Omron TJ2-MC02 Hardware Reference Manual page 257

Hardware reference
The maximum I/O current consumption is 4 A.
1. Calculate the total current consumption used by all external I/Os of the
connected SmartSlice I/O Units (including other units like Turnback
Units). Refer to the GRT1 Series SmartSlice I/O Units Operation Manual
(W455) for the current value for each SmartSlice I/O Unit.
2. If the current consumption exceeds 4 A or if you want to provide
separate systems for inputs and outputs, divide the SmartSlice I/O Units
at the desired point with a GRT1-PD_(-1) I/O Power Supply Unit and
provide a separate external I/O power supply.
Note
It is also possible to provide a separate external I/O power supply
at a Left Turnback Unit (GRT1-TBL).
Note
Make sure the power supply is isolated.
Note
The GCN2-100 Turnback cable does not supply power.
HARDWARE REFERENCE MANUAL 251