Signallings
C
236 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
The following table shows the possible signals, and their meaning:
Pos.
Description
Power LED, green. The possible states are:
B
• Off: power supply absent.
• On fixed: power supply and communication with the trip unit present (with a trip unit with the
Alive LED option disabled).
• On, with one flash per second (synchronized with that of the green LED on the trip unit):
A
power supply and communication with trip unit present (with a trip unit with the Alive LED
option enabled).
• On, with two quick flashes per second (not synchronized with those of the green LED on the
trip unit): power supply present, and communication with trip unit absent (for example: because
of Local Bus disabled).
Link LED, green. The possible states are:
B
• Off: connection error (signal absent).
• On fixed: correct connection.
A
Activity LED, yellow. The possible states are:
C
• Off: no activity on the line.
• On flashing: activity on the line (in reception and/or transmission).
Electronic accessories | 13 - Ekip Com IEC 61850 modules
ABB | SACE Emax 2