NFS2-640 Operations P/N 52743:L4 06/10/19 37
Output Circuit Trouble Mode of Operation Operation of the Control Panel
3.13.2 How the Control Panel Indicates a NAC Trouble
A Trouble occurring on a NAC causes the control panel to do the following:
• Produce a pulsed audible tone
• Flash the
SYSTEM TROUBLE LED
• Turn on the Trouble relay (TB4)
• Send a message to the LCD display, History buffer and installed printers, FDU-80
annunciators, and CRT-2s
• Display a
TROUBL status banner and a CONTROL Type Code on the LCD display, along with
information specific to the device
Figure 3.1 Sample of a NAC in Trouble Message
RELEASE CKT N NAC Directs outputs to perform a releasing function.
REL CKT ULC N NAC Directs outputs to perform a release function as required by ULC.
REL AUDIBLE N NAC NAC, activated upon release
NONRESET CTL* N NAC Relay output, unaffected by “System Reset” command
TELEPHONE N NAC Standard Telephone circuit
REL CODE BELL** N NAC Supervised NAC (NFS2-640 NAC only)
INSTANT RELE N NAC NAC, short = normal; supervised for open circuits and ground
faults. Always non-silenceable and switch-inhibited.
ALARMS PEND N NAC Output that will activate upon receipt of an alarm condition, and
remain in the alarm state until all alarms have been
acknowledged.
CONTROL NAC** N NAC Supervised NAC
GEN ALARM Y Control Module, an XPC-8 circuit, or an XP6-C configured as a
Municipal Box Transmitter for NFPA 72 Auxiliary Fire Alarm
Systems application. This Type ID can also be used for general
alarm activation.
GEN SUPERVIS Y Control Module, an XPR-8 relay, or an XP6-R activated under
any Supervisory condition (includes sprinkler type).
GEN TROUBLE Y Control Module, an XPR-8 relay, or an XP6-R activated under
any System Trouble condition.
GENERAL PEND Y Control Module, an XPC-8 circuit, or an XP6-C that will activate
upon receipt of an alarm and/or trouble condition, and remain in
the ON state until all events have been ACKNOWLEDGED.
TROUBLE PEND N Control Module, an XPC-8 circuit, or an XP6-C that will activate
upon receipt of a trouble condition, and remain in the ON state
until all troubles have been ACKNOWLEDGED.
MNS GENERAL
1
N NAC Mass Notification supervised output
MNS CONTROL
1
N NAC Mass Notification supervised output
MNS STROBE
1
N NAC Mass Notification supervised output
MNS SPEAKER
1
N NAC Mass Notification supervised output for speaker circuits
MNS RELAY
1
N Relay Mass Notification supervised output
* Type Code is Control Module type code only.
** Type Code is NAC Circuit type code only.
1
This type code is not compatible for First Command applications.
Table 3.8 Control Module and NAC Circuit Trouble Type Codes (2 of 2)
Status banner
Type Code
Time and date of trouble
TROUBL CONTROL FRONT HALLWAY NO. 2
OPEN 09:38A 041515 B02
Device Address
Type of Trouble
Custom Description for
this device location
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