# Physical Input Channel points:

Operators may configure channels to scan Physical Input points by setting the SNA or DNA appropriately. All physical IO resides on NET 0. The default SNAs will always place physical IO at the lowest channel numbers.

By default, Physical Input Channels are configured as follows:

Channel | SNA | Data Type | Raw Type
--- | --- | --- | ---
1 | 0*1*1 | Boolean | DISCRETE
2 | 0*1*2 | Boolean | DISCRETE
3 | 0*1*3 | Boolean | DISCRETE
4 | 0*1*4 | Boolean | DISCRETE

To change the channel type, go to Device Settings dialog, Physical Inputs tab. You can then change the channel type from Discrete to Analog.

Note: All configuration data for the changed channel type will be reset to default.

S-Model Notes: The S-model constraints regarding channel type groupings imply that the first physical analog IO point will appear at channel 33.