# Configuration of the Accessory Bus

Tool accessories are connected to the tool through the accessory bus. The tool accessories are configured separately for each tool configuration on the controller.

Accessory bus configurations
Type | Description
--- | ---
ST selector | A small display and buttons used to select tasks or programs according to the configuration.
TLS tag | Tool Location System tag used to provide output signaling to the operator.
EHMI | A small display and buttons used to select tasks or programs according to the configuration.
Scanner | A device to read a barcode string or a QR code containing information.

In this Section

- ST Selector
- TLS Tag
- EHMI
- Scanner