National Instruments 6527 Solid-State Relay Outputs

Chapter3 MakingSignal Connections

6527User Manual 3-10 ni.com

Solid-State Relay Outputs

Ona 6527 devi ce,I/O connectorpins 5 1 through 98, shown in Figure 3-1,

represent the terminals of the solid-state relays.

Output Channels

The output channels of a 6527 device are solid-state relays containing an

LEDand two MOSFETs connected together to form a bidirectional switch.

TheLH1546 is a solid-state relay. Depending o n how the load is connected

to theterminals, an output can either source or sink currents.

Figure 3-5 showstwo signal connection examples for driving a load with

these solid-state relays.

Figure3-5. Signal Connections for Solid-State Relays

Load

+5V

Supply

–

Isolation Isolated

Ground

Digital

Logic

390 DIG+

6527

DIG–

Load

+5V

Supply

–

Isolation Isolated

Ground

Digital

Logic

390 DIG+

6527

DIG–

a.Sinking Current

b.Sourcing Current

LH1546

Contents

Main Page Important Information Warranty Copyright Trademarks WARNINGREGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS Contents Page About This Manual How To Use the Manual Set Conventions Related Documentation Getting Started with Your 6527 About the 6527 Device Using PXI with CompactPCI What You Need to Get Started Software Programming Choices National Instruments Application Software NI-DAQ Driver Software Optional Equipment Custom Cabling Safety Information Unpacking Installing and Configuring the 6527 Installing Software Installing the 6527 Page Configuring the 6527 Making Signal Connections I/O Connector Chapter3 MakingSignal Connections 6527User Manual 3-2 ni.com Note Forinput ports, connect the higher voltage to the DIG+ pin and the lower voltage to Input Outputwith Readback Figure3-1. 6527Connector Pin Assignments Cable Assembly Connectors Figure 3-2. Cable-AssemblyConnector Pinout for the R1005050 Ribbon Cable I/O Connector Signal Descriptions Power Connections Isolation Voltages Optically Isolated Inputs Input Channels Sensing DC Voltages Signal Connection Example Reducing the Forward Current for High Voltages Solid-State Relay Outputs Figure3-5. Signal Connections for Solid-State Relays Output Channels Page Overcurrent Protection Power-on and Power-offConditions Using the 6527 Functional Overview Figure4-1. 6527Block Diagram PCI Interface Circuitry Digital I/O Circuitry Optical Isolation Circuitry Digital Filtering Page Change Notification Page A Specifications Digital I/O Isolated Inputs Relay Outputs Power Requirement Physical Environment Safety B Technical Support Resources Web Support NI Developer Zone Customer Education System Integration Worldwide Support Glossary Numbers/Symbols A Page Page Page Index Numbers B C D E F G H I R S T U W