Ni usb-6001/6002/6003 User Guide National Instruments
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code vf-s11, BÁO CÁO MÔN ĐƯỜNG LỐI, bao cao mon hoc trang bị
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Example of Connecting a Load Caution Exceeding the maximum input voltage ratings or maximum output ratings, which are listed in the specifications document for the device, can damage the device and the computer. National Instruments is not liable for any damage resulting from such signal connections. For more information, refer to the device specifications available at ni.com/manuals . Power-On States At system startup and reset, the hardware sets all DIO lines to high-impedance inputs. The NI DAQ device does not drive the signal high or low. Each line has a weak pull-down resistor connected to it. 1 P0.0 configured as an open collector digital output driving a LED 2 P0.2 configured as an active drive digital output driving an LED 3 P0.4 configured as a digital input receiving a TTL signal from a gated inverter 4 P0.7 configured as an digital input receiving a 0 V or 5 V signal from a switch +5 V LED
Switch I/O Connector GND P0.0
P0.1 P0.2
P0.3 P0.4
P0.5 P0.6
P0.7 +5 V
LED 1 2 3 4 TTL Signal DAQ Device 22 | ni.com | NI USB-6001/6002/6003 User Guide Source/Sink Information When used in output mode, the default configuration of the digital ports is active drive, allowing 3.3 V operation with a source/sink current limit of ±4 mA. The ports can be configured as open collector using the NI-DAQmx API, allowing operation with a different voltage level when used in conjunction with an external user-provided pull-up resistor. Figure 14 shows an example of this connection. tải về 1.5 Mb. Chia sẻ với bạn bè của bạn:
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