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Comparison between USB Relay Boards


  Device Image and link Chipset Required external power supply Relays count Relays count Temperature sensors Control via Virtual Com Port Communication protocol Keeps relay states after disconnect from computer Save relay states in EEPROM and load on boot Option for boot with predefined relays states Hardware Timers Level of resistance against USB interference Optical isolation Box version available SDK (software examples available)
USB 4 Relay - ver.1 FT245RL 4 16 USB (via FT245RL library) average
USB 4 Relay - ver.2 MCP2200 4 16 USB (CDC,HID) high

USB 4 Relay with

TCN75 sensor


4 16 1 USB (via FT245RL library) average

(only for the relays)

USB 8 Relay FT245RL 8 USB (via FT245RL library) high

(for relays only)

USB 16 Relay - ver.3 FT232RL, MCU 16 Serial or USB (via FT232L library) high

(for communication only)

USB 16 Relay

Modbus RTU

FT232RL, MCU 16 Serial, ModBus RTU high

(for communication only)



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