The Lon Star-Coupler RER 111 is used to interconnect the nodes in a LonWorks net

work. It offers a variety of configuration options. As standard the RER 111 unit pro

vides the following:

• Single or double auxiliary power supply units with input voltage ranges 80…265 V

ac/dc or 18…80 V dc

• Input/Output (I/O) Card

• Mother Board

• 9 slot placements for option cards

• The LON Clock Master option card SLCM provides means for connection to a clock

reference device and performs time synchronization on LON.There are five sepa

rate time synchronization methods for different types of bay level devices and for

different accuracy requirements. The SLCM option card includes an internal

clock to generate various synchronization messages and signals in order to synchro

nize other devices on the LON network.