Honeywell Fire-Lite FL-PS6 Instruction Manual page 20

Installation
Ground Fault Detection
When connected to an FACP, the host FACP must monitor for all ground fault conditions.
There are three ways to monitor for ground faults when cascading multiple power supply units (up to four).
The negative (-) battery terminal of the FL-PS power supply must be connected to the negative (-) battery terminal of the host
FACP. Battery wiring is non-power-limited. Power-limited and non-power-limited wiring must be wired with a minimum of
0.25" spacing in between and enter/exit through different knockouts. When cascading multiple power supply units, continue
connecting the negative battery terminals, including FACP battery terminal. Ground faults must then be detected by the first
FL-PS in the chain. Disable ground fault detection on other FL-PSunits by sliding SW1 to the left. Ensure ground fault detection
is enabled on FL-PS1, the first power supply from the FACP, by sliding SW1 to the right. 18 AWG wire minimum must be used.
to next
negative
battery
terminal
TB4
SW1 ground fault
detection switch
TB15
Battery -
20
wire nut, ground
Power Supply
cables, and
ground stud
NO NC C NO NC C NO NC C
optional
ZNAC-PS
converter
card
Figure 2.14 Canadian Applications Option 1
NAC1
AUX1
NAC2
AUX2
Battery -
FL-PS Series Instruction Manual — P/N LS10227-001FL-E:B 3/29/2021
Canadian Applications
Host FACP