USB-6525 NI [National Instruments Corporation], USB-6525 Datasheet

USB-6525

Manufacturer Part Number

USB-6525

Description

Small, portable digital I/O device / Eight channel-to-channel optically isolated inputs

Manufacturer

NI [National Instruments Corporation]

Datasheet

1.USB-6525.pdf (5 pages)

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Industrial Digital I/O Device for USB –

60 V, Channel-to-Channel Isolated

NI USB-6525

• Small, portable digital I/O device

• Eight channel-to-channel optically

• 500 mA maximum switching current

• One 32-bit event counter

• Full-speed USB (12 Mb/s) bus interface

• Built-in, removable connectors for

• USB cable strain relief

Table 1. NI USB-6525 Specifications Overview

Overview and Applications

The National Instruments USB-6525 is a full-speed USB device with

eight normally open, channel-to-channel isolated, solid-state relay

outputs and eight ±60 VDC channel-to-channel isolated digital inputs.

The NI USB-6525 offers features for industrial control and manufacturing

test applications, such as factory automation, embedded machine

control, and production line verification. The solid-state relay outputs

have a 60 VDC/30 V

switching current, making them ideal for controlling pumps, valves,

motors, and other industrial actuators. The eight isolated digital input

channels break ground loops and offer protection from noise and spikes

on external signals. You can also use one of the digital input channels as

a 5 kHz, 32-bit event counter for counting digital pulses.

Hardware

The USB-6525 has eight channel-to-channel optically isolated inputs,

P1.<0..7>, and eight channel-to-channel optically isolated, solid-state

relay outputs, P0.<0..7>. The isolated inputs consist of an optocoupler, a

depletion-mode MOSFET-based current-limiting circuit, and a Schottky

diode. Each channel has its own positive and negative terminals capable

of detecting a wide range of DC signals, from 5 V TTL logic levels to DC

power supply levels up to 60 V.

NI USB-6525

isolated inputs (±60 VDC)

isolated, solid-state relay outputs

(60 VDC/30 V

per channel

easy connectivity

Product

Digital Inputs

rms

max)

rms

switching voltage and 500 mA/ch maximum

Low Threshold

1 VDC

High Threshold

Operating Systems

• Windows Vista/XP/2000

Recommended Software

• LabVIEW

• LabWindows

• Measurement Studio

• LabVIEW SignalExpress

Other Compatible Software

• Visual Studio .NET

• C, C++

• Visual Basic

Measurement Services

Software (included)

• NI-DAQmx driver software

• Measurement & Automation Explorer

• LabVIEW SignalExpress LE

configuration utility

data-logging software

3.2 VDC

™

Input Current

/CVI

3 mA/ch

SSR Outputs

counter. In this mode, the device counts low to high transitions on P1.7.

You can arm and disarm the counter as well as read or reset the count

through software.

DC power source. The default power-on state of the solid-state relays is

open. The relays also remain open when the computer and the USB-6525

device are powered off.

Table 2. NI USB-6525 Pinout

PFI 0 (an alias to P1.7) can also function as the source for a 32-bit

You can connect loads to the solid-state relay outputs with an AC or

Module

Switching Current

Terminal

500 mA

Signal

P0.0A

P0.1A

P0.2A

P0.3A

P0.4A

P0.5A

P0.6A

P0.7A

Max Signal Range

P0.0B

P0.1B

P0.2B

P0.3B

P0.4B

P0.5B

P0.6B

P0.7B

±60 VDC

Module

Isolation

Ch-to-Ch

Terminal

32-Bit Counters

P1.7 + /PFI 0 +

P1.7 - /PFI 0 -

Signal

P1.0 +

P1.0 -

P1.1 +

P1.1 -

P1.2 +

P1.2 -

P1.3 +

P1.3 -

P1.4 +

P1.4 -

P1.5 +

P1.5 -

P1.6 +

P1.6 -

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