
B–63083EN/02
9. CONNECTION TO FANUC I/O Link
222
Most input signals for the source output type connection unit support a
sink type non–isolated interface. For some input signals, however, either
sink or source type can be selected. (European safety standards demand
the use of sink types.)
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
DICMN1
or
DICMN2
Machine Operator’s panel connection unit
+24V
+24V
0V
Contact
Input signal
Filter and level
conversion cir-
cuit
Receiver
output
signal
R
+24V
+24V
0V
DICMN1
or
DICMN2
Fig. 9.9.1(a) Receiver circuit
Always connect both DICMN1 and DICMN2 to 24 V or 0 V. Do not leave
them open.
9.9.1
Input Signal
Specifications for
Source Output Type
Connection Unit