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External Power Terminal Name
GND
+VA
+VB
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
NI 6581/6581B Supply Control Signal Name
BANK0_SUPPLY_SELECT
BANK1_SUPPLY_SELECT
PWR_SUPPLY_SEL_0
PWR_SUPPLY_SEL_1
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.
Table 3. NI 6581 Power Connector Terminals
Ground reference for external power
External power terminal for DDCA connector.
External power terminal for DDCB connector.
NI 6581/6581B Getting Started Guide | © National Instruments | 7
Terminal Description
Signals
NI FlexRIO FPGA Module GPIO Out
GPIO_32
GPIO_32_n
GPIO_65
GPIO_65_n
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