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Chapter 3 INSTALLATION AND REMOVAL OF THIS 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 the A-port only, out of three option
connection ports (A-, B-, and C-ports) on the control PCB.
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 the A-port (CN4) on the
inverter's control PCB. Then secure the communications card with 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 ( in Figure 3.2) and
connector CN1 is fully inserted ( in Figure 3.2). Figure 3.3 shows the communications card correctly
mounted.
When the SX-bus communications card is mounted, the B-port can accept only the relay output
interface card.
(3) Perform wiring to 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.
Figure 3.1 In the case of 0.4 kW
Summary of Contents for OPC-G1-SX.
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