The Transmitting Synchroniser provides the fieldbus carrier signal and an RS-485 port (Modbus -standard) for communication with the PLC or SCADA system for monitoring and control purposes. The transmitting Synchroniser is unlike other Synchronisers in its capability to transmit data over the Ringline via commands from the controlling PLC/SCADA. This enables remote control of digital processes via field receivers. The number of channels (digital data points) in the system and Ringline baud rate are selectable via programming software used in configuring the Synchroniser to establish optimum update times. Modbus address and baud rate are also configurable via shunts on the board.

The RLSYNCTX is a 2nd generation Synchroniser specifically designed to maximise common-mode noise immunity and provide reliable operation in harsh industrial environments in the presences of variable speed drives and high power switching. The technology has been in use at various sites throughout Australasia since 2006.