IO Modules

Taco SR503-4 Switching Relay with Priority, 3 Zone
$179.63
Compare at 46 stores

Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins Compatible with Both 3.3V and 5V Levels
$11.99
Compare at 10 stores

Roadmaster 690 Single Park Light Diode
$22.68
Compare at 23 stores

MCP23017-E/SP MCP23017 16-Bit I/O Expander with Serial Interface 1.7 MHz I2C Breadboard-Friendly IC DIP-28 (1 Piece)
$12.8
Compare at 7 stores
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MCP23017-E/SP MCP23017 16-Bit I/O Expander with Serial Interface 1.7 MHz I2C Breadboard-Friendly IC DIP-28 (1 Piece)
$12.8
Compare at 7 stores

Qolsys QS7133-840 IQ Hardwire 16-F Wireless Converter
$51.99
Compare at 27 stores

5V Relay Module with Optocoupler Isolation Support High and Low Level Trigger Relay Red Board (8 Channel 5V Relay)
$10.97
Compare at 13 stores

RS232 RS485 Modbus RTU to Modbus TCP Gateway Serial to Ethernet Converter USR-TCP232-410s
$45.59
Compare at 38 stores

ELECTRONICS-SALON DPDT Signal Relay Module, 5Vdc, RY5W-K Relay. Has Assembled.
$12.99
Compare at 2 stores

Electronics-Salon DIN Rail Mount 6 Amp 1000V 8 Individual Diode Module, 6A10.
$22.99
Compare at 4 stores

Zooz Z-Wave Long Range MultiRelay ZEN16 800LR for Garage Doors, Sprinklers, Gas Fireplace; 3 Dry Contact Relays (15A, 15A, 20A); 12-24 V AC/DC or USB C Power; Signal Repeater; Hub Required
$37.95
Compare at 14 stores

Dinkle DK4N DIN Rail Terminal Block Screw Type UL 600V 30A 10-22AWG, Pack of 100
$49.99
Compare at 20 stores
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Adafruit Assembled Terminal Block Breakout FeatherWing for all Feathers 2926
$18.99
Compare at 12 stores

PCF8574 I2C GPIO Expander Breakout - Stemma QT/Qwiic Ada 5545
$11.99
Compare at 4 stores

U3-HV USB DAQ Device with 4 Dedicated High-Voltage (±10V) Analog Inputs, 12 Flexible I/O for Analog and Digital Data Acquisition of Sensors, Controlling Relays, Automation and Timers
$176
Compare at 14 stores

Lab jack Low-Voltage U3-LV USB Module - High-Speed Data Acquisition DAQ Device with 4 Analog Inputs – Digital I/O and Flexible I/O Channels - Compatible with Third party Software
$176
Compare at 11 stores

Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins Compatible with Both 3.3V and 5V Levels
$11.99
Compare at 10 stores

Electronics-Salon Prototype Screw/Terminal Block Shield Board Kit for Arduino MEGA-2560 R3.
$17.9
Compare at 2 stores

Forward and Reverse Relay Module for Motor/Linear Actuator, Reversing Relay Module (DC 24V)
$17.4
Compare at 3 stores

GeeekPi GPIO Screw Terminal Block Breakout Board HAT for Raspberry Pi, GPIO Expansion Board Breakout Module with GPIO Status LED for Raspberry Pi 4B/3B+/3B/2B/B+/Pi Zero W/Pi Zero 2 W
$18.99
Compare at 9 stores
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