The relay supports the following high accuracy time
synchronization method with a time-stamping resolution 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 module.
IEEE 1588 v2 features
• Ordinary Clock with Best Master Clock algorithm
• One-step Transparent Clock for Ethernet ring topology
• 1588 v2 Power Profile
• Receive (slave): 1-step/2-step
• Transmit (master): 1-step
• Layer 2 mapping
• Peer to peer delay calculation
• Multicast operation
Required accuracy of grandmaster clock is +/-1 µs. The relay
can work as a master clock per BMC algorithm if the external
grandmaster clock is not available for short term.
The IEEE 1588 support is included in all variants having a
redundant Ethernet communication module.
In addition, the relay supports time synchronization via
Modbus, DNP3 and IEC 60870-5-103 serial communication
protocols.
Table 5. Supported station communication interfaces and protocols
Interfaces/Protocols Ethernet Serial
100BASE-TX RJ-45 100BASE-FX LC RS-485 Fiber optic ST
IEC 61850-8-1 ● ● - -
IEC 61850-9-2 LE - ●
MODBUS RTU/ASCII - - ● ●
MODBUS TCP/IP ● ● - -
DNP3 (serial) - - ● ●
DNP3 TCP/IP ● ● - -
IEC 60870-5-103 - - ● ●
● = Supported
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