8 Installation Manual
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W
IRING
The fiber optics cables are vulnerable. Sharp bending can damage them. The minimum bending
radius can be between 15 cm and 25 cm approximately, depending on the type and the material
of the cable. For details see the datasheets of the fiber optics cables to be installed. The fiber
shall not be twisted or bent. When connecting or disconnecting the cable always hold the
connector, not the cable.
3.5.4 Removing and changing modules
Before removing and changing modules first the power supply voltage of the device shall be
disconnected. Then all the energizing quantities connected to each module of the device shall be
disconnected. Before removing the connectors of the CT modules, the CT circuits shall be short-
circuited and disconnected.
The protective earth connection can be disconnected last if it is necessary (e.g. when removing
a Power supply module).
The devices contain components that are sensitive to electrostatic discharges. ESD wrist strap
shall be worn during any operations with modules.
Some of the modules can operate at high internal temperatures. Remove these modules carefully
to avoid any burn injury. Take care of the possible high temperature at each module.
The modules have got sharp edges. Remove them carefully to avoid injury.
After changing a module, it shall be fixed with the screws provided with a torque of 0,5 Nm. Use
Philips 2 screwdriver.
4 Wiring
4.1 Tools for connecting
Screwdrivers for the connectors: blade 0,6/3,5 mm, 0,4/2,5 mm.
Cutter, stripper, crimper tools to prepare the connecting end of the wires.