MC30-R2
Doc. N°
MO-0462-ING
Copyright 2012
FW: 1290.37.01.x
Date
06.09.2022
Rev.
1
Pag.
22
of
38
6. Digital Inputs
Three optoisolated, selfpowered Digital Inputs D1, D2, D3 are provided.
A Digital Input is activated when its terminals are shorted by a cold contact.
D1
(terminals 22 - 19)
:
It is usable as Function Blocking Input
D2
(terminals 22 - 21)
:
It is used for Remote Trip
D3
(terminals 22 - 20)
:
The digital Input indicates the position of the Circuit Breaker
(Input Closed = C/B closed; Input Open = C/B open).
If the option External Trigger = Enabled any time the DI passed from
closed to open the oscillographic recording is started.
7. Selfdiagnostic
The relay incorporates a sophisticated selfdiagnostic feature that continuously checks the following elements:
A/D conversion
Checksum of the settings stored into E
2
Prom.
DSP general operation (Power, Routines, etc.)
Lamp test (only on manual test).
Any time Power is switched on, a complete test is run; then, during normal operation, the test runs
continuously and the checksum is done any time a parameter is stored into E
2
Prom.
If during the test any Relay Internal Failure (I.R.F) is detected:
If “
I.R.F.
” is programmed to “
Trip
”
, the programmed output relays are operated same as on tripping of any
protection functi
on operation is stored in the “
Event Records
”
and the I.R.F. signal led is set to flashing.
If “
I.R.F.
”
is programmed to “
NO Trip
”, and only the I.R.F. signal led is set to flashing.
