K8090 8-channel usb relay card

Do you have any information on how the 10-way header next to the Manual Operation buttons can be connect. Is it contact closure or voltage driven? If the latter what is the voltage range. Do you have any connection diagrams or written information on it?

They are contact closure driven. Do not apply any voltage !

Pins 9 and 10 are GND and you can use these buttons NO to all other pins. I used a small diode matrix to control relays with more dedicated buttons, but in utime analysis, it is far better to use a small program like the demo attached to the Kit