93-331-73 Issue 2 Page 9 of 32 © Protec Fire Detection PLC 2013
5) Refitting of the Main Board
NOTE: Do not over-tighten any screws.
Refit the power supply insulation sheet over the PCB mounting pillars.
Replace the main PCB and refit the five posidrive screws. Ensure the top right screw includes
a metal star washer to maintain earth connectivity.
Reconnect the 16-way ribbon cable from the display board, and reconnect the supplementary
earth connection to the mains input terminal block.
6.0 Testing of Cabling Prior to Connection
Before connecting any external cables to field device (detectors, sounders, auxiliary inputs or outputs),
or the 3200, tests must be carried out using a 500V dc insulation tester (Megger
TM
). The readings
between each cable core, and each core and earth should be greater than 10MΩ.
Important Notes:
• Equipment connected to the cabling during insulation tests could be damaged with the high
voltages produced during the test.
• Field devices and the 3200 MUST NOT be connected when high voltage insulation tests are being
performed on the cabling.
• The cabling must be completely discharged prior to connection to any field devices or the 3200.
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