FDU-80 Instruction Manual —
P/N 51264:C2 4/24/2019
15
Section 5: Electrical Connections
5.1 Power Connections
The FDU-80 Annunciator can be powered by the FACP (refer to the specific technical manual for the proper connection of the FDU-80)
or from a remote UL listed, filtered power supply such as the FCPS-24S6/8. The power run to the annunciator must be power-limited but
need not contain a power supervision relay since loss of power is inherently supervised through loss of communication with the annunci-
ator. 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, since the LCD backlight is turned off
during AC loss. Backlighting is turned back on during AC loss only for alarm conditions in the system. 12 - 18 AWG (0.75 - 3.25 mm
2
)
wire for 24 VDC circuit is acceptable. Power wire distance limitation is set by 1.2 volt maximum line drop from source to end of circuit.
5.2 Specifications for the FDU-80
•
Operating Voltage Range: 18 VDC to 28 VDC
•
Current Consumption @ 24 VDC nominal (filtered and nonresettable):
•
Normal/Standby (no activity): 64.3 mA
•
Trouble Condition: 64.3 mA
•
Alarm: 64.3 mA
•
AC Fail (not backlit): 25 mA
Refer to the illustrations on the following pages for FDU-80 connections to the FireWarden NFW2-100, NFS2-640, NFS-320, and
FCPS-24S6/8 .
NOTE:
These connections must be power-limited and the +24 VDC nominal power input must be filtered and nonresettable.
P2
FDU-80
no connection
+24 VDC OUT
-24 VDC OUT
Earth Ground Option
- +
NFW2-100
Figure 5.1 Power Wiring to the NFW2-100
P2
FDU-80
no connection
+24 VDC OUT
-24 VDC OUT
Earth Ground Option
+ -
NFS2-640/NFS-320
Figure 5.2 Power Wiring to the NFS2-640/NFS-320
