Control units of the drive
Contents of this chapter
This chapter
• describes the connections of the control unit(s) used in the drive,
• contains the specifications of the inputs and outputs of the control unit(s).
General
The ZCU-14 control unit is used with inverter module frame sizes R1i…R4i, R6i and R7i,
while the ZCU-12 is used with frame size R5i. Both ZCU units consist of a ZCON control
board contained in a plastic housing. The control unit is mounted on the inverter module.
The BCU-x2 control unit is used with frame size R8i and multiples. The BCU-x2 consists of
a BCON-12 control board (and a BIOC-01 I/O connector board and power supply board)
built in a metal housing. The control unit is connected to the inverter module(s) by fiber optic
cables.
In this manual, the name “BCU-x2” represents the control unit types BCU-02, BCU-12 and
BCU-22. These have a different number of power module connections (2, 7 and 12
respectively) but are otherwise similar.
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Control units of the drive 297
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