IEC 60870-5-104
An international standard for telecontrol equipment and power-grid systems over TCP/IP, enforcing strict, millisecond-accurate timestamped telemetry for breaker changes and protection-relay events.
Type
Telecontrol Network Standard
Typical Latency
< 5ms — optimised for substation operations.
Hardware Requirements
Substation-grade switches and routers, structured fibre, synchronous clock interfaces (NTP/PTP), TCP port 2404.
Security
IEC 62351 compliance adds cryptographic authentication, TLS profiles and role-based access control.
Typical Use Case
Electrical substation automation, HV switchgear telemetry, captive power plants, grid injection, VCB dashboards.
Connection Parameters
- Default port
- TCP 2404
- Transmission
- Spontaneous (event-driven) or cyclic polling
- Timestamp format
- CP56Time2a (7-byte millisecond time-tag)
- APCI modes
- I-Format, S-Format, U-Format
Need IEC 60870-5-104 integration for your plant?
Our engineers configure drivers, gateways and security for this protocol as part of every Factomation deployment.