Справочник Пользователя для National Instruments DAQ 6527
Chapter 3
Signal Connections
3-6
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Power Connections
Four of the pins on the I/O connector are not isolated. Pin 50 and pin 100
connect to GND, the computer ground reference. Pin 49 and pin 99 of the
I/O connector supply +5 V from the computer power supply via a
self-resetting fuse. The fuse resets automatically within a few seconds after
an overcurrent condition is removed. The +5 V pins are referenced to the
GND pins and can be used to power external digital circuitry that does not
require isolation.
connect to GND, the computer ground reference. Pin 49 and pin 99 of the
I/O connector supply +5 V from the computer power supply via a
self-resetting fuse. The fuse resets automatically within a few seconds after
an overcurrent condition is removed. The +5 V pins are referenced to the
GND pins and can be used to power external digital circuitry that does not
require isolation.
•
Power rating: 1 A at +4.5 to +5.25 V
Warning
The power pins, +5 V and GND, are not isolated; they connect to your computer
power supply. Never connect a +5 V power pin directly to GND. Never connect a +5 V or
GND pin to any other voltage source; doing so can lead to injury. National Instruments is
not liable for any damages or injuries resulting from such a connection.
GND pin to any other voltage source; doing so can lead to injury. National Instruments is
not liable for any damages or injuries resulting from such a connection.
Pin
Signal Name
Description
83, 85, 87, 89,
91, 93, 95, 97
91, 93, 95, 97
DIG+3.<7..0>
Isolated output port 3, first terminals—Each of these is the first
of two terminals of a bidirectional solid-state relay. A logic low
(data bit of 0) closes the relay.
of two terminals of a bidirectional solid-state relay. A logic low
(data bit of 0) closes the relay.
84, 86, 88, 90,
92, 94, 96, 98
92, 94, 96, 98
DIG–3.<7..0>
Isolated output port 3, second terminals—Each of these is the
second of two terminals of a bidirectional solid-state relay.
A logic low (data bit of 0) closes the relay.
second of two terminals of a bidirectional solid-state relay.
A logic low (data bit of 0) closes the relay.
67, 69, 71, 73,
75, 77, 79, 81
75, 77, 79, 81
DIG+4.<7..0>
Isolated output port 4, first terminals—Each of these is the first
of two terminals of a bidirectional solid-state relay. A logic low
(data bit of 0) closes the relay.
of two terminals of a bidirectional solid-state relay. A logic low
(data bit of 0) closes the relay.
68, 70, 72, 74,
76, 78, 80, 82
76, 78, 80, 82
DIG–4.<7..0>
Isolated output port 4, second terminals—Each of these is the
second of two terminals of a bidirectional solid-state relay.
A logic low (data bit of 0) closes the relay.
second of two terminals of a bidirectional solid-state relay.
A logic low (data bit of 0) closes the relay.
51, 53, 55, 57,
59, 61, 63, 65
59, 61, 63, 65
DIG+5.<7..0>
Isolated output port 5, first terminals—Each of these is the first
of two terminals of a bidirectional solid-state relay. A logic low
(data bit of 0) closes the relay.
of two terminals of a bidirectional solid-state relay. A logic low
(data bit of 0) closes the relay.
52, 54, 56, 58,
60, 62, 64, 66
60, 62, 64, 66
DIG–5.<7..0>
Isolated output port 5, second terminals—Each of these is the
second of two terminals of a bidirectional solid-state relay.
A logic low (data bit of 0) closes the relay.
second of two terminals of a bidirectional solid-state relay.
A logic low (data bit of 0) closes the relay.
Table 3-2. Signal Descriptions for 6527 Device I/O Connectors (Continued)