6
Pre-alarm relay (FLT).
This status is signalled by switching on the yellow LED ' ',
by switching on the red LED corresponding to the input to
which the transmitter that detected the abnormal event is
connected and by the activation of the buzzer with
continuous sound.
The control unit continues to supervise the system.
BACK-UP SYSTEM
To guarantee the highest safety level, the control unit can
be powered through an external 12Vdc power supply unit
with buffer battery that assures operation even in case of a
black-out.
In this case, the power supply LED '~' is always off.
For the electrical wirings please read the paragraph
'Electrical connections'.
PERIODIC CHECK
We recommend periodically checking the proper operation
of the entire detection system, control unit + transmitters, by
applying gas to each transmitter and checking the displayed
value.
Refer to the regulation in force in the country of installation.
INSTALLATION
Carry out the operations below to install the device:
-
Remove the 6 screws indicated in Fig. 1 and remove
the front panel.
-
Fix the device base to the wall using the two holes for
screws indicated in Fig. 2
Carefully check that the circuit is disconnected from
the 230V~ power mains while working with tools near
the electric parts, and make sure not to damage the
circuit or the surrounding components.
-
Make the electric connections as indicated in the
paragraph 'Electric connections' in accordance with the
diagrams in Fig. 4 and Fig. 5.
-
The cables can be introduced in three ways:
Cables enter from rear :
Using a screwdriver, remove the base wedges as
indicated in Fig. 2. Now introduce the cables through
the openings in the base, up to the clamps.
Cables enter from the lower edge (slots between lid and
base) :
Using suitable pliers, remove the plastic tooth
indicated
by the arrow in Fig. 3 and, after having connected the
cable to the proper clamp, bend it as indicated in Fig. 3,
lock the cables using the specific cable clamps.
Cables enter from the lower edge (cracks on base) :
Pass the cables through the lower slots of Fig. 3.
Connect the cables to the right clamps and lock the
cables with the specific cable clamps.
-
Close the device by placing the front back on the
container and fixing the six fastening screws.
ELECTRICAL CONNECTIONS
Carefully read below and compare with the wiring diagram
of Fig. 4 showing the disposition of the terminals, the
internal circuit and the connections with the external
components.
The control unit can be powered with 230V~ through
terminals L and N (making sure terminal N is connected to
Neutral) or with 12Vdc connecting an external power supply
unit with buffer battery to the 'BATTERY' terminals (respect
polarity).
Warning: the control unit does not supply current to the
'BATTERY' terminals (it does not charge the battery wired
to it).
Should the control unit and the connected transmitters be
GENERAL INFORMATION
This device is a gas control unit equipped with 3 Outputs
with exchange contacts (pre-alarm, alarm and fault relay)
able to configure and control up to 8 gas concentration
transmitters, carbon monoxide (CO), Methane, Petrol
vapour and L.P.G., with 4..20mA output.
The control unit and transmitters' status (normal operation,
pre-alarm, alarm or fault) will be shown through the LEDs
on the front.
START-UP
OUTPUTS SWITCH-ON AND ACTIVATION
LED '~' o ' ' flashes for 50 seconds indicating the pre-
heating phase of the transmitters, upon application of power
supply, based on the applied power supply.
The Pre-alarm, Alarm and Fault outputs are deactivated
during this phase.
LED '~' o ' ' remains on with permanent light after the
pre-heating time.
Activating the outputs is characterised by switching on the
'RDY' LED, in accordance with the set-up made on
connector JP4 (see page 3).
RESET KEY ( of Fig. 1)
The use of this key located on the front (Fig. 1) depends on
the 'LATCH' dip-switches made set-up and of connector
'JP4' (see paragraph 'JUMPER AND DIP-SWITCH
SET-UP').
If enabled, keeping it pressed for at least 5 seconds in
either case restores the control unit to normal operation
after an abnormal event or black-out.
ACOUSTIC SIGNALS
The control unit is fitted with an internal buzzer allowing it to
emit acoustic signals should an abnormal event be
detected. The user cannot exclude the acoustic signals.
TRANSMITTERS STATUS DISPLAY
By switching on LEDs from 1 to 8, together with LEDs
' ' on the front cover, the control unit signals the
status of the connected transmitters.
The LED number corresponds to the relative CH- output
number (e.g. LED 1 corresponds to output CH1).
Pre-alarm Status (' ' red LED on)
This status is activated if a transmitter sends a greater gas
concentration level than the set Pre-alarm threshold.
Activating the Pre-alarm status activates the Pre-alarm
relay (PRE).
This status is signalled by switching on the red LED ' ', by
switching on the red LED corresponding to the input to
which the transmitter that detected the abnormal event is
connected and by the activation of the buzzer with
intermittent sound.
The control unit continues to supervise the system.
Alarm Status (' ' red LED on)
This status is activated if a transmitter sends a greater gas
concentration level than the set Alarm threshold. Activating
the Alarm status activates the Pre-alarm relay (ALR).
This status is signalled by switching on the red LED ' ', by
switching on the red LED corresponding to the input to
which the transmitter that detected the abnormal event is
connected and by the activation of the buzzer with
continuous sound.
The control unit continues to supervise the system.
Fault Status (yellow LED ' ' on)
This status is activated if a transmitter sends a Fault signal
to the control unit. Activating the Fault status activates the
RXA01M0001SE 031134 141118
8
2
7
7
8
6
6
1
A
RXA01M0001SE 031134 141118
3
JUMPER AND DIP-SWITCH SET-UP
JP1 Connector - Fault relay logic set-up
D
JP1
FLT
NOR
REV
NORmal relay logic (default).
COM - N.O.: normally open.
COM - N.C.: normally closed.
JP1
FLT
NOR
REV
REVersed relay logic.
COM - N.O.: normally closed.
COM - N.C.: normally open.
JP2 Connector - Pre-alarm relay logic set-up
E
JP2
PRE
NOR
REV
NORmal relay logic (default).
COM - N.O.: normally open.
COM - N.C.: normally closed.
JP2
PRE
NOR
REV
REVersed relay logic.
COM - N.O.: normally closed.
COM - N.C.: normally open.
H
Connectors for enabling the CH1 .. CH8 inputs
Each input is fitted with a connector that, if adequately
set, enables or disables the relative input. Should an
input be unused (is not connected to a transmitter) it
must be disabled, otherwise the control unit will signal
an alarm status for that input.
These connectors are placed above the terminals of
the relative input (see figure).
JP--
INH
ACT
Channel disabled - INH - (default).
INH
ACT
Channel enabled - ACT -.
JP--
G
JP4 Connector:
Power Up set-up
Sets the method of activation of the outputs (pre-alarm,
alarm and fault) upon application of power supply or
after a black-out.
The outputs are automatically enabled after
the pre-heating time.
PWR
UP
OFF
ON
PWR
UP
OFF
ON
The outputs are enabled after the pre-
heating time, only if the operator presses
the 'reset' key for about 5 seconds.
Set this mode if human intervention is
requested to reset operation after a black-
out.
Switching on of the green LED 'RDY' located on the
front, indicates that the outputs are active and the
control unit ready to control the entire system.
JP3 Connector - Alarm relay logic set-up
F
JP3
ALR
NOR
REV
NORmal relay logic (default).
COM - N.O.: normally open.
COM - N.C.: normally closed.
JP3
REVersed relay logic.
COM - N.O.: normally closed.
COM - N.C.: normally open.
ALR
NOR
REV
D
E
F M
Fig. 6.
LG
H
I
F1
F2
