Digi to Digi with Serial cable

Can i connect Digi to Digi with serial cable? if yes, what is interface connection and how to configure it.

Thanks in advance.

Sure you can, but what are your trying to accomplish? That impacts the config.

thanks Coralyn, normally we used Digi connecting with PLC (local) and remote connected with another Digi on other side. Now they want to do revert with 2 Digis at same location. If yes, Please send me some photos or configuration how to set it up. thanks in advance for your help.