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Digital I/O
Digital I/O  
Digital I/O cards and modules let you sense and control binary (on/off, high/low) signals. Most models are commonly used to control devices and sense switch closures, while others provide high-speed pattern generation, timing and event counting. Models with current sink capacity of 8mA or more can be used to directly switch solid-state relays, while other models have built-in relays for direct connection to field voltages.  
  135 of 135 products meet your criteria. Show more options
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I/O Lines
Input Lines
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Relays
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 135 of 135 products meet your criteria. Show more options

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    Description  BusI/O LinesInputsOutputsCurrent SinkCountersShipping  Price   
PCI and ISA Watchdog Timer Board with DB-9 Connectors WDT 0300
PCI/ISA Watchdog Timer Board with DB-9 Connectors
PCI (32-bit, 5V
keyed)
633100mA - Call  $195.00 Add to Cart
USB DIO Module with SPDT (Form C) Relays, Isolated Digital Inputs, Serial Connectors UREL 04SER
USB DIO Module with 4 SPDT (Form C) Relays, 4 Isolated Digital Inputs, 2 RS-232/422/495 Serial Ports, DIN-Rail
USB
84 - - - Same Day  $245.00 Add to Cart
24-Channel USB Digital I/O Module UMDIO 24LH
USB Digital I/O Module - 24 Channels of 64mA DIO
USB
24242464mA12+ weeks  $185.00 Add to Cart
USB Digital I/O Module (UMDIO 24LH shown) UMDIO 24L
USB Digital I/O Module - 24 Channels of DIO
USB
2424242.5mA12+ weeks  $145.00 Add to Cart
24-Channel Solid-State Relay Mounting Panel with USB Connector UCSSR 24
24-Channel Solid-State Relay Mounting Panel, with USB Connector
USB 2.0
242424 - - 1-2 weeks  $435.00 Add to Cart
8-Channel Solid-State Relay Mounting Panel, with USB Connector UCSSR 08
8-Channel Solid-State Relay Mounting Panel, with USB Connector
USB 2.0
888 - - 2+ weeks  $385.00 Add to Cart
USB Digital I/O Module - 8 Channels of Isolated High-Voltage Digital Inputs, 8 SPDT (Form C) Relays, 40-Pin Connector UCPDISO 8HD
USB Digital I/O Module - 8 Channels of Isolated High-Voltage Digital Inputs, 8 SPDT (Form C) Relays, 40-Pin Connector
USB 2.0
1688 - - 2+ weeks  $325.00 Add to Cart
8-Channel USB Digital I/O Module with 40 Screw Terminals UCPDISO 8
USB Digital I/O Module - 8 Channels of Isolated High-Voltage Digital Inputs, 8 SPDT (Form C) Relays, with 40 Screw Terminals
USB 2.0
1688 - - Call  $325.00 Add to Cart
USB Electromechanical Relay Module with 24 SPDT (Form C) Relays and 72 Screw Terminals UCERB 24
USB Electromechanical Relay Module - 24 SPDT (Form C) Relays, with 72 Screw Terminals
USB 2.0
24 - 24 - - 1-2 weeks  $385.00 Add to Cart
USB Electromechanical Relay Module with 8 SPDT (Form C) Relays and 24 Screw Terminals UCERB 08
USB Electromechanical Relay Module - 8 SPDT (Form C) Relays, with 24 Screw Terminals
USB 2.0
808 - - 2+ weeks  $275.00 Add to Cart
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 Category Browse - Digital I/O Interfaces
Counter/Timer Products