Im deciding if i should get the 9x tend modules, but i cant find any documentation on how to configure them.
If anyone know how to/ can find out how to do this it would be much appreciated.
There's some documentation on the digi.com website. You might need to register to get access to it (as far as I can tell, they do honor their privacy policy, and haven't set me up for spamming at the email address I used to sign up). They have EEPROM for configuration storage, so you can set them up on a PC with Digi's utilities, then plug them into some other system.
If you decide to use them, be sure to get some 2mm headers to connect to them if you're not buying Digi's rather-pricey enclosures.