Fuji Electric Frenic Mini FRN001C1E-2U, Instruction Manual

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2-22
• Before installing an RS-485 Communications Card, turn off the power, wait more than five
minutes, and make sure, using a circuit tester or a similar instrument, that the DC link bus
voltage between the terminals P (+) and N (-) has dropped below a safe voltage (+25
VDC)
.
• Do not remove the terminal cover for the control circuits while power is applied, because
a high voltage exists on the RS-485 Communications Card.
Failure to observe these precautions could cause electric shock.
• In general, sheaths and covers of the control signal cables and wires are not specifically
designed to withstand a high electric field (i.e., reinforced insulation is not applied).
Therefore, if a control signal cable or wire comes into direct contact with a live conductor
of the main circuit, the insulation of the sheath or the cover might break down, which
would expose the signal wire to a high voltage of the main circuit. Make sure that the
control signal cables and wires will not come into contact with live conductors of the main
circuit.
Failure to observe these precautions could cause electric shock and/or an acci-
dent.
2.3.10 Replacing the control circuit terminal block (TB) cover
Upon completion of the wiring of the control circuits, fit the latches provided on the upper end of the
control circuit TB cover into the openings in the front face of the inverter, and then close the TB cover
as shown in Figure 2.21.
Note: Take care not to pinch the control signal wires between the TB cover and inverter body.
(*When connecting an extension cable for remote operation or an off-the-shelf LAN cable, snip off the barrier
of the RS-485 communications cable port using nippers.)
Figure 2.21 Putting Back the Control Circuit Terminal Block (TB) Cover