Tripp Lite by Eaton SmartPro Advanced User Guide 614-40195—Rev 01 2344..55 CCoommmmuunniiccaattiioonn PPoorrttssTable 17. RS232/USB Communication Port Connection Steps1. Connect the RS232 (15) or USB (16) communication cable to theserial or USB port on the computer equipment.2. Connect the other end of the communication cable (15) or (16) tothe USB (5) or RS232 (6) communication port on the UPS.The UPS can now communicate with Eaton Tripp Lite Seriespower management software.You can improve the remote monitoring and power management ofthe UPS by adding a communication card compatible with theSmartPro product, see paragraph4.6 UPS Remote Control Functions.Table 18. RS232 Communication Port Contact DetailsPin Signal Direction FunctionContact characteristics (optocoupler)• Voltage: 48 V DC max• Current: 25 mA max• Power: 1.2 W1 Bat low Output Low Battery Output2 TxD Output Transmit to external device3 RxD Input Receive from external device4 I/P SIG Input -5 GNDS - Signal Common tied to chassis6 PNP Input Plug and Play7 UPS OK Output UPS OK8 BAT mode Output UPS on battery mode9 +5V Output Power supply for external signal oroptionsInterfaces and Communication