WLS-9163 Ground Terminal Connection

Hello,

The manual for the WLS-9163 says on page 9 that the ground terminal of the device should not be attached to the common terminal of the C Series I/O module.

Will problems arise if I connect the common terminal of the I/O module to the ground terminal of the WLS-9163?

http://www.ni.com/pdf/manuals/372488c.pdf

Thanks in advance for the help.