Description
The National Instruments PXI-8423/4 RS-485 Interface Module, with part number 777737-04, features a 4-port configuration designed for RS-485 communications. To ensure signal integrity and prevent reflections, terminating resistors are used at each end of a multipoint configuration, typically ranging from 100 to 120 Ω. Additionally, the module employs two 620 Ω polarization resistors to maintain a voltage below 200 mV between the differential pair, thereby preventing the receivers from interpreting noise as data.
With an impressive electrical isolation of 2000 V, the module safeguards against voltage spikes and provides a reliable interface for industrial environments. The PXI-8423/4 is fully compatible with standard PC serial ports and supports various Windows operating systems, including Windows 2000/NT/9x, with full Plug and Play compatibility ensuring a smooth integration. It also facilitates interrupt sharing between its ports, enhancing its utility in complex systems.
Despite its obsolete status announced by National Instruments, the PXI-8423/4 remains available for purchase and repairs through Apex Waves, ensuring continued support for existing systems that utilize this module.
| Attribute | Details |
|---|---|
| Product Name | National Instruments PXI-8423/4 RS-485 Interface Module |
| Part Number | 777737-04 |
| Number of Ports | 4-port |
| Interface Type | RS-485 |
| Termination | Ending resistors at each end of the multipoint configuration (Typically 100 to 120 Ω) |
| Polarization Resistors | Two 620 Ω resistors |
| Voltage Divider | Forces voltage between differential pair to under 200 mV |
| Electrical Isolation | 2000 V isolation |
| System Compatibility | Compatible with a standard PC serial port, Windows 2000/NT/9x, full Windows 2000/9x Plug and Play compatibility |
| Interrupt Sharing | Supports interrupt sharing between ports |
| Obsolete Status | Announced by National Instruments; available from Apex Waves |
Q1: What are the features and specifications of the National Instruments PXI-8423/4 RS-485 Interface Module, and how does Apex Waves provide support for this obsolete module?
A1: The obsolete National Instruments PXI-8423/4 RS-485 Interface Module, part number 777737-04, functions as a 4-port RS-485 communications interface with features like terminating resistors and polarization resistors to ensure signal integrity, offers 2000 V of electrical isolation for protection in industrial environments, and is compatible with standard PC serial ports and various Windows operating systems, supporting Windows 2000/NT/9x with Plug and Play compatibility and interrupt sharing between ports.
Q2: What features and specifications does the National Instruments PXI-8423/4 RS-485 Interface Module provide for industrial communication systems, and how does Apex Waves ensure its availability despite its obsolete status?
A2: The key features of the National Instruments PXI-8423/4 RS-485 Interface Module that make it suitable for industrial environments include its 4-port RS-485 communication capability, the use of terminating and polarization resistors to ensure signal integrity, and its impressive 2000 V electrical isolation to protect against voltage spikes. Despite its obsolete status, Apex Waves contributes to its continued usability by offering the module for purchase and providing repair services to support existing systems that rely on this interface module.
Q3: What are the functions and compatibility features of the obsolete National Instruments PXI-8423/4 RS-485 Interface Module with part number 777737-04?
A3: The National Instruments PXI-8423/4 RS-485 Interface Module offers a 4-port RS-485 communication interface with terminating resistors for signal integrity, polarization resistors for noise prevention, 2000 V electrical isolation for protection against voltage spikes, and compatibility with various Windows operating systems for easy integration into PC-based systems; despite its obsolescence, Apex Waves ensures its availability for purchase and repair to support existing users of the module.
Q4: What are the features and capabilities of the National Instruments PXI-8423/4 RS-485 Interface Module, and how does Apex Waves provide support despite the module’s obsolete status?
A4: The National Instruments PXI-8423/4 RS-485 Interface Module features a 4-port RS-485 communication interface with 100 to 120 Ω terminating resistors and 620 Ω polarization resistors to ensure signal integrity, 2000 V electrical isolation for industrial environment safety, compatibility with standard PC serial ports, support for various Windows operating systems, and interrupt sharing capabilities; despite its obsolescence, Apex Waves continues to offer support for this module through sales and repairs, ensuring
Q5: What are the key features of the National Instruments PXI-8423/4 RS-485 Interface Module that make it suitable for industrial environments, and how does Apex Waves contribute to its continued usability despite its obsolete status?
A5: The National Instruments PXI-8423/4 RS-485 Interface Module, part number 777737-04, offers a 4-port RS-485 communication interface, with terminating resistors typically ranging from 100 to 120 ohms for signal integrity, and two 620 ohm polarization resistors to maintain differential voltage below 200 mV. It boasts an electrical isolation of 2000 V for protection in industrial settings, is compatible with standard PC serial ports, supports various Windows operating
