FANUC Series 16/18/160/180-Model C Connection Manual (Hardware)

6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B–62753EN/01
118
Note
The above red LED and alarm transfer to the CNC are
supported by PCBs of version 03B and later.
If the output of a signal cannot be turned on even though the CNC
diagnostic indicates that the signal is on, that signal or another signal
being handled by the same element may be overloaded, thus causing the
eight output signals to be turned off. In such a case, turn the system power
off and eliminate the cause of the overload.
CONTROL
LOGIC
OHD
DOCOM
IN#0
OCD
OUT#0
CONTROL
LOGIC
IN#1
OCD
OUT#1
CONTROL
LOGIC
IN#7
OCD
OUT#7
OHD: Overheat detection circuit
OCD: Overcurrent detection circuit
The power for operating this driver element is supplied from
DOCOM (24 VDC).
Driver element block
diagram

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