These new board came as a request from many that needed an easier way
of using modbus and integrating it with a pendant.

http://www.cnc4pc.com/Store/osc/product_info.php?products_id=184

Features:

28 Discrete Inputs, 28 Discrete Outputs, 4 Analog Inputs and 4 Analog Outputs.

Fully Optoisolated.

Has a DB25 connector for connecting pendants provided by CNC4PC.

Has a relay that reflects the status of the e-stop button on the pendant.

Jumpers for optionally bypassing the optoisolators
I apreciate your comments.

Thanks,

Arturo Duncan