How to wire TTL encoder to FP Quad510

So I've got power supply going to the +wire of the encoder from terminal 4(Quad510)

-From the encoder to terminal 19

Checking the voltage with multimeter terminal 4 to 19 or COM shows 4.99VDC

But through the encoder gives about 3.5VDC

I'm not getting any count on Index0 with the way I have it setup(Range is 0 to 65535. LSB reset on index)

I'm not sure if I have the wiring set up properly.

Not sure if I have the Quad510 settings configured properly.

Thank you for your help!