Sumtor Control Board - homing/limit switches

[Roy-J]

Hi,

I have a Chinese 6040 4 Axis CNC router that I would like to fit homing/limit switches to. The mechanical side of things I can manage but for me it's not quite the same with the electronic side of it. So I am hoping I may be able to find the answers to my questions within this forum.

I have attached a photo of the Mach 3 USB control board, the only identifying mark is SUMTOR. I have visited their website but the board is not shown within their site, an email request to both Sumtor and the machine supplier has brought no response.

My questions are as follows.
1) Can anyone identify the model of this board?
2) Is there the facility on this board and if so where to connect the homing/limit switches to?
3) If there is the facility to connect homing limit switches could this board also support optical limit switches?

Kind Regards

Roy