IM30-DK
Doc. N° MO-0040-ING
Rev.
2
Pag.
17
of
34
Copyright 2010 - Microener
7. DIGITAL INPUTS
Three digital inputs are provided: they are active when the relevant terminals are shorted:
B2
(terminals 1
– 2)
:
it blocks the operation of the of the time delayed elements relevant to
phase fault detection
When a function is blocked the pick-up of its output is inhibited. Programming allows to have the
inhibition either permanent as long as the blocking input is active [tB2 = Dis] or automatically removed
with a programmable wait-time 2xtBF [tB2 = 2tBF] after the operation of the time delayed function.
By proper interconnection of the blocking inputs and output among different relays, it is possible to
configure very efficient arrangements of logic fault discrimination.
B3
(terminals 1 - 3)
:
Indication of C/B status (N/C contact of the C/B) and - if the variable
ExTrig is set to ON
– external trigger of the oscillography wave-form
capture at any C/B opening.
B14
(terminals 1 - 14)
:
Switching-over from Setting Program 1 (SP1) to Setting Program 2 (SP2)
-
Terminals 1
–14 open = SP1 active
-
Terminals 1
– 14 shorted = SP2 active
The input B4 can also be activated via the serial communication port: in
this case the switching-back from SP2 to SP1 can only be made via
serial port.
Viceversa if the terminals 1
– 14 are shorted, the switching back from
SP2 to SP1 cannot be made via the serial port.
8. TEST
Besides the normal "WATCHDOG" and "POWERFAIL" functions, a comprehensive program of self-test
and self-diagnostic provides:
Diagnostic and functional test, with checking of program routines and memory's content, run every
time the aux. power is switched-on: the display shows the type of relay and its version number.
Dynamic functional test run during normal operation every 15 min. (relay's operation is suspended
for less than
4 ms). If any internal fault is detected, the display shows a fault message, the Led
"PROG/IRF" illuminates and the relay R5 is deenergized.
Complete test activated by the keyboard or via the communication bus either with or without tripping
of the output relays.
