The Siemens 6SN1118-0DH23-0AA1 Simodrive Control Card is a digital control card for the Simodrive 611 series. This unit is used for 2 axis control. It is a closed-loop control plug in-unit. It can be used with digital drives, both feed and spindle. For more info you can check out all of our Siemens products on our website.