National Instruments UMI-7774 User Manual And Specifications

Also see for UMI-7772: User manual USER GUIDE AND SPECIFICATIONS

National Instruments UMI-7774 User Manual And Specifications Manual pdf 18 page image

© National Instruments Corporation 17 NI UMI-7774/72 User Guide and SpecificationsAnalog OutputThe UMI-7774/72 analog output signals are used as command outputs to servo drives or asgeneral-purpose voltage outputs. To help keep digital noise separate from the analog outputs, Pin 9provides a separate analog output ground connection. Use this analog ground connection instead ofa digital ground when you connect the UMI-7774/72 to servo drives. Analog outputs are pass-throughsignals from the motion controller. A pass-through signal provides passive filtering on the signals, whichdoes not affect the voltage range or current-handling capability of the signals.Step (CW) and Dir (CCW)The UMI-7774/72 Step (CW) and Dir (CCW) signals are used as command outputs to a stepper drive.Some stepper drives require clockwise direction (CW) and counterclockwise direction (CCW)commands rather than Step and Dir commands. You can configure National Instruments motioncontrollers to provide either type of stepper commands. Both Step (CW) and Dir (CCW) signals arepass-through signals.Voltage Considerations for the UMI-7774/72To cause current to flow through the input, the voltage applied to the following types of inputs must begreater than 3.5 V and less than 30 V.• Fault inputs• Limit and home inputs• Global Stop inputs• Trigger inputs• General-purpose digital inputsAlso, the source must be able to provide at least 7.2 mA to turn on the optical isolator and result in anON condition. When the applied voltage is below 2 V, the input results in an OFF condition.5 NC No6 Enable Yes7 Fault + Yes8 Viso (Output) Yes9 Analog Output Ground No10 Digital Ground No11 Digital Ground No12 Dir (CCW) No13 NC No14 Fault – Yes15 Ciso Yes† Provides 1 A maximum output current, shared between Control connector pin 3, Feedback connectorpins 4 and 8, and Trigger/Breakpoint connector pin 3.Table 2. Per Axis Control Connector Pin Assignment (Continued)Pin Signal Optically IsolatedArtisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com