40 HPFF12 NAC Expander — P/N 53576:B 11/24/2010
Trouble Supervision Trouble Reporting
Alarm
4.2.1 TB2: AC FAIL Contacts
TB2’s AC FAIL contacts are not supervised by the HPFF power supply, but will be supervised by
the FACP. The normally shorted COMM and N/C contacts will transfer to the COMM and N/O
contacts being shorted, only when an AC failure occurs. The transfer always occurs immediately
and will not
be delayed even if DIP switch 7 is in the ON position. These contacts should be used
for local reporting of an AC failure for compliance of UL 864 9
th
Edition.
4.2.2 TB2: TROUBLE Contacts
TB2’s TROUBLE contacts are not supervised by the HPFF power supply, but will be supervised by
the FACP. The normally shorted COMM and N/C contacts will transfer to the COMM and N/O
contacts being shorted when a fault condition occurs. The transfer will not be delayed except if the
fault is an AC failure and DIP switch 7 is in the ON position. The transfer will be delayed for 2
hours in this case. These contacts should be used for delayed remote reporting of an AC failure for
compliance of UL 864 9
th
Edition.
4.2.3 TB3: Initiating Device Inputs SIGNAL 1 and SIGNAL 2
TB3’s alarm SIGNAL 1 and SIGNAL 2 inputs are not supervised by the HPFF power supply. They
will be supervised by the FACP or initiating device. The four connections +IN, –IN, +OUT, and –
OUT are used to connect either from a two-wire/Class B (Style Y) NAC with an end-of-line
resistor (ELR) or a four-wire/Class A (Style Z) NAC.
Alarm Trouble contacts
Fault
TB2: AC
Fail
TB2:
TROUBLE
TB3: +IN &
+OUT
LED Reset?
Field Wiring
(NAC & +/-
REF)
Short or
Open
Excessive
Load (Two
re-tries of
>4 Amps)
(Note 1) (Note 2) closed
LED1: SIG1 TRBL Steady Illumination
SW1 or
Power cycle
LED2: SIG2 TRBL Steady Illumination
SW1 or
Power cycle
LED3: SIG3 TRBL Steady Illumination
SW1 or
Power cycle
LED4: SIG4 TRBL Steady Illumination
SW1 or
Power cycle
Ground Fault (Note 1) (Note 2) closed LED5: GF TRBL Steady Illumination Auto
Battery No battery or <20.5 VDC (Note 1) (Note 1) closed LED6: BATT TRBL (Note 4) (Note 4)
Battery
Charger
Fault (Note 1) (Note 1) closed LED6: BATT TRBL (Note 4) (Note 4)
Battery not reach float
(Note 3)
(Note 1) (Note 1) closed LED6: BATT TRBL (Note 4) (Note 4)
Auxiliary
Output
Excessive load or short (Note 1) (Note 1) closed LED7: AUX TRBL Steady Illumination Auto
AC
Loss or
Brownout
No Delay
Immediate
transfer
No delay
transfer
closed LED8: PWR ON Blink Auto
Delay
Immediate
transfer
2hr delayed
transfer
closed LED8: PWR ON Blink Auto
1. No transfer and COMM & N/C are shorted.
2. The shorted contacts of COMM & N/C transfer to COM & N/O.
3. A battery fail indication can also occur if there was an AC failure within the first 24 hours after initial power-up and the battery voltage had been
discharged to a voltage between 20.5- 26.5 VDC. The BATT TRBL battery trouble LED may illuminate steady, after a certain delay during
charging, to indicate the battery was discharged and may not support a full alarm load. The delay is based on operational conditions (time
remaining in the first 24 hours, time in stand-by, and time in alarm) and will extinguish if the battery charging has time to reach its float voltage.
4. Battery Charger disabled during alarm.
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