The Digital I/O Handbook

  The Digital I/O Handbook A Practical Guide to Industrial Input & Output Applications Read Featured Chapters, free online. Digital I/O Explained Renowned technical author Jon Titus and the President and CEO of Sealevel Systems, Tom O’Hanlan, clearly explain real-world digital input/output implementation from both a hardware and software perspective. Whether you are a practicing […]

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Control a DC Fan with a Digital I/O Relay

  Hardware: A PC with Sealevel PLC-16.PCI (Part# 8011) board installed, connected to Sealevel TB08 terminal block. The cable from the PC to terminal block is supplied. Visual Basic Application to turn on fan:  

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Control Industrial Devices with USB Digital I/O

  Hardware: A PC or Laptop with Sealevel SeaLINK USB PIO-48 Adapter (Part# 8203) connected to an industry standard relay rack on DIN rail mounting track controlling a light pole or other industrial device. The USB cable (Part# CA179) is included with the 8203. Ribbon cables (Part# CA167) can be used to connect the 8203 […]

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Controlling a Motor Using a SeaI/O Module with DAQFactory HMI Software

  By: Will Rostron, Applications Engineer Introduction This support article compliments the application example video, below. Sealevel offers many digital and analog I/O adapters that are compatible with the industry standard Modbus protocol. Modbus is supported by many third party data acquisition and HMI software applications. One of my favorite 3rd party software choices is […]

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How to connect buttons & LEDs to Digital I/O

  Hardware: A PC with Sealevel PIO-48.PCI (Part# 8005) or USB SeaPORT PIO-48 products, connected to Sealevel TB07, terminal block with CA167 cable. The cable from the PCto terminal block is available as an option. Software Control: Run VBTEST or VCTEST to monitor switch inputs. Click on Outputs (B0) to turn LED #1 ON/OFF. Click […]

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How To Control a Pro CD Player with Digital I/O

  Hardware: A PC with Sealevel DIO-16.PCI Adapter (Part# 8002) or USB SeaLINK (Part# 8208), connected to Sealevel TB02 terminal block with CA112 cable. The TB02 and CA112 cable are available in a kit as Part# KT101. Software Control: Reed Relay output provides contact closure to ground (common) causing the CD player to enter the […]

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How to Switch Highly Inductive Loads Using Digital I/O

  Application Example: Highly inductive loads, those that use magnetic fields such as DC motors, produce a surge of voltage (referred to as “blowback voltage”) when a relay is opened, breaking power to the electrical circuit. This surge of blowback voltage is created by the collapsing of the armature coil’s magnetic field. In cases with […]

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Test Applications with the Digital I/O Simulator

  Hardware: A PC with Sealevel PIO Adapter (Part# 8005, 8008, 8009, 8010) or USB SeaLINK (Part# 8203, 8205), connected to Sealevel TA01, Relay Rack I/O Simulator terminal block with CA167 cable. The CA167 cable from the PC to terminal block is available as an option. Software Control: Run VBTest or VCTest to cause the […]

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