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

B–62753EN/01
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
115
Most input signals for the source output type connection unit support a
sink type (0–V common) non–isolated interface. For some input signals,
however, either sink or source type can be selected. (Note, however, that
safety standards require the use of the sink type.)
The machine’s contacts shall conform to the following specifications:
Capacity: 30 VDC, 16 mA or higher
Intercontact leakage current in closed circuit:
1 mA or less (at 26.4 V)
Intercontact voltage drop in closed circuit:
2 V or less (including the voltage drop in the cables)
Contact
Input signal
Filter and level
conversion cir-
cuit
Receiver
output
signal
R
Operator’s panel connection unit
Circuit of sink type input receiver
+24V
+24V
Machine
Contact
Input signal
Filter and level
conversion cir-
cuit
Receiver
output
signal
R
Circuit of input receiver for which common voltage can be selected
DICMN
Machine Operator’s panel connection unit
+24V
+24V
0V
Contact
Input signal
Filter and level
conversion cir-
cuit
Receiver
output
signal
R
DICMN
+24V
+24V
0V
Fig. 6.6.1 (a) Receiver circuit
6.6.1
Input signal
Specifications for
Source Output Type
Connection Unit

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