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Repeater quadruples sensor transmission distances

05 July 2015

Carlo Gavazzi's SB2REP230 repeater quadruples transmission distance when used in systems with high loads in a typical building automation application.

The Smart Dupline SP2REP230 is a 115/240Vac powered repeater and isolator. The repeater regenerates the voltage levels of the Dupline carrier signal and provides an output load capability of 300mA complete with isolation between the primary and secondary sides. This means that the primary side will not be affected by a bus short-circuit on the secondary side. The SP2REP230 supports automatic restart within ten seconds after the short-circuit has been removed.

Only 2 DIN wide, the SP2REP230 operates over a temperature range of 0 to +50°C, carries CE marks and is cULus approved according to UL60950.

The Smart Dupline bus wiring topology enables installatiosn to be carried out using the lowest cost route rather than just multi-dropping from sensor to sensor. A simple unscreened two-core bus cable is all that is required to make the Dupline connection, while a four-core cable can be used to carry power along with the Dupline bus if required by the sensors.

Environmental sensor data are converted from 0/4-20mA to Dupline locally before being transmitted back over the Dupline network to the controller.

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