7
Installation and Operation
1.5 FAI Connections
This section provides more detailed information on the connection and usage of the FAI input.
Activation with a Normally Open Relay Contact
FAI Activates when the
NO contact CLOSES.
FAI Deactivates when the
NO contact OPENS.
Activation with a Normally Closed Relay Contact
FAI Activates when the
NC contact OPENS.
FAI Deactivates when the
NC contact CLOSES.
Note: FAI with a NC contact
cannot be tested by removing
the terminal strip, as this will
remove the jumper wires from
V+ and V- as well. To test,
remove one wire going to the
NC Contact.
Activation with a Voltage Input
FAI Activates when voltage is
APPLIED in the correct polarity.
FAI Deactivates when voltage is
REMOVED or the polarity of the
voltage is REVERSED. Polarity
shown in the ACTIVATED state
Latching the FAI Input
Latching of the FAI Input
is achieved by placing a
NC contact across the
two ‘L’ terminals. The FAI
may be activated by any
of the methods listed.
FAI Deactivates when the
input is deactivated AND
the NC Latching contact is
momentarily OPENED.
Example – NO Contact
activation with latching
FAI Activates when the NO contact CLOSES. FAI Deactivates
when the NO contact OPENS AND the NC contact momentarily
OPENS.
FAI Activation with a Normally Open Relay Contact
and PSX AC Fault Lock Over Ride
FAI Activates either, when the Fire Alarm NO contact CLOSES,
or when the AC Fault NC contact CLOSES
FAI Deactivates either, when the Fire Alarm NO contact OPENS,
or when the PSX AC Fault NC contact OPENS
SYS ACSYS AC
FAULTSFAULTS
FAI
INPUT
CC NCNC NONO CC NCNC NONO
FAI INPUTFAI INPUT
LL LL V–V– I–I– I+I+ V+V+
FAI INPUTFAI INPUT
LL LL V–V– I–I– I+I+ V+V+
NO
Contact
NC
Contact
FAI INPUTFAI INPUT
LL LL V–V– I–I– I+I+ V+V+
–
+
FAI INPUTFAI INPUT
LL LL V–V– I–I– I+I+ V+V+
NO
Contact
NC
Contact
FAI INPUTFAI INPUT
LL LL V–V– I–I– I+I+ V+V+
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