EP203 AUTOMATIC EXTINGUISHER PANEL
Approved Document No. DFU0002032 Rev 4 • EP203 AUTOMATIC EXTINGUISHER PANEL INSTALLATION MANUAL • Page 21 of 45
Installing the Main Control PCB
The connections to the panel’s Main Control PCB are shown in Appendix 2.
Note : Before any connections are made, the Main Control PCB and Output Expansion
Relay Board (if fitted) must first be securely mounted inside the base unit.
1.
Slide the metal bridge (and mounted Main Control PCB) over and downwards securing
onto its mounting pillars.
2.
Secure the metal bridge in the base unit using the four M4 retaining nuts, taking
care not to damage any of the components. Do not overtighten the nuts otherwise
their threads will strip.
3.
Connect the Main Control PCB’s telecoms-style connecting cables to PL3 on the Power
Supply PCB and to PL1 on the Output Expansion Relay Board (if fitted).
Note : Care should be taken when attaching this connector to depress the locking tab
to prevent damage.
Connecting Circuits to the Main Control PCB
Incoming detector and sounder circuits, monitored inputs, auxiliary outputs, extinguisher
circuits, RSUs and ESUs are be connected to the relevant connector block on the Main
Control PCB as shown in Appendix 2. For typical circuit wiring diagrams refer to the First Fix
section of this manual. See note below regarding earthing of screens.
I m p or ta nt n o te s re ga r d i n g t he ea r t h i n g o f sc reen s
All screens should be adequately insulated
and connected between the nut and
washers on the base earth post (see right)
using suitable eyed crimp connectors.
Do not disturb the lower nut, this must be secure to
ensure earth continuity. The base earth post is
provided for terminating earth screens, or drains and
not as the main earthing point. The system designer,
or installer must review the external earth bonding
(if required) with respect to the national wiring rules. That is, if the type of installation
requires protective earth bonding, then this must be applied externally and in
conjunction with the type of earthing system employed on that particular site.
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