Table 3.
NI 6581 Power Connector Terminals
External Power Terminal Name
Terminal Description
GND
Ground reference for external power
+VA
External power terminal for DDCA connector.
+VB
External power terminal for DDCB connector.
The following table lists the NI 6581/6581B power supply control signals and the
corresponding NI FlexRIO FPGA module signals.
Table 4.
NI 6581/6581B Power Supply Control Signals and NI FlexRIO FPGA Module
Signals
NI 6581/6581B Supply Control Signal Name
NI FlexRIO FPGA Module GPIO Out
BANK0_SUPPLY_SELECT
GPIO_32
BANK1_SUPPLY_SELECT
GPIO_32_n
PWR_SUPPLY_SEL_0
GPIO_65
PWR_SUPPLY_SEL_1
GPIO_65_n
Connectivity Options
NI recommends that you use the following cables with the NI 6581/6581B:
•
NI SHC68-C68-D4 cable (part number 196275-01)—Shielded cable designed for single-
ended, high-speed digital signal transmission. This cable has individual microcoaxial
50 Ω lines for each signal.
•
NI C68-C68-D4 cable (part number 195949-01)—Unshielded, single-ended 50 Ω cable.
•
NI SHC68-H1X38 cable (part number 192681-1R5)—Single-ended, 50 Ω cable that
breaks out each single-ended signal into two 0.1 inch header receptacles, one receptacle
each for the signal and ground. It provides an easy way to connect the NI 6581/6581B to
various types of devices and circuits for interfacing, testing, or analysis.
This cable offers connectivity similar to that found on a typical logic analyzer, so you can use
it in logic analyzer-type applications. Unlike a typical logic analyzer, however, this cable also
allows for simultaneous pattern generation and acquisition so that you can use it in stimulus/
response applications as well. The following figure shows the parts locator diagram for the
single-ended digital flying lead cable.
NI 6581/6581B Getting Started Guide
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© National Instruments
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