Remote Alarm Connection – General Fault Alarm
e CDAS HL / OFAS HL / FBP HL dryer controller includes a general fault alarm used to indicate power loss, dewpoint alarm or dewpoint
sensor failure.
Remote Alarm Connection Operation
Upon the application of power to the dryer and under normal dryer operation, the general fault alarm relay will be energised, changing the
states of the N/C & N/O contacts.
Should the dewpoint alarm be activated, a dewpoint sensor fault be detected, or a power loss occur, the relay will de-energise, changing the
state of the N/C & N/O contacts.
e general fault alarm is linked to a relay providing volt free contacts: Normally Closed (N/C), Normally Open (N/O), and a Common
(Com)
ese contacts are rated 24Vdc and 230Vac @ 1A and can be used for remote alarm indication. e user can select to use either N/C & Com
or N/O & Com to create a circuit should an alarm event occur.
28
Medium Flow Compressed Air Dryers - IOMI.
When the general fault alarm is active, an icon will be visible on the display.
POWER ON / NO ALARM
N/C & Com – Open Circuit
N/O & Com – Closed Circuit
POWER LOSS / ALARM ACTIVATED
N/C & Com – Closed Circuit
N/O & Com – Open Circuit
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