4-13
www.renishaw.com/nc4
LED
colour
Signal
voltage
Tool set mode 1 Tool set mode 2
Description
Green/
amber
> 6.0 V Flashing at 1 Hz.
The system operating voltage is too high.
The system will continue to function,
but for optimum performance repeat the
set-up and alignment procedures.
The system is untriggered.
Flashing at 1 Hz.
The system operating voltage is too high.
The system will continue to function,
but for optimum performance repeat the
set-up and alignment procedures.
The system is triggered.
Green 6.0 V to
4.0 V
The beam is clear.
The system is untriggered.
The beam is clear.
The system is triggered.
Amber 4.0 V to
2.5 V
The beam is partially blocked.
The system is untriggered.
The beam is partially blocked.
The system is triggered.
Red 2.5 V to
0.0 V
The beam is blocked.
The system is triggered.
The beam is blocked.
The system is untriggered.
No
light
0.0 V No power to the unit.
LED colour High speed broken tool detection mode Latch mode
Green/amber Not applicable. Flashing at 1 Hz.
The output is not latched.
The system operating voltage is too high.
The system will continue to function,
but for optimum performance repeat the
set-up and alignment procedures.
Green Not applicable. The beam is clear.
The system is not latched.
Amber The output is not latched.
The beam is blocked.
Red The output is latched.
The tool is broken.
The output is latched.
No light No power to the unit.
The status LEDs can be used for diagnostic purposes, as the NC4 system constantly checks for signal
and indicates the state of the system by the colours of the LEDs. If the laser beam is clear and the LEDs
are either amber or ashing green/amber, this indicates that servicing is required. The system will continue
to function as normal. For more information, see page 5-1, “Fault-nding”.