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NCi-6 basics
Introduction
CNC machine tools using Renishaw NC4, NC4+ or NC4+ Blue non-contact (NC) units for tool setting
or broken tool detection require an interface unit . The NCi-6 unit converts signals from the NC unit into
voltage-free, solid-state relay (SSR) outputs for transmission to the CNC machine control .
The NCi-6 interface unit should be installed in the CNC control cabinet . Where possible, site the unit away
from potential sources of interference such as transformers and motor controllers .
CAUTION: Only qualified persons should install and adjust switches on the interface. Remove the DC
power supply from the NCi-6 unit before removing the cover .
Power supply
The NCi-6 interface can draw its power from the CNC machine's nominal 12 Vdc to 24 Vdc supply. This
must be an appropriate single fault tolerant power supply which must comply to BS EN IEC 62368-1 .
The supply to the NCi-6 is protected by a 0 .5 A resettable fuse . To reset the fuse, remove the power then
identify and rectify the cause of the fault .
The nominal current when connected to an NC unit is as follows:
120 mA @ 12 Vdc,
70 mA @ 24 Vdc
NOTE: To disconnect the power supply, remove the wires from the terminals .
Input / output over-current protection
Each of the SSR outputs is protected by a 50 mA resettable fuse .
The auxiliary relay output is protected by a 200 mA resettable fuse .
The NC unit is protected by a resettable current protection circuit .
www.renishaw.com/nci-6
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