According to the specs, the 1AV3A is 6v to 24v, so 5v operation will be below operating parameters, they are shown as 3 wire sink device, so you will have 2 connections for power and the 3rd most likely open collector NPN. If operating into a parallel port using an auxilliary supply to get higher than 5v, then you connect the +v and common connections to your auxiliary supply, connect the auxiliary power supply common to PC port 5v common and connect the NPN sink output to your port input, you may get away without pull up resistor depending on the nature of the port input.