10   IO-Link Master Unit
10 - 12
GX-series EtherCAT Slave Unit User’s Manual
*1 I/O power supply to devices:
This is the voltage and current value supplied to devices when the communications modes of the ports on the 
IO-Link Master Unit are IO-Link Mode or SIO (DI) Mode. Check the power consumption of the connected 
device and supply the power from the I/O power supply to the IO-Link Master Unit.
Circuit layout
Installation orientation and restrictions
Installation orientation: 6 possible orientations
Restrictions: No restrictions
Protective functions
•
Short-circuit protection for L+ terminal
• Short-circuit protection for C/Q terminal
Item Specification
IN communications 
connector
OUT communications 
connector
Power 
supply 
connector
Unit power supply 
24 V
Unit power supply 
0 V
I/O power 
supply 24 V
I/O power 
supply 0 V
Internal 
circuits
I/O 
connector 
1
I/O 
connector 
8
L+
C/Q
DI
L-
L+
C/Q
DI
L-
Non-isolated 
power supply 
circuits
Non-
isolated 
power 
supply 
circuits
IO-Link 
circuits
Isolation 
circuit