The relay supports the following high accuracy time
synchronization method with a time-stamping res-
olution of 4 μs required especially in process bus
applications.
• PTP (IEEE 1588) v2 with Power Profile
The IEEE 1588 support is included in all variants
having a redundant Ethernet communication mod-
ule.
IEEE 1588 v2 features
• Ordinary Clock with Best Master Clock algorithm
• One-step Transparent Clock for Ethernet ring to-
pology
• 1588 v2 Power Profile
•
• Transmit (master): 1-step
• Layer 2 mapping
• Peer to peer delay calculation
• Multicast operation
μs.
The relay can work as a master clock per BMC algo-
rithm if the external grandmaster clock is not avail-
able for short term.
The IEEE 1588 support is included in all variants
having a redundant Ethernet communication mod-
ule.
In addition, the relay supports time synchroniza-
tion via Modbus, and DNP3 serial communication
protocols.
34 REF615 ANSI 5.0 FP1 FEEDER PROTECTION AND CONTROL
Interfaces/protocols Ethernet Serial
100BASE-TX RJ-45 100BASE-FX LC RS-232/RS-485 Fiber optic ST
• • — —
• • — —
— — • •
• • — —
— — • •
• • — —
—
Table 5. Supported station communication interfaces and protocols
• = Supported
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