National Instruments NI 6602 User Manual

Also see for NI 6601: User manual Manual User manual User manual User manual

National Instruments NI 6602 User Manual Manual pdf 40 page image

Chapter 3 Signal Connections© National Instruments Corporation 3-17 NI 660x User ManualPXI TIO devices use PXI trigger line 7 as their RTSI clock line. Themaximum timebase provided by the PXI TIO device is phase locked to the10 MHz PXI backplane clock. By using other PXI modules that phase locktheir board clocks to the 10 MHz PXI backplane clock, you can bettersynchronize operation in a multi-module PXI system. The phase locking isenabled by default and can be disabled by way of software. If the moduleis used in a compact PCI chassis that does not have the 10 MHz PXIbackplane clock, the phase locking is automatically disabled. Additionally,PXI trigger line 6 corresponds to PXI star trigger on PXI TIO devices.Figure 3-9 shows the RTSI signal connection scheme for PXI TIO devices.Figure 3-9. RTSI Signal Connection for PXI+5 V Power SourceThe +5 V pin on the I/O connector supplies power from the computerpower supply through a self-resetting fuse. The fuse resets automaticallywithin a few seconds after removal of an overcurrent condition. The powerpin is referenced to the D GND pins and can supply power to externaldigital circuitry. The power rating for this +5 V pin on the NI 660x is+4.65 to +5.25 VDC at 1 A.PXI Star 6 CtrnSourceCtrnGateCtrnAuxCtrnInternalOutput20 MHz TimebaseMaster TimebasePXI Trigger 7RTSI Bus ConnectorRTSI SwitchRTSI SwitchPXI Trigger<0..5>