User`s manual

W406 Hardware User’s Manual Hardware Connection Description
NOTE: To remove the SD card from the slot, press the SD card in slightly with your finger, and
then remove your finger to allow the card to spring out partially. You may now grasp the top of the
card with two fingers and pull it out.
USB
The W406 includes one USB 2.0 host. The hosts can be used for an external flash disk or hard
drive for storing large amounts of data.
DI/DO
The W406 embedded computer offers 4 digital input channels and 4 digital output channels. See
the following figures for pinouts and wiring.
Digital Input Wiring
Dry Contact Wet Contact
Note: If you are using wet contacts, you must connect “COM” to power.
3-9