22
C420 Installation Manual
5 INPUTS AND OUTPUTS
5.1 AUXILIARY POWER SUPPLY UNITS INPUTS
The control panel is equipped with 2 inputs used to connect 24V
⎓
auxiliary power supply units which can power on the control
panel if the AC mains is missing. This feature is useful when the AC mains is missing and the control panel is required to work for
long time.
In order to user the auxiliary power supply units inputs, the following conditions must be fulfilled:
•
Both inputs must be used simultaneously
•
The internal batteries of the control panel must be connected
•
The JP3 jumper (5-6 pins) on the CPU board must be inserted
•
The external power unit control input (CTRL PS + and -) must be used to monitor the operation of the power units
themselves. These terminals must be connected to the NC contact of a fault relay with which the auxiliary power units
should be provided.
•
NOTE: If the auxiliary power units are not provided with fault indication by means of NC contact of a relay, the CTRL PS +
and – terminals must be short-circuited using the soldered wire jumper provided. However, in this case, the power units
will not be monitored and the fault will only be indicated if the EXT PS1 (+ and -) and EXT PS2 (+ and -) inputs are
disconnected.
When this functionality is used, the lack of power supply in one of the two inputs leads to a fault signalling.
NOTE
:
if no auxiliary power units are used: jumper JP3 in position 5-6 must not be inserted and the CTRL PS + and - terminals
must always be short-circuited with the soldered wire jumper.
5.2 SIREN OUTPUT
The control panel is equipped with a supervised siren output for alarm signalling.
This output is constantly monitored by the control panel and, if the connection with the siren is interrupted or undergoes a short
circuit, a fault is notified by the control panel. When the control panel is in alarm condition, the siren output can be silenced and
rearmed.
The siren output can be excluded. In such a condition, this output is neither activated nor supervised.
The supplementary siren outputs available on the optional module MR420 are handled exactly like the siren output available on the
control panel.
If an available siren output is not used, the end of line 3300
Ω
resistor must be connected to the relevant terminals.
5.3 SIGNALLING RELAYS
5.3.1 Fault relay
The control panel is equipped with a dry contacts relay used to signal the fault events as described below:
•
The control panel is powered on and no fault event is active
the relay is active
•
The control panel is powered on and there is at least one fault event active
the relay is deactivated
•
The control panel is powered off
the relay is deactivated
The silk screen on the board indicates the condition of relay deactivated.
5.3.2 Programmable relay
The control panel is equipped with a dry contacts programmable relay output which can be used to signal active exclusions or the
lack of AC mains. In the latter case, a delay can be associated to the signalling.
Please, refer to the programming manual for further information.
5.3.3 Siren relay
The control panel is equipped with a dry contacts relay output which is activated when the siren output is activated as well.
Once activated, the siren relay keeps being activated even if the siren output is silenced.
5.3.4 Alarm relay
The control panel is equipped with a dry contacts relay output which is activated when the control panel switches to alarm condition
with siren output OFF or ON.
