Page 27 of 97
Title FireVu Detector Standalone Installation Manual
NetVu Ltd.
No 1 Thellow Heath Park, Northwich Road, Northwich, Cheshire. CW9 6JB
Relay-1A
Relay-2
JUMPER
Normal
Loop
Terminal
Block
Relay-1B
Relay-3
JUMPER
Normal
Loop
Terminal
Block
With the jumper in the “Normal” position the position of relay 1 (open or closed) is irrelevant as it’s
contacts are shorted out by the jumper. This means that relays 2 and 3 will work normally and their
position (open or closed) will be repeated on the terminal block for those relays.
With the jumpe
r in the “loop” position the position of relay 1 also has an effect on the state of the
output at the terminal block. If relay 1 is closed then the position of relays 2 and 3 (open or closed)
will be repeated on their terminal blocks. If relay 1 is open the terminal block status will be open,
regardless of the position of relays 2 and 3.
Relay one can be programmed or controlled by the fault status of the detector (including cable
faults measured on the terminal blocks of relays 2 and 3 if the jumpers are
in the “Loop” position).
If normal relay operation is desired and somehow the jumpers have become lost then relays 2 and
3 can be made to work normally by setting relay 1 to permanent normally closed.
The practical effect of the above is that relays 2,3,4 & 5 should be used to signal smoke/flame high
temperature using the
Individual Zones Configuration
page of the detector.