INSTALLATION INSTRUCTIONS
Hydrosense ID Addressable Water Detection System
Document Part No. 3500039 Issue:01
Page | 15 of 32
10. Detection circuits
Hydrosense ID control panels are configured to communicate using only Hydrosense ID loop components.
Power is driven from the “LOOP OUT” terminals and is returned to the “LOOP IN” terminals, where it is monitored
for detection loop continuity.
If the loop is open-circuit (a cable fault or short circuit isolator operated), the panel will drive power from both
the “LOOP OUT” and “LOOP IN” terminals. This ensures that despite a single break or short circuit in the wiring,
all of the devices will still remain connected to the control panel. In the case of a short circuit, the short circuit
isolators will isolate the faulty section of the wiring and the panel will report devices between the isolators as
missing.
Both the “LOOP OUT” and “LOOP IN” connections of the panel are fitted with short circuit isolation so that a short
on the cable between these terminals and the first isolator fitted to the detection circuit will be isolated, leaving
the remainder of the circuit operational.
Detection loops should be wired in a screened 2-core cable and terminated at the panel using brass cable glands.
Detection loops should have the drain wire terminated at the cable gland, as described in
Section 4.1
