Scientifica MDU - 5.0 Electrical setup; 5.1 Electrical setup - controller connections

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5.0 Electrical setup
5.1 Electrical setup - controller connections
 Mount the controller in a suitable 19-inch rack. It may be necessary to connect a ground strap from the
lug at the rear of the controller to the optical table or to another suitable grounding point depending on
the local screening arrangements. Ground straps are best made from short, wide sections of copper
braid (like the sheath of large-diameter coaxial cable).
 Route the screened control cables from each detector module around the microscope in a convenient
manner and bring them to the rear of the controller.
o Remember that the detection module must be free to move in the vertical direction when the
microscope is focused. Ensure that the cables are sufficiently slack to permit this motion and
that they will not interfere with any other equipment in so doing.
 Connect each control cable into one of the 8-pin mini-DIN sockets marked “PMT A” or “PMT B”. The
order is not critical. Ensure that both plugs are pushed fully home.
o It may be convenient to add colour-coded sleeves onto each cable to identify the two detectors
individually.
 Connect a shielded signal cable to the SMA socket on each detector module, ensuring that the SMA
plug is fully hand-tight. Route the cables to the data acquisition system in such a way that they will not
foul any other equipment whilst moving. Again, it may be useful to place identification labels on the
cables.
 Configure the power supply unit to suit the local mains plugs and plug it into a suitable mains supply
but do not turn the mains supply on yet. Ensure that the main power switch on the front of the
controller is off – the large silver push button on the left of the front panel should not be depressed.
Connect the 2.5 mm DC coaxial “barrel” connector into the socket on the rear of the controller.
o Note that the supply voltage must be 12V DC, and that the central pin is positive.
o If an alternate power supply is used, it should be of very low noise design to prevent
interference with sensitive electrophysiology amplifiers.
 Check that the “Safe / Enable” toggle switch on the front panel of the controller is in the “Safe”
(upward) position. If this is not the case, pull the toggle outwards and raise it to set the safe
condition.