites global stakeholders. ucaiug.org
- Can an individual take part for free?
- Not publishedIndividual Consultant, University and PUC memberships say "Ask for pricing". ucaiug.org
- Can an organization join for free?
- NoCorporate membership starts at $1,375 a year. ucaiug.org
- Are technical working groups open to non-members?
- NoUser groups are a membership benefit; the IEC working-group site needs IEC expert approval. ucaiug.org
- Can non-members take part in interoperability testing?
- PartlyThe IEC 61850 IOP invites vendors, utilities, test labs, integrators and standards bodies; the page does not say whether membership is required. 61850ug.org
- Can a non-member certify a product?
- UnknownUCA runs a testing program (ucatesting.org); we have not yet verified its membership rules.
- Does it maintain or host open-source implementations?
- UnknownWe have not yet verified open-source activity.
Membership tiers and published fees
Published examples as listed on the organization's pages on 23 Oct 2026. Where a page does not say whether a fee recurs, we do not guess.
| Tier | Published fee | Who can join | Votes | Working groups | Source |
|---|---|---|---|---|---|
| Corporate, tiers 1 to 8 | $1,375 to $20,000 a year | By annual revenue: tier 1 under $1M is $1,375 (5 accounts), tier 2 $1M to $10M is $2,750, up to tier 8 over $100B at $20,000.Corporate members vote for the Board of Directors. | Yes | Yes | ucaiug.org |
| Sustaining | $25,000 a year | Unlimited accounts. | Yes | Yes | ucaiug.org |
| Individual Consultant | On request | One account; apply on letterhead describing your smart grid activities. | Unknown | Yes | ucaiug.org |
| University | On request | Students, educators and researchers; one account. | Unknown | Yes | ucaiug.org |
| Public utility commission | On request | Public utility commissions; one account. | Unknown | Yes | ucaiug.org |
Certification and interoperability
- Interop event · membership rules not statedIEC 61850 Interoperability Testing (IOP)Multi-day interoperability event for vendors, utilities, labs, integrators and standards organizations. The 2024 edition ran 12 to 20 September in Birmingham, Alabama. 61850ug.org
What stands out
For IEC 61850, the committee that writes the standard and the community that tests it are different bodies. IEC TC 57 develops the standard, and experts reach it through national committees. UCAIug is where utilities, vendors and labs meet to share experience and run the interoperability (IOP) events.
Corporate membership is priced by revenue and starts at $1,375 a year for companies under $1M. Individual, university and regulator memberships exist but are priced on request, so a solo engineer has to ask.
The IOP is the main public venue where independent IEC 61850 implementations meet. Its page invites global stakeholders without stating a membership requirement, so it is worth asking the organizers directly before planning around it.
Related organizations
Related OT Fabric projects
Independent open-source work on the same protocols. Listing them here does not mean they are certified by or associated with UCAIug.
go-mms
MMS (ISO 9506) client and server, the transport underneath IEC 61850.
go get github.com/otfabric/go-mmsiec61850ctl
Browse IED data models, read and write, operate controls, subscribe to reports and parse SCL.
mms-interop
MMS and IEC 61850 adapter images for libiec61850 and IEC61850bean.
Sources
- Join UCAIug ucaiug.org
- 61850 IOP testing 61850ug.org
Verified on 23 Oct 2026; due for a re-check by 21 Apr 2027 (180 days). Found something out of date? Report a correction or edit the data on GitHub.