The part no. 364698-01 Home Lighting Serial Expansion Module enables the Stewart Electronics Home Lighting Controller to interface to personal computers and host control systems. In this manner, the Home Lighting Controller may function as a lighting system manager in an integrated system environment. The serial communications port may be configured for either 9600 bps RS-232 or RS-485 operation. When connected to a host controller’s serial port, the controller provides direct access to all ALC lighting control features.
The Home Lighting Controller provides two serial communications protocols; ASCII-Link and ALC-Link. ASCII-Link is a low level ASCII character based communications protocol suitable for interfacing of systems by installation technicians in the field. ALC-Link is a high level communications protocol intended for incorporation into a 3rd party manufacturer’s controller firmware. This protocol provides access to all ALC switch operational features and individual switch status information. Refer to the Part No. 1307659 Developers Guide for detailed protocol information. Refer to the part no. HLC_SI application note for lighting control, programming and unsolicited messaging examples utilizing the ASCII character based protocol.
The Serial Expansion Module is factory configured for RS232 serial communications. The module may be configured for RS485 serial communications by moving the RS232/RS485 shunt to the RS485 position. The TRANSMIT and RECEIVE LED indicators will flash to indicate the direction of serial data flow.