NI 6528 User Manual

USER GUIDE AND SPECIFICATIONS
NI 6528/6529
The NI PCI/PXI-6528 device provides 24 isolated input channels and
24 isolated output channels, and the NI PXI-6529 provides 48 isolated
input channels. The NI 6528/6529 features digital filtering, change
detection, and Real-Time System Integration (RTSI) capabilities. The
NI 6528 also features programmable power-up output states and a
watchdog timer. The NI 6528/6529 is ideal for high-voltage isolation
and switching in both industrial and laboratory environments.
Contents
Configuration .......................................................................................... 2
Programming Devices in Software .................................................. 3
Functional Overview............................................................................... 4
Safety Information .................................................................................. 5
Related Documentation........................................................................... 7
Features ................................................................................................... 8
Digital Filtering................................................................................ 8
Digital Filtering Example ......................................................... 9
RTSI................................................................................................. 9
Change Detection............................................................................. 10
Change Detection and RTSI ..................................................... 10
Change Detection Example ...................................................... 11
Programmable Power-Up Output States (NI 6528 Only)................ 11
Watchdog Timer (NI 6528 Only) .................................................... 12
Watchdog Timer and RTSI....................................................... 12
Digital I/O ............................................................................................... 13
I/O Connector .................................................................................. 13
Pin Assignments .............................................................................. 13
Signal Descriptions.......................................................................... 15
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NI 6528 Specifications

General

Brand	NI
Model	6528
Category	I/O Systems
Language	English

Summary

Configuration

Programming Devices in Software

Explains how to program devices using NI-DAQ driver software and APIs.

Functional Overview

Describes the key functional components and block diagrams of the NI 6528/6529.

Safety Information

Provides critical safety guidelines for installing and using National Instruments DIO devices.

Related Documentation

Lists helpful documents for understanding the NI-DAQmx software and related tools.

Features

Digital Filtering

Details the digital filter option to eliminate glitches on input data and program filter intervals.

Digital Filtering Example

Illustrates a filter configuration with a tinterval filter interval and filter clock.

RTSI

Explains the Real-Time System Integration bus for routing timing and trigger signals.

Change Detection

Describes how to program the device to send interrupts on input line changes.

Change Detection and RTSI

Covers programming the device to send pulses on RTSI lines upon change detection events.

Change Detection Example

Presents an example of change detection for six bits of one port.

Programmable Power-Up Output States (NI 6528 Only)

Explains user-configurable power-up states for digital output lines on the NI 6528.

Watchdog Timer (NI 6528 Only)

Details the software configurable watchdog timer for setting critical outputs to safe states.

Watchdog Timer and RTSI

Discusses chaining devices and configuring timers to expire simultaneously using RTSI.

Digital I/O

I/O Connector

Describes the 100-pin SCSI connector for digital inputs and outputs.

Pin Assignments

Details the pin assignments for the 100-pin connector of the NI 6528/6529 device.

Signal Descriptions

Lists and describes the signals available on the I/O connector for NI 6528/6529 devices.

Optically Isolated Inputs

Explains the optically isolated input signal pins and their circuitry.

Sensing DC Voltages

Describes how the device detects a wide range of DC signals from TTL-like to power supply levels.

Signal Connection Example

Shows signal connections for a supply and load connected to an isolated input.

Solid-State Relay Outputs (NI 6528 Only)

Details the solid-state relay output channels on the NI 6528, used for sinking or sourcing current.

Using the NI 6528 as a TTL-Level Device

Explains how to use the +5 V line from the NI 6528 as a TTL-level output device.

Maximum Power Ratings

Power-On and Power-Off Conditions

Describes the default power-on state of digital output lines and their behavior.

Power Connections

Details the non-isolated power pins (+5 V and GND) on the I/O connector and their connections.

Isolation Circuitry

Isolation Voltages

Specifies the isolation voltage limits for terminals and connections on the device.

Protecting Inductive Loads (NI 6528 Only)

Explains how to protect outputs from flyback voltages generated by inductive loads.

Accessories

Specifications

Power Requirement

Lists the power requirements for the NI 6528/6529 device, including voltage and current.

Digital I/O

Specifies the number of channels and connector type for digital I/O on the device.

Isolated Inputs

Details the number of isolated input channels and their voltage range.

Digital logic levels

Defines the minimum and maximum voltage levels for digital logic inputs.

Solid-State Relay Outputs (NI 6528 Only)

Lists specifications for solid-state relay outputs, including type, voltage, and capacity.

Physical Characteristics

Operating Environment

Specifies the ambient temperature and humidity ranges for operating the device.

Storage Environment

Specifies the ambient temperature and humidity ranges for storing the device.

Safety

Shock and Vibration (PXI-6528/6529 Only)

Details the shock and vibration specifications for the PXI-6528/6529 devices.

Electromagnetic Compatibility

Lists the EMC standards the product meets for emissions and immunity.

CE Compliance

Online Product Certification

Guides users on obtaining product certifications and Declarations of Conformity.

Environmental Management

Waste Electrical and Electronic Equipment (WEEE)

Provides information on WEEE recycling for EU customers.