Hyfire Wireless Fire Solutions Limited
-
Unit B12a, Holly Farm Business Park, Honiley,
Warwickshire, CV8 1NP
-
United Kingdom
www.hyfirewireless.com
L20
-
VMICX
-
1400 (vA.1Q)
THE SUPERVISED OUTPUT CHANNEL AND ITS WIRING
This channel (picture 12) provides control of external, loop
-
unrelated auxiliary devices such
as fire shutters; it performs two main functions:
a) supervises the connection to the controlled external load through an
“
end of line
”
resistor
(R
EOL
)
b) supervises the presence of an external power supply for the output.
The purpose of the supervision functionality of this channel is to distinguish between the
following conditions:
a) Normal condition.
b) Short circuit fault condition on the load
’
s
“
loop
”.
c) Open circuit fault condition on the load
’
s
“
loop
”.
d) External power supply shortage fault condition; this can be caused by a short or open
circuit on the power supply
“
loop
”,
or by the V
EXT
value under a certain threshold.
THE FORM C OUTPUT CHANNEL AND ITS WIRING
This output channel provides relay
’
s double pole contacts changeover for the
control of auxiliary devices (picture 13 illustrates a wiring example). This non
-
supervised form C output is controlled and can be switched over by the
control panel.
This channel type is characterized by 3 terminals:
a) C:
“
common
”
terminal
b) NC:
“
normally closed
”
terminal
c) NO:
“
normally open
”
terminal
By default, C is switched over the NC terminal; when activated, C is switched
over the NO terminal.
Please note that due to the non supervised nature of this output, only techno-
logic devices can be connected to it (fire shutters hold / release devices and
so on).
TESTING
In order to try out the functionality of the installed multi
-
module, the following tests must be performed:
All active output channels
-
alarm test:
trigger an alarm condition on the control panel (by a call
-
point or sensor in the installed system):
the control panel will activate or switch
-
over the multi
-
module
’
s output (or outputs).
All active input channels
-
alarm test:
activate the external device: the control panel must trigger a system alarm.
All active supervised input and output channels
-
fault tests:
generate open and short circuit conditions on the supervised channel
’
s
loops: the control panel must signal one or more fault conditions.
After each test the device must be reset by the specific command on the control panel (see the RESET paragraph).
All devices must be tested after installation and, successively, on a periodic basis.
RESET
To reset the multi
-
module from an alarmed or a fault condition, it is necessary to:
1) solve the cause of the abnormal condition
2) reset the system from the control panel.
Picture 13
-
form C output channel
’
s wiring
NO
C
NC
LOAD
LOAD
Output channel
Picture 12
-
supervised output channel
’
s wiring
External power (
-
)
External power (+)
Channel
’
s output (
-
)
Channel
’
s output (+)
R
EOL
V
EXT
-
+
LOAD
Diode
