SFC-102 Installation & Operator’s Manual
10
4.0 Wiring the SFC-102
4.1 Wiring Specifications
Figure 8: SFC-102 Terminal Descriptions
Terminal
Label
Description
NAC 1
(+, –)
Notification Appliance Circuit # 1
24 V
DC
, Full-Wave Rectified voltage, 1.5 Amps max.
Programmable as Steady or Temporal output on alarm.
Supervised for opens, shorts and ground fault.
Power limited.
NAC 2
(+, –)
Notification Appliance Circuit # 2
24 V
DC
, Full-Wave Rectified voltage, 1.5 Amps max.
Programmable as Steady or Temporal output on alarm.
Supervised for opens, shorts and ground fault.
Power limited
AUX+
Auxiliary power output
24 V
DC
, filtered and regulated, 500 mA max., 400 mV P-P ripple, power limited. Aux
power shorts must be restored by removing all Aux Power loading.
COM
Auxiliary common power return,
unswitched
24 V
DC
, 500 mA max.
SCOM
Auxiliary common power return, switched
(open circuit on system reset or on 4-wire smoke detector reset)
24 V
DC
, 500 mA max. (Please refer to Appendix A for compatible 4-wire smoke
detectors.)
DAT
Data line for remote module communications
CLK
Clock line for remote module communications
TRB NO
Common Trouble relay, Normally Open contact
TRB C
Common Trouble relay, Common contact
TRB NC
Common Trouble relay, Normally Closed contact
The Common Trouble relay is normally energized and is de-energized on trouble.
Contacts are shown in the de-energized state.
Contacts are rated 30 V
DC
, 2 Amps.
ALM NO
Common Alarm relay, Normally Open contact
ALM C
Common Alarm relay, Common contact
