ABB SACO 16D3, User Manual And Technical Description

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Start-up When the auxiliary supply voltage is connected,
all active alarm channels are indicated as already being acknowledged. These alarms are not to be
found in the event register.
Operational test The unit is tested by first acknowledged/reset all
alarms and then the acknowledge/reset push-
button is kept depressed for about 1 second.
This move will cause all LED indicators, except
the FAULT LED, to be switched on and the
digital display to indicate 8888 as long as the
push-button is depressed. If the acknowledge/ reset push-button is depressed for more than
15 s, the self supervision output relay drops of
and the FAULT LED is lit.
The operational test comprises the internal sys-
tem circuitry. The field contact circuits and
auxiliary devices must be tested separately.
Legend plate The screened plastic overlay is provided with
translucent windows for the 16 channels. The
channel legend texts are applied on a drawing
film also square-ruled to form 16 text fields. The
drawing film can be inserted in a slot along the
left-hand edge of the front plate, see figure 22.
The front plate including the legend text film
and the screened plastic overlay are kept in place
by means of four finger screws.
The legend text may be written with a drawing
ink pen or a typewriter. Together with the
annunciator unit a sheet of drawing film com-
prising three legend plates is delivered.
The channel text surface comprises 20 mm x 20
mm and the text area is ruled with four lines.
NOTE! The starting point for the first line of
the channel legend text is intended a few
millimeters from left in order not to cover the
visual LED indicator of the channel.
T 1
GROUND
FAULT
TRIP
G 1
MOTOR
GROUND FAULT
RELAY TRIP
Drawn with 2,5 mm
lettering guide
Drawn with 1,8 mm
lettering guide
1
Annunciator unit
identification number
FAULT
ON
SACO 16D3
Fig. 22. Partially withdrawn a drawing film.
Fig. 23. Channel legend text drawing film.