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| 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 |
 |
FT245RL |
|
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) |
|
|
