HEIDENHAIN iTNC 530 Service Manual page 255

An MC 42x (B/C) can also be connected to a UV 106 (B/C) instead of a CC 42x controller unit.
Power supply by
Thus the control loops for digital axes and spindles are not required. --> This combination is
UV 106 (B)
solely destined for analog axes and spindles.
The phases U and V are connected via a connector on the front panel.
The LED READY UV on the front panel indicates the readiness of the unit.
The MC is powered by means of a connecting board on the rear side of the unit.
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