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FDU-80 Instruction Manual —
P/N 51264:C2 4/24/2019
Appendix A: UL 864 8th Edition Applications
A.1 Power Connections
The power run to the annunciator must be power-limited and supervised. Maximum FDU-80 current draw from the power supply (under
normal and alarm conditions) is 64.3 mA. Maximum current draw from the control panel's secondary power source (batteries) under loss
of AC power is 25 mA. Use 12-18 AWG (0.75-3.25 mm
2
) wire for 24VDC circuit connections. Power wire distance limitation is set by
1.2 volt maximum line drop from source to end of circuit.
Refer to the following illustrations for power connections (24 VDC, Non-Resettable Power) to UL 8th edition panels: NFS-640, AFP-
300/400, and FireWarden NFW-100.
!
WARNING: AHJ APPROVAL
THE NFS-640, AFP-300/400, AND FIREWARDEN NFW-100 HAVE NOT BEEN CERTIFIED TO COMPLY WITH THE
REQUIREMENTS IN THE STANDARD FOR CONTROL UNITS AND ACCESSORIES FOR FIRE ALARM SYSTEMS, UL
864 9TH EDITION. OPERATION OF THESE PRODUCTS WITH PRODUCTS TESTED FOR UL 864 9TH EDITION HAS
NOT BEEN EVALUATED. SUCH OPERATION REQUIRES THE APPROVAL OF THE LOCAL AUTHORITY HAVING
JURISDICTION (AHJ).
NO
NO
NO
NC
NC
NC
C
C
C
+ - + -
P2
FDU-80
no connection
+24 VDC OUT
-24 VDC OUT
Earth Ground Option
+ -
NFS-640
TB7
Figure A.1 Power Wiring to the NFS-640
P2
FDU-80
no connection
+24 VDC OUT
-24 VDC OUT
Earth Ground Option
TB2
MPS-400 Power Supply
+ -
Figure A.2 Power Wiring to the AFP-300/400
