CAN-2054C user’s manual (Revision 1.30, Nov/05/2014) ------
11
If the DI LED turns on, it means that the corresponding DI
channel receives an ON voltage-level digital signal no matter what the
DI channel polarity is. (User can configure the 0x6002 object to
change the polarity of the DO channel. Please refer to section 3.3 for
detail.)