ABB Lon Star-Coupler RER 111

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 following five option cards are available:

• The Fibre-Optic Option Card SFIBER pro vides three fibre-optic transceiver pairs for

the interconnection of bay level devices,connection between two RER 111 modules

equipped with Fibre-Optic Option Cards or between a RER 111 module and higher

level devices e.g. MicroSCADA.

• The RS-485 Option Card SRS485 provides a means of connecting LON bus

devices using the RS-485 interface to the LonWorks network. The card also com

prises a fibre-optic transceiver pair.

• The SLTA Option Card SSLTA provides the interconnection between higher level

devices (e.g. monitoring terminals, PC, etc.) and the LonWorks network.

It can also provide the interconnection between RER 111 modules by using the fibre-optic

transceiver pair.

• The Router Option Card, SROUT, provides connection to devices using twisted

pair (TP/XF-78 or TP/XF-1250) transceiv ers and / or using fibre-optic transceiver

pairs. It also provides a means by which an overall system can be divided into multiple

subsystems.

• The Double Connection Option Card SREDU provides a means for connecting

devices together by using double connec tions. This method enables the use of two

fibre-optic transceiver pairs to connect to any device supporting double connection.

In the event of a fault in one fibre-optic connection, this connection is still able to

receive and transmit data to devices.

• 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.