Both digital input-output modules (digital I/O modules) and analog I/O modules process signals and send out other signals based on what they receive according to specific currents. An analog I/O module helps control, measure and analyze information. A digital input-output module is also responsible for processing data digitally. It reads on and off signals and converts voltage before sending it on to computer systems.

When purchasing a digital I/O module, you should consider the power requirements, voltages and working environment in regards to temperature and humidity. When looking for either analog or digital input-output modules you might want to:

1. Look for sellers of I/O modules that have a large product choice.

2. Cut costs by purchasing from an input-output module wholesale distributor.

3. Purchase from I/O module providers that offer custom designs.

Action Steps
The best contacts and resources to help you get it done

Purchase from sellers of input-output modules with a large and varied inventory

Look for a manufacturer carrying numerous I/O module designs, including outdated ones, to find ones that best suit your purposes. Specifically look for companies that constantly expand inventory. Ask what new products are available in the near future.

I recommend: Measurement Computing offers customers a wide variety of products to choose from. Its website has an easy-to-use interface for product selection and information. Steven Engineering offers I/O modules from many manufacturers, so customers know they are getting quality equipment and can choose the perfect product from a wide selection.

Purchase from an I/O module providers selling wholesale products to cut down business costs

When you buy a used or refurbished I/O module, you save money and often get a chance to exchange the component if it is not completely satisfactory in performance.

I recommend: Sillworks.com offers wholesale products such as the StorageWorks DUAL I/O Module ULTRA 320. It provides technology solutions to clients throughout the United States and Canada. Surplus Traders has a large inventory of wholesale technology parts. It carries both analog and digital I/O modules.

Locate a provider that offers custom work for your input-output module

If you can't find what you need or you have developed a new product, a custom equipment company can make the parts you need. Purchase an input-output module suited for particular business specifications by dealing with a manufacturer of custom equipment.

I recommend: Access I/O Products has a wide range of I/O products including digital and analog ones. It prides itself on the quick turn-around of custom products. Animatics has a varied selection of I/O modules and works with the client to meet unique specifications on design.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  If you are unfamiliar with I/O modules, consult with an expert to determine which I/O modules would work most effectively with your existing equipment.