The Serial INSTEON PowerLinc Modem is a serial-based home automation interface that allows PC- and hardware-based automation controllers to control INSTEON-compatible lights, appliances, heating/air conditioning systems and alarm systems directly via the INSTEON network. This home automation interface uses simple RS-232 commands, allowing any device with a programmable serial port to send INSTEON commands easily, making controllers such as SimpleHomeNet's and Universal Devices' IP bridges instantly INSTEON compatible. Note: The controller connected to the Serial INSTEON PowerLinc Modem must remain powered on and running the controller program connected to the controller or host at all times of usage.Ideal for Developer Use Hardware developers with products that include RS232 ports can use the Serial INSTEON PowerLinc Modem to send and receive INSTEON communications. This relieves developers from embedding INSTEON chips inside their devices and provides a quick way to market without having to go through electronics re-designs or costly safety agency approvals. It also provides electronic TTL lines for direct connection to systems with embedded processors. Finally, an unregulated 12VDC at 300mA is provided to directly power a host controller. Please note that developing application and controls for the PLM is not for the casual home automation enthusiast. Due to the nature of this product, Smarthome's technical support staff cannot offer programming support for developers. We cannot assist in the troubleshooting or development of applications and/or code. Technical information on the Power Line Modem is available to INSTEON developers; click here for more information on becoming an INSTEON developer.