Shield Aura - NAC and aux 24 V Terminals

NAC and AUX 24V Terminals
NAC terminals 1 to 4 provide 24 VDC @ 2.5 A. In the default state, these circuits can be connected as four Class
B supervised outputs. However, they can be configured as two Class A or two Class B and one Class A output.
Power limited circuits should be routed separately from non-power limited circuits. The following figure illustrates
the NAC and AUX 24V terminals of the Main Back Board:
Field Terminals Designation Supervision Power Limited
(+ ) and (- ) NAC 1 using EOL diode Yes
(+ ) and (- ) NAC 2 using EOL diode Yes
(+ ) and (- ) NAC 3 using EOL diode Yes
(+ ) and (- ) NAC 4 using EOL diode Yes
OUT (+ ) and (- )
RTN(+ ) and (- )
AUX 24V (1)
Supervision by connecting the end of the cable back to
the RTN
Yes
OUT (+ ) and (- )
RTN(+ ) and (- )
AUX 24V (2)
Supervision by connecting the end of the cable back to
the RTN
Yes
Main Back Board (AUL-9022)
SHIELD Fire, Safety & Security Ltd
Aura Fire Alarm Control Panel Installation Manual
Version 1.00 |June 2019 |MAN-1431VS
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