Below is the detailed schematic of the Differential Encoder inputs. 

Schematic:

Schematic of Differential Encoder Inputs

Notes:

The differential encoder inputs are designed to work with differential or single ended encoders.  When connecting a single ended encoder, connect it to the - input, and leave the + input unconnected.

The signal is then set to the Encoder input and MPG input.

Applies to:

8-PIN Encoder Input Connectors Pins 3-8

Encoder Inputs