VCC 12-24 volt is supply voltage from the power supply. link
GND is a common ground from the power supply. link
ANG/TTL ground is a ground for the logic and/or control circuit. see link above for grounds.
TTL in is transistor logic control (positive side of control voltage) link
ANG in 0-5 volt is positive control for analog voltage. link
Hope this helps. it really doesn’t appear to be to complicated.
P.S. you would only need one type of control voltage in. Choose either Analog or TTL to supply control voltage.