Manual

A full datasheet for the relays used on the USB-RLY16L is here: HFE20 datasheet
First Step - Install the Driver
The USB-RLY16L module uses the Microchip PIC18F14K50 to handle all the USB protocols. Before
using the USB-RLY16L you will need to download the Devantech inf files and unzip them into a
temporary folder. Connect the USB-RLY16L and windows will detect it and ask for the drivers. Point
windows to the inf folder and it will install the driver. The USB-RLY16L will now appear as a com
port.
Which COM port?
After installing the drivers, and plugging in the USB-RLY16L module to a spare USB port, you will
want to know which COM port it has been assigned to. This will vary from system to system depending
on how many COM ports you currently have installed. To find out where it is, right click on your "My
Computer" desktop icon and select the "Device Manager" tab. Now scroll down and open the "Ports
(COM & LPT)" tab. You should see the USB serial port listed - COM2 in the example below. If you
want to change the COM port number - just right click on it, select properties, select advanced and
select the COM port number from the available list. The COM port may be left at the default baud rate
etc, because they are not actually used - there is a direct USB connection into the processor.