The National Instruments PXI-2520 (Part Number: 778572-20) is a fully programmable, general-purpose switching module with SPST independent A-frame type relays, designed for ATE and controlling heaters, lights, and fans


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Description

The General-Purpose Switching Module with Part Number 778572-20 is designed with single-pole, single-throw (SPST) independent A-frame type relays that exhibit low thermal mismatch resistance. This module is fully programmable in software and uniquely supports internal relay account tracking, making it highly adaptable for various applications.

It is suitable for automated test equipment (ATE), as well as for controlling heaters, lights, and fans. When it comes to switching inductive loads, the module is capable but may require additional protection to safeguard against high voltage transients.

Throughout its service life, the DC path resistance remains low, ensuring reliable performance, but it should be noted that this resistance increases rapidly at the end of the relay’s life. Accordingly, load ratings apply to relays used within the specified parameters before they reach the end of their life cycle.

A critical aspect of maintenance is the cycle power process, which demands the complete removal of power and allowing sufficient discharge, necessitating a total shutdown of the associated PC and chassis. Furthermore, the module’s memory retention is dependent on power; thus, stored information is lost when power is removed.

For detailed information and guidance, the module’s manual is readily available at ApexWaves.com.

Feature Specification
Part Number 778572-20
Type General-Purpose Switching Module
Relay Type Single-pole, single-throw (SPST) independent A-frame type relays
Resistance Low thermal mismatch
Programming Fully programmable in software
Relay Account Tracking Supports internal relay account tracking
Application Suitable for automated test equipment (ATE), control of heaters, lights, and fans
Switching Inductive Loads Capable, may require additional protection against high voltage transients
DC Path Resistance Remains low for the life of the relay, increases rapidly at the end of relay life
Load Ratings Apply to relays used within specification before the end of relay life
Cycle Power Process Requires complete removal of power and discharge, including total shutdown of PC and chassis
Memory Retention Requires power to maintain stored information, contents lost when power is removed
Manual Availability ApexWaves.com

Q1: What precautions should be taken when switching inductive loads with the General-Purpose Switching Module Part Number 778572-20 to protect against high voltage transients?
A1: The General-Purpose Switching Module with Part Number 778572-20 uses single-pole, single-throw (SPST) independent A-frame type relays, and its DC path resistance remains low during service life but increases rapidly at the end of the relay’s life cycle.

Q2: What additional protection may be required when using the General-Purpose Switching Module with Part Number 778572-20 to switch inductive loads in order to safeguard against high voltage transients?
A2: When switching inductive loads with the General-Purpose Switching Module Part Number 778572-20, additional protection should be implemented to safeguard against high voltage transients.

Q3: What additional protection may be required when the General-Purpose Switching Module with Part Number 778572-20 is used for switching inductive loads to prevent damage from high voltage transients?
A3: When using the General-Purpose Switching Module with Part Number 778572-20 to switch inductive loads, additional protection such as snubber circuits, varistors, or flyback diodes may be required to safeguard against high voltage transients.

Q4: What type of relay is used in the General-Purpose Switching Module with Part Number 778572-20, and how does its resistance change toward the end of its life cycle?
A4: When using the General-Purpose Switching Module with Part Number 778572-20 for switching inductive loads, additional protection such as snubber circuits, varistors, or flyback diodes may be required to safeguard against high voltage transients and prevent damage.

Q5: Given the specialized functions of the General-Purpose Switching Module with Part Number 778572-20, particularly its software programmability and internal relay account tracking, what additional protections may be necessary when switching inductive loads to prevent damage from high voltage transients?
A5: When using the General-Purpose Switching Module with Part Number 778572-20 for switching inductive loads, it may be necessary to implement additional protective measures such as snubber circuits, varistors, or transient voltage suppression diodes to safeguard the module against high voltage transients and ensure its continued reliable operation.