National Instruments UMI-7764 User Manual

National Instruments UMI-7764 User Manual Manual pdf 17 page image

© National Instruments Corporation 17 UMI Accessory User Guide — UMI-4AFigure 19. UMI-4A Limit Switch Terminal Block Pin Assignment(Passive Limit Switch Connection Example)Digital I/O Terminal BlocksThe UMI-4A has two I/O connectors: a 34-pin male box header (J19),which is compatible with standard Opto 22 I/O racks, and two 6-pinremovable screw terminal blocks (J10 and J11) for all other I/Oconfigurations. You can use both I/O configurations separately or inparallel.Pin 5 of each terminal block (J10 and J11) is an Enable Input connection.This connection controls a system enable–system inhibit function. If yourconfiguration uses the inhibit output signal available on each per-axisdriver/amplifier terminal block, the enable input on J10 or J11 must beconnected to the common (ground) signal to enable the driver/amplifier.Note You do not need to duplicate the switch on both J10 and J11; use only one or theother for the Enable Input.Figure 20. Using Available Pins On J10 and J11Caution If you connect the enable input to the common signal and bypass theenable/disable function, you need to provide enable/disable control of thedrivers/amplifiers elsewhere in the system.123456Forward LimitHome SwitchReverse LimitAux. VDC+5 V (Output)Digital Ground123456I/O 1I/O 2I/O 3I/O 4Enable InputDigital Ground123456I/O 5 1I/O 6 1I/O 7 1I/O 8 1Enable InputDigital GroundorJ10 J111Reserved when used with a stepper board. Do not connect anything to these pins.