27• CN4 : CD_AUDIO INPUT Connector (type 2)PIN NO. DESCRIPTION1 JCD_L2 GND3 GND4 JCD_R• CN38 : Audio ConnectorThis is the output port of your Sound System. Pin 1-2-3 and 5-6-7can be connected to loudspeaker. Pin 9-10-11 can be used as inputport if it is connected to the earphone jack of your CD. Pin 15-16 isfor microphone.PIN NO. DESCRIPTION PIN NO. DESCRIPTION1 LINE OUT R 2 GND3 LINE OUT L 4 GND5 LINE OUT R 6 LINE OUT L7 GND 8 GND9 LINE IN R 10 LINE IN L11 GND 12 GND13 N/C 14 N/C15 MIC IN 16 GNDNote: these connectors (CN3, CN4, CN38)are not available on POS-566L3.14 Isolated Digital I/O ConnectorPOS-566/566L has 4-bit IN and 4-bit OUT built-in digital I/Oconnector. The connector type is DINKLE ED350V-10P. Anexternal power supply to the connector’s pin-9 and pin-10 is neededto activate the digital I/O circuit. The external power supply’s DCoutput should be connected with POS-566/566L’s power supply ateither 5V, 12V or GND to isolate POS-566/566L main system andthe external I/O device.In case that you cannot find any external power supply to activatethe digital I/O, the 5V or 12V of the system’s power supply can beused. Under this condition, your digital I/O is not isolated.