HomeWorks Technical Reference Guide International Edition - Lutron

P5 ProcessorsDB9 female connector for RS-232 communicationPinNumberPinNameDescription forProcessor ConnectorRequired forHardwareHandshakingRequired forSimpleCommunications(HardwareHandshakingDisabled)1 DCD Data Carrier Detect (input)2 TXD Transmit Data (output) X X3 RXD Receive Data (input) X X4 DSR Data Set Ready (input) X5 GND Ground X X6 DTR Data Terminal Ready (output) X7 CTS Clear To Send (input) X8 RTS Request To Send (output) X9 RI Ring Indicate (input)Figure 3 - RS-232 Port SpecificationsFigure 4 - Ethernet Port and Cable ConfigurationPIN Processor Ethernet Hub/Switch1 Transmit +Ve Receive +Ve2 Transmit -Ve Receive -Ve3 Receive +Ve Transmit +Ve4 No Connection No Connection5 No Connection No Connection6 Receive -Ve Transmit -Ve7 No Connection No Connection8 No Connection No ConnectionCrossover Cable ConfigurationA crossover cable is used when connecting theprocessor directly to a laptop or other non-hubdevice (A/V systems, HVAC, etc.)1234 NC5 NC67 NC8 NC123NC 4NC 56NC 7NC 8COMPONENTSTechnical Support: hwisupport@lutron.com8.7