Description
The National Instruments SMB-2148 Digital I/O Accessory, with part number 781519-01, is designed to complement the NI-5751 Digitizer Module for NI FlexRIO systems, offering 8 digital inputs and 8 digital outputs for versatile digital interfacing.
Equipped with 1 VHDCI and 16 SMB jack connectors located on the front panel, this accessory facilitates easy and efficient connections. It operates independently of external power, eliminating the need for additional power sources.
With its robust shielding, the SMB-2148 ensures signal integrity and allows for an optional earth ground connection to further enhance its noise immunity. The accessory features a propagation delay of approximately 1.2 nanoseconds and maintains a channel-to-channel skew within ±35 picoseconds, ensuring precise timing for high-speed digital communications.
The characteristic impedance of the system is set at 50 Ω, which matches standard digital transmission line specifications, optimizing signal transmission and minimizing reflections.
| Specification | Detail |
|---|---|
| Part Number | 781519-01 |
| Product Name | National Instruments SMB-2148 Digital I/O Accessory |
| Compatible Module | NI-5751 Digitizer Module for NI FlexRIO |
| Digital Inputs | 8 |
| Digital Outputs | 8 |
| Connector Type (Front Panel) | VHDCI, SMB Jack Connectors |
| Number of Connectors | 1 VHDCI, 16 SMB Jacks |
| Power Requirements | No external power required |
| Shielding | Shielded, with optional earth ground connection |
| Propagation Delay | Approx. 1.2 ns |
| Channel-to-Channel Skew | ±35 ps |
| Characteristic Impedance | 50 Ω |
Question 1: What are the capabilities of the National Instruments SMB-2148 Digital I/O Accessory in terms of digital interfacing and how does it ensure signal integrity and precise timing?
Answer 1: The main purpose of the SMB-2148 Digital I/O Accessory’s integrated robust shielding is to ensure signal integrity by protecting signals from external noise, and it contributes to the accessory’s performance in digital interfacing by allowing for an optional earth ground connection, which enhances noise immunity and ensures precise timing for high-speed digital communications.
Question 2: What is the purpose of the optional earth ground connection on the National Instruments SMB-2148 Digital I/O Accessory, which offers 8 digital inputs and 8 digital outputs and is designed to complement the NI-5751 Digitizer Module?
Answer 2: The National Instruments SMB-2148 Digital I/O Accessory, designed to work with the NI-5751 Digitizer Module for NI FlexRIO systems, provides 8 digital inputs and 8 digital outputs for flexible digital interfacing, and features a VHDCI and 16 SMB jack connectors for efficient connections without the need for an external power source. It ensures signal integrity through robust shielding and an optional earth ground connection, boasts a low propagation delay of approximately 1.2 nanoseconds with
Question 3: What are the key functions and specifications of the National Instruments SMB-2148 Digital I/O Accessory, and how do they support its use with the NI-5751 Digitizer Module for NI FlexRIO systems?
Answer 3: The National Instruments SMB-2148 Digital I/O Accessory offers 8 digital inputs and 8 digital outputs for digital interfacing, features 1 VHDCI and 16 SMB jack connectors for efficient connectivity, operates without external power, maintains signal integrity with robust shielding and an optional earth ground connection, and has a characteristic impedance of 50 Ohms for optimal signal transmission and minimal reflections.
Question 4: What are the capabilities and specifications of the National Instruments SMB-2148 Digital I/O Accessory in terms of digital interfacing, connectivity, power requirements, signal integrity, and impedance matching?
Answer 4: The National Instruments SMB-2148 Digital I/O Accessory offers 8 digital inputs and 8 digital outputs for digital interfacing, ensures signal integrity through robust shielding and an optional earth ground connection, and guarantees precise timing with a propagation delay of approximately 1.2 nanoseconds and channel-to-channel skew within ±35 picoseconds.
Question 5: What is the main purpose of the SMB-2148 Digital I/O Accessory’s integrated robust shielding, and how does it contribute to the accessory’s performance in digital interfacing?
Answer 5: The optional earth ground connection on the National Instruments SMB-2148 Digital I/O Accessory is designed to enhance noise immunity by providing a reference point for the system’s shielding, thereby improving signal integrity for the digital interfacing provided by its 8 digital inputs and 8 digital outputs.
