Configuring the Digital I/O Power Terminal (TBPWR)

VIO and GIO are power sources used for the digital I/O of the safety controller located in the front of the controller, and are separated from VCC24V and GND supplied by SMPS inside the controller. If the user uses a current of 2A or less for the configurable digital I/O and does not require insulation between the connected I/O device and controller, the internal power supply of the controller can be used as the I/O power supply, as shown in the figure below. (factory default setting)

If a current greater than 2A is required, it is necessary to connect a separate external power source (24V) to the VIO and GIO terminals.

When the VIO power is supplied, the “IOPW (green)” LED on top of the TBPWR block lights up.

Caution

• When turning off the power for the controller, be sure to turn off the external power source (SMPS).

Note

• If a current greater than 2A is connected to VCC and GND of TBPWR, the fuse in front of the terminal power output shorts to ensure the safety of the internal system of the controller connected to the same SMPS.
• If a current greater than 2A is required for the configurable digital I/O, be sure to connect additional external power source (24V) to VIO and GIO.