Chapter 2 Installation 232.15 Serial ports (CN18, CN13)The PCM-5823 Series offers two serial ports: one RS-232 and oneRS-232/422/485. These ports allow you to connect to any serialdevice (a mouse, printers, etc.) or communication network.2.15.1 COM1 RS-232 port (CN18)The serial port connectors are mounted on the bottom edge of thecard. The 9-pin D-SUB connector to the left of the card is theRS-232 port.2.15.2 COM2 RS-232/422/485 selection (CN13)The secondary port located above COM1, consists of a 14-pin,dual-in-line, male header and can be configured to operate inRS-232, RS-422, or RS-485 mode. This is done via SW2 (pin1 topin2)Table 2-3 COM2 select (SW2)Result SW2-1 SW2-2 SW2-3*RS-232 on off offRS-422 off on offRS-485 off off on2.14 AC 97 Audio interfaces (CN2, optional)The PCM-5823 Series provides an optional module, whichprovides 16-bit CD quality recording and playback as well asOPL3 compatible FM music. It is supported by all major operatingsystems and is completely compatible with Sound Blaster Pro.Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com