8.12.5.1 Step/Direction with 5 V signal level (X5)Connection of the servo amplifier to a stepper-motor controller with 5 V signal level. The connectorX5 must be used.Frequency limit: 1,5 MHzAGND and DGND (connector X3) must be joined together !8.12.5.2 Step/Direction with 24 V signal level (X3)Connection of a servo amplifier to a stepper-motor controller with 24 V signal level. The digitalinputs DIGITAL-IN 1 and 2 at connector X3 must be used.Frequency limit: 250 kHzAGND and DGND (connector X3) must be joined together !62 SERVOSTAR ® 601...620 Product ManualElectrical Installation 07/2007 Danaher MotionSERVOSTAR 600SERVOSTAR 600