TM204
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Issue 1.1
5.7
Aux 24V DC Supply Output – Extinguishing Module
The terminals for the Aux 24V supply are labelled Aux 24V + and R0V. The R0V terminal is the negative
terminal.
It is possible to have the Aux24V supply outputs removed for a few seconds when the panel is reset.
Aux 24V not removed upon reset is set as default on the extinguishing modules. To change this, switch
the system to Access Level 2 by operating the enable control keyswitch and then operate the
extinguishing module WRITE ENABLE switch by gently sliding it to the left.
The LCD will show:
Press the ENTER button and then the (+) repeatedly until the LCD displays:
Press the ENTER button. The LCD will show:
Press the ENTER button. The LCD will show:
Press the EXIT button.
The Aux 24V supply outputs are fitted with an electronic, self resetting fuse rated at 0.5 Amps to protect
the control panel’s 24V supply in the event of a wiring fault.
Any standing load on the Aux 24V supply outputs must be taken into account when calculating battery
standby times. Standby times will be significantly affected by even modest standing loads on these
outputs. It is recommended that the Aux 24V outputs are not used to power standing loads.
Where the Aux 24V supply outputs are used to power electromechanical devices such as relays or door
retainers it is imperative that a suppression diode is fitted across the coil of the device to prevent the
generation of high voltage transients back to the control panel power supply.
5.8
Connection to Relay Contacts
Volt free changeover relay contacts are provided for local control and signalling if required. These
contacts are rated for switching signalling circuits only and the maximum ratings listed in Table 1 –
Electrical specifications, should not be exceeded under any circumstances.
Typically, the Aux 24V outputs of the control panel are switched through these relays and used to control
other systems.
