Chapter 1 – Product Specifications 22Industrial Modular Touch Panel PC OMNI-BT Series1.2.8 Audio ModuleFeatures Mic-in Line-out Support plug and play afterinstalling driver&reboot1.2.9 HMS ModuleFeatures 10/100 Ethernet x 2Note:a. Not include HMS I/O cardb. Europe Limitation1.2.10 COM x 4 + DIO x 16 ModuleFeatures Isolated RS-232/422/485 x 4 Digital I/O x8Note: You could use an AAEON Hi-SafeSoftware tool to adjust input or outputCOM5 COM3COM4COM6