Turck has expanded its BL20 I/O system with a new gateway for serial Modbus communication. The gateway supports both the Modbus RTU as well as the ASCII protocol. The user can also choose between either RS485 or RS232 for the physical interface. Push-in terminals for connecting the fieldbus and power supply cables quickly and directly eliminate the need for any time consuming preparation of the typical 9-pin SUB-D connectors. The most important parameters, such as baud rate, address assignment, bus termination and RS232/RS485 can be set easily on the gateway using the DIP switches. Other functions such as ASCII mode and other baud rates can be configured using FDT/DTM with Pactware. A Mini-USB port can be used as a service interface.
Embedded in the Banner DX80 wireless system from the Turck portfolio, the new gateway makes it possible to implement cable-free Modbus RTU communication. Thanks to the extended temperature range from -25…+60 °C, the gateway can also be used in outdoor control cabinets. The electronics are coated with a protective lacquer to provide protection from condensation. Up to 32 I/O modules can be connected to the compact IP20 gateways, and the BL modules can also be used for connecting RFID read/write heads. The modular concept enables users to deploy the same electronic modules in different fieldbus systems.