EP203 AUTOMATIC EXTINGUISHER PANEL
Approved Document No. DFU0002032 Rev 4 • EP203 AUTOMATIC EXTINGUISHER PANEL INSTALLATION MANUAL • Page 9 of 45
INSTALLATION AND WIRING
The E P 2 0 3 P anel Enclosure
The EP203 panel enclosure comprises of a plastic detachable lid and metal base unit
containing:
•
Main Control PCB - provides all the connections for the system’s detector circuits,
sounder circuits, monitored inputs and auxiliary outputs. It also provides the
engineer with access to a wide range of commissioning and engineering menus
•
Power Supply PCB - provides connections to the mains supply. It is switch mode
type, rated @230Vac, 50/60Hz that combines the functions of a power supply
unit, battery charging unit and battery monitoring unit
•
Output Expansion Relay Board (optional) - provides up to five volt-free relay
outputs.
The Main Control PCB is mounted on a metal bridge and the Power Supply PCB and
optional Output Expansion Relay Board are mounted in the metal base unit underneath
the Main Control PCB.
Removing the Lid and Bas e PCBs
To protect the electronics from damage and to expose the base mounting holes, the
panel’s lid and PCBs should be removed prior to first fix installation. See steps below.
An t i - s ta t ic ha n d l i n g g u i de l i ne s
Ensure that the following electro-static handling precautions are taken
immediately prior to handling the panel’s PCBs, or any other static-sensitive
components. Before handling any static-sensitive items, operators should rid
themselves of any personal electro-static charge by momentarily touching any sound
connection to safety earth, e.g. a radiator. Always handle PCBs by their sides and avoid
touching the legs of any components.
1.
Take the panel out of its packing box and undo the two lid screws using the Allen key
supplied in the accessory pack.
2.
Open the plastic lid, pull out the lid’s two fixing pins and take off the lid.
3.
Slacken the four M4 retaining nuts on the metal bridge and slide the bridge (and
mounted Main Control PCB) up and over the mounting pillars, taking care not to
damage any of the components.
4.
Disconnect the telecoms-style connecting cables from PL3 on the Power Supply PCB,
and from PL1 on the Output Expansion Relay Board (if fitted). Make sure that these
cables remain connected to the Main Control PCB to prevent them being misplaced.
Note : Care should be taken when detaching this connector to depress the locking tab
to prevent damage.
5.
Pull the Power Supply PCB’s earth strap (green/yellow) off the spade connector at the
main chassis earth point on the base unit.
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