Hitachi SJ700-2 instruction manual Appendix, Upgrading from the SJ300 Series

Appendix

Upgrading from the SJ300 Series

The SJ300 series inverter is upwardly compatible with the SJ700 series inverter. Therefore, you can:

-mount the control circuit terminal block board of the SJ300 series in the SJ700 series without removing the connected cables,

-copy the parameter settings from the SJ300 series into the SJ700 series, and

-use the option boards mounted in the SJ300 series for the SJ700 series without removing the connected cables.

(1)Control circuit terminal block board You can mount the control circuit terminal block board of the SJ300 series into the SJ700 series. Note, however, that the backing plate is incompatible.

(Procedure for replacing the control circuit terminal block board)

As shown in the figure on the right, the fixing screw locations on the control circuit terminal block board are common to the SJ300 and SJ700 series.

To remove and install the control circuit terminal block board, follow the steps 1) to 5) described below.

Control circuit terminal block board mounted in the SJ300/SJ700 series (front view)

Fixing screw (M3) x 2		Board guide pin x 2
Board guide pin		Board guide pin
Fixing screw	Connector	Fixing screw
	(60 poles)

Precautions:

Use care to prevent the control circuit terminal block board from twisting when removing or mounting it. Otherwise, the board guide pins and connector pins may be damaged.

Do not pull the cables connected to the control circuit terminal block board when you remove the board from the SJ300 series.

Do not forcibly insert the board into the mounting slot. Make sure that the board is correctly fitted onto the board guide pins and the connectors are correctly fitted to each other.

SJ300 series

Removing the control circuit terminal block board from the SJ300 series

1)Remove two fixing screws from the control circuit terminal block board.

2)Pull the control circuit terminal block board straight toward you to remove it from the SJ300 series.

Precautions:

Pull out the board slowly.

Be careful not to bend the connector pins. Be careful not to break the board guide pins.

SJ700 series

Mounting the removed control circuit terminal block board in the SJ700 series

3)Remove the original control circuit terminal block board from the SJ700 series beforehand (as instructed in steps 1) and 2)).

4)Insert the control circuit terminal block board removed from the SJ300 series straight into the slot along the board guide pins and connector pins until it touches the fixing-screw seats.

Precautions:

Push in the board slowly.

Be careful not to bend the connector pins. Be careful not to break the board guide pins.

5)Secure the control circuit terminal block board with two fixing screws.

Precaution:

Be sure to fix the board with the two fixing screws.

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