National Instruments DAQ 6527 - Manual (Page 21)

Chapter 3 Signal Connections
© National Instruments Corporation 3-5 6527 User Manual
I/O Connector Signal Descriptions
Table 3-2 lists the signal descriptions for the 6527 device I/O
connector pins.
Table 3-2. Signal Descriptions for 6527 Device I/O Connectors
Pin Signal Name Description
33, 35, 37, 39,
41, 43, 45, 47 DIG+0.<7..0> Isolated input port 0, positive terminals—Take measurements at
these terminals. These terminals should be positive relative to
their corresponding DIG– lines. A logic high (data bit of 1)
indicates input voltage and current are present.
34, 36, 38, 40,
42, 44, 46, 48 DIG–0.<7..0> Isolated input port 0, negative terminals—Each of these
terminals serves as the reference terminal from which the
corresponding DIG+ line is measured. A logic high (data bit of
1) indicates input voltage and current are present.
17, 19, 21, 23,
25, 27, 29, 31 DIG+1.<7..0> Isolated input port 1, positive terminals—Take measurements at
these terminals. These terminals should be positive relative to
their corresponding DIG– lines. A logic high (data bit of 1)
indicates input voltage and current are present.
18, 20, 22, 24,
26, 28, 30, 32 DIG–1.<7..0> Isolated input port 1, negative terminals—Each of these
terminals serves as the reference terminal from which the
corresponding DIG+ line is measured. A logic high (data bit of
1) indicates input voltage and current are present.
1, 3, 5, 7, 9,
11, 13, 15 DIG+2.<7..0> Isolated input port 2, positive terminals—Take measurements at
these terminals. These terminals should be positive relative to
their corresponding DIG– lines. A logic high (data bit of 1)
indicates input voltage and current are present.
2, 4, 6, 8, 10,
12, 14, 16 DIG–2.<7..0> Isolated input port 2, negative terminals—Each of these
terminals serves as the reference terminal from which the
corresponding DIG+ line is measured. A logic high (data bit of
1) indicates input voltage and current are present.
49, 99 +5 V +5 Volts—These pins are fused for up to 1 A total of +4.5 to
+5.25 V from the computer power supply. These pins are not
isolated.
50, 100 GND Ground—These pins are connected to the computer ground
reference. These pins are not isolated.