Section 10 Requirements; Sntp Server Requirements; Ptp Requirements - ABB Relion SAM600 Applications Manual

1MRK 511 445-UEN B
Section 10
10.1

SNTP server requirements

The SNTP server to be used is connected to the local network, that is not more than 4-5
switches or routers away from the IED. The SNTP server is dedicated for its task, or at least
equipped with a real-time operating system, that is not a PC with SNTP server software. The
SNTP server should be stable, that is, either synchronized from a stable source like GPS, or
local without synchronization. Using a local SNTP server without synchronization as primary or
secondary server in a redundant configuration is not recommended.
10.2

PTP requirements

For PTP to perform properly, the Ethernet equipment that is used needs to be compliant with
IEEE1588. The clocks used must follow the IEEE1588 standard BMC (Best Master Algorithm)
and shall, for instance, not claim class 7 for a longer time than it can guarantee 1us absolute
accuracy.
Switchgear control unit SAM600-IO
Application manual
Requirements
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Section 10
Requirements
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