Time

The time can be accessed via the following means:

• For Serial variants, part number GC2-SER. A dedicated 1PPS Signal. This is the preferred means to obtaining the most accurate timing output.

• For Ethernet variants, part number GC2-POE. A built-in Precision Time Protocol (PTP) version 2 server for synchronisation with network-connected devices which require high accuracy time. The PTP server broadcasts PTP messages (Sync, Follow Up, Announce) to multicast IP address 224.0.1.129. The PTP broadcasts are sent whenever an Ethernet connection is established and cannot be disabled.
  
  - PTP version: 2, generic profile
  - Master output: UDP multicast
  - Clock sync: 2-step (1-step used as fallback if necessary)
  - 1PPS output: Internal clock / GNSS
  - Protocol: IEEE 1588
  - Delay mechanism: E2E (delay request-response)

• For Ethernet variants, part number GC2-POE. A built-in Network Time Protocol (NTP) server.