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Chapter 3
INSTALLATION AND REMOVAL OF THE COMMUNICATIONS CARD
Before starting installation and wiring, turn OFF the power and wait at least five minutes for inverters with a
capacity of 22 kW or below, or at least ten minutes for inverters with a capacity of 30 kW or above. Make
sure that the LED monitor and charging lamp are turned OFF. Further, make sure, using a multimeter or a
similar instrument, that the DC link bus voltage between the terminals P(+) and N(-) has dropped to the safe
level (+25 VDC or below).
Otherwise, an electric shock could occur.
• Do not use the product that is damaged or lacking parts.
Doing so could cause a fire, an accident, or injuries.
• Prevent lint, paper fibers, sawdust, dust, metallic chips, or other foreign materials from getting into
the inverter and the communications card.
Otherwise, a fire or an accident might result.
• Incorrect handling in installation/removal jobs could cause a failure.
A failure might result.
3.1 Installing the Communications Card
Before mounting the communications card, perform the wiring for the main circuit terminals and
control circuit terminals.
(1) Remove the front cover from the inverter and expose the control printed circuit board (control PCB). As
shown in Figure 3.1, the communications card can be connected to any one of the three option connection
ports (A-, B-, and C-ports) on the inverter.
To remove the front cover, refer to the FRENIC-MEGA Instruction Manual, Chapter 2, Section 2.3.
For inverters with a capacity of 30 kW or above, open also the keypad enclosure.
(2) Insert connector CN1 on the back of the communications card (Figure 2.1) into any of the A-port (CN4),
B-port (CN5), and C-port (CN6) on the inverter's control PCB. Then tighten the two screws that come with
the card. (Figure 3.3)
Check that the positioning cutout (shown in Figure 2.1) is fitted on the tab (
connector CN1 is fully inserted (
correctly mounted.
(3) Perform wiring on the communications card.
For details, refer to Chapter 4 "WIRING AND CABLING."
(4) Put the front cover back into place.
To put back the front cover, refer to the FRENIC-MEGA Instruction Manual, Chapter 2, Section 2.3.
For inverters with a capacity of 30 kW or above, close also the keypad enclosure.
in Figure 3.2). Figure 3.3 shows the communications card
8
in Figure 3.2) and
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