The R15PL_USB USB Relay connects to your computer's USB port using a standard USB cable. The board mounts as a virtual COM port, send
your commands to the COM port and control the relay! USB connections offer excellent communication, speed and reliability through any
available COM port at any standard baud rate.
R25PL_USBS The Ideal Choice
The R25PL_USB USB Relay allows you to program in almost any language and has the ProXR Command Set, the industry leading command set
for controlling the relay and reading the inputs on the board. Commands can be as simple as turning on/off each relay individually and
as complex as adding delays and other features to the command such as flashers, grouping relays, and controlling banks of relays at once.