Sintrol S303 - Page 24

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Relay functional logic
CONDITION
RELAY 1
RELAY 1
Term. Block
RELAY 2
RELAY 2
Term. Block
ANALOG
[mA]
NORMAL DUST LEVEL
AND OPERATION
Energized
A-C: open
B-C: closed
Energized
A-C: open
B-C: closed
According
to Dust level
ALERT
Relax
A-C: closed
B-C: open
Energized
A-C: open
B-C: closed
According
to Dust level
ALARM
Relax
A-C: closed
B-C: open
Relax
A-C: closed
B-C: open
According
to Dust level
AUTO SETUP
Relax
Relax
>23 mA
FAULT,
MAINTENANCE
Relax
Relax
>23 mA
Table 1: Relay functional logic
 ENERGIZED relay is when power is applied to the coil
 RELAXED relay is when no power is applied to the coil
 ANALOG signal during fault condition is >23mA
LED and Display functional logic
CONDITION
GREEN LED
RED LED
DISPLAY
(S303, S304)
NORMAL DUST LEVEL
AND OPERATION
on
off
on, According
to Dust level
ALERT
on
on
(appears as
orange)
on, According
to Dust level
ALARM
off
on
on, According
to Dust level
AUTO SETUP
blink
off
count down [s]
MAINTENANCE
blink alternating
with red (500ms)
blink alternating
with green (500ms)
conditional to
diagnostic code
FAULT INDICATION
off
blink alternating
left and right with
interval 500ms
conditional to
diagnostic code
or - - - -
Table 2 LED and Display functional logic