EP203 AUTOMATIC EXTINGUISHER PANEL
Approved Document No. DFU0002032 Rev 4 • EP203 AUTOMATIC EXTINGUISHER PANEL INSTALLATION MANUAL • Page 19 of 45
SECOND FIX
Connecting the E P 2 0 3 P anel
CA UTI O N : D O N OT u se a h i g h v o l ta ge i n s u la t i on te s te r w i t h a n y e lect r o n ic
dev ices c on nected .
Check all devices on the detector and sounder circuits are correctly connected and that
cable integrity is verified throughout the installation. Faults occurring in the wiring,
which are not identified at this stage, will almost certainly result in spurious and
intermittent faults when the equipment is energised.
Installing the Powe r Supply PCB and Output Expansion Relay Board
W A RN I NG : W HEN C O N NECTED, THE P O WE R S UPPL Y P CB ST O RE S V O LT AGES
UP T O 400V dc A ND M A Y BE LETHAL I F T O U C HED. D O N OT T O U C H THE PC B
W H I L ST THE (H AZARD O U S V O LTA GES PRESEN T) RED LED I S L IT O N THE PC B .
The component layout of the Power Supply PCB is shown in Figure 12.
1.
Slide the Power Supply PCB over and downwards securing onto its mounting pillars,
taking care not to damage any of the components.
2.
Fix the two retaining screws on the Power Supply PCB. Do not overtighten the screws
otherwise their threads will strip.
3.
Attach the Power Supply PCB’s earth strap (Green/Yellow) to the spade connector at
the main chassis earth point on the base unit.
4.
If an Output Expansion Relay Board is fitted, carefully slide the board over and
downward securing onto its mounting pillars, taking care not to damage any of the
components.
5.
Fix the two retaining screws on the Output Expansion Relay Board. Do not
overtighten the screws otherwise their threads will strip.
Connecting the Mains Supply
The general requirement for the mains supply to this equipment is described on Page 12.
W A RN I NG : D O N OT ATTEMPT T O C O N NE CT THE MA I N S S UPPL Y T O THE
PO WE R S UPPL Y P C B U NT I L THE I N STA L LAT I O N I S C O MP LETE AND A L L P C B s
ARE SECU REL Y I N STA L LED I N THE EP203 PANEL .
The incoming mains cable should enter the EP203 panel through the knockouts at the
top right hand side of the enclosure and terminated at the connector block (CONN1) on
the Power Supply PCB. Make sure the mains earth wire is connected directly to this
connector block and NOT to the secondary base earth post (which is provided for
connecting detector and sounder circuit screens).
The Power Supply PCB’s earth strap MUST be connected to the spade on the chassis
earth post before operation.
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