Description
The NI PXI-8420/16 RS-232 Interface, with part number 777733-16, is a robust communication module featuring a RS-232 interface and an impressive 16 ports for connectivity.
This interface is designed to provide 2000 V of optical isolation, enhancing the safety and integrity of data transmissions. It supports a significant number of devices on the RS-485 bus, allowing up to 32 devices to communicate effectively.
Data transfer is streamlined and efficient, utilizing Direct Memory Access (DMA) for optimal speed and reliability. The module is capable of supporting a maximum data rate of up to 10 Mbps, which is ideal for high-speed data acquisition and control applications.
The device’s ability to maintain signal integrity over long distances is evident, with a maximum distance of up to 1.3 km being supported. This is achieved through the use of differential transmission on twisted pair cables, which is a standard for reducing electromagnetic interference.
Furthermore, the NI PXI-8420/16 utilizes four signals for communication—two for transmission and two for reception, in addition to a ground connection that is typically linked to the cable’s shield.
To combat the challenges of line noise, the interface employs a signal subtraction method for noise reduction, which greatly diminishes any noise induced on the transmission lines, delivering clear and reliable communication.
| Technical Specifications of NI PXI-8420/16 RS-232 Interface | |
|---|---|
| Part Number | 777733-16 |
| Interface Type | RS-232 |
| Number of Ports | 16 |
| Optical Isolation | 2000 V |
| Supported Devices on RS-485 | Up to 32 devices |
| Data Transfer Method | DMA |
| Maximum Data Rate | Up to 10 Mbps |
| Maximum Distance | Up to 1.3 km |
| Transmission Type | Differential transmission on twisted pair cables |
| Signals Used for Transmission | Two for transmitting and two for receiving, plus ground |
| Noise Reduction | Signal subtraction method for noise reduction |
Question 1: What is the maximum data rate supported by the NI PXI-8420/16 RS-232 Interface, and how does it ensure the integrity of data over long distances?
Answer 1: The NI PXI-8420/16 RS-232 Interface achieves a maximum data distance of 1.3 km with minimal electromagnetic interference through the use of differential transmission on twisted pair cables, which helps to reduce noise and maintain signal integrity over long distances.
Question 2: What is the maximum data rate supported by the NI PXI-8420/16 RS-232 Interface and how does it ensure signal integrity over 1.3 km distances?
Answer 2: The NI PXI-8420/16 RS-232 Interface supports a maximum data rate of up to 10 Mbps, and it ensures the integrity of data over long distances through differential transmission on twisted pair cables, which reduces electromagnetic interference, and by utilizing signal subtraction for noise reduction.
Question 3: What is the maximum data rate and distance supported by the NI PXI-8420/16 RS-232 Interface with part number 777733-16, and how does it ensure signal integrity over long distances?
Answer 3: The maximum data rate supported by the NI PXI-8420/16 RS-232 Interface with part number 777733-16 is up to 10 Mbps, and it supports a maximum distance of up to 1.3 km, ensuring signal integrity over long distances through differential transmission on twisted pair cables, which helps to reduce electromagnetic interference.
Question 4: How does the NI PXI-8420/16 RS-232 Interface ensure safe and reliable data transmission with a maximum distance of up to 1.3 km?
Answer 4: The NI PXI-8420/16 RS-232 Interface ensures safe and reliable data transmission over distances of up to 1.3 km by providing 2000 V of optical isolation to enhance data integrity, utilizing differential transmission on twisted pair cables to reduce electromagnetic interference, and employing a signal subtraction method to mitigate line noise.
Question 5: How does the NI PXI-8420/16 RS-232 Interface achieve a maximum data distance of 1.3 km while ensuring minimal electromagnetic interference?
Answer 5: The NI PXI-8420/16 RS-232 Interface supports a maximum data rate of up to 10 Mbps and ensures signal integrity over distances up to 1.3 km by using differential transmission on twisted pair cables, which helps to reduce electromagnetic interference.
