National Instruments BNC-2120, Руководство по установке

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14 | ni.com | BNC-2120 Installation Guide
Connecting Digital I/O Signals
Connect to the digital I/O signals of your DAQ device to the digital I/O screw terminals,
P0.<0..7>, on the BNC-2120. You can individually configure each signal as an input or output.
D GND is available at the screw terminals to supply the reference for the DIO signals. When
connecting signals to the screw terminals, use 28–16 AWG wire with the insulation stripped to
0.28 in.
Note
P0.6 and P0.7 can control the up/down signal of general-purpose counters
0 and 1, respectively. Refer to the Using the Quadrature Encoder section for more
information about using the P0.6 and P0.7 terminals with the quadrature encoder.
The LEDs next to each screw terminal indicate the state of each digital line, as listed in Table 3.
Specifications
This section lists the specifications of the BNC-2120. These specifications are typical at 25 °C
unless otherwise specified.
Note
Refer to your DAQ device documentation for specifications about analog
input, analog output, trigger/counter, and digital and timing I/O signals.
Analog Input
Number of channels (default) ...........................8 differential
Field connections (default) ...............................8 BNC connectors
Protection ..........................................................No additional protection provided.
Consult your DAQ device specifications.
Optional inputs
AI 0 ...........................................................Temperature sensor
AI 1 ...........................................................Thermocouple
AI 3, AI 11 ................................................Resistor measurement (requires RSE
configuration)
Optional connections
Thermocouple..............................................Uncompensated miniature connector, mates with
2-prong miniature or subminiature connector
Resistor .....................................................2 screw terminals
Table 3.
Digital I/O LEDs
Digital I/O LED Digital Port State
Lit The port is either pulled high or driven high
Not lit The port is either pulled low or driven low