 The Modbus protocol is a communication protocol that is based on a master / slave or client / server architecture. Not only in industrial automation has Modbus developed into a significant standard, but in building automation, too, it is gaining in importance since it is an open protocol. You can use Modbus to connect one master (e.g. one PC) to multiple slaves (e.g. measuring and control systems). There are two versions: One for the serial interface (EIA-232 and EIA-485) and one for Ethernet.The DIGICONTROL ems4.SM03B interface module enables connection to various bus systems on the basis of the physical interface RS-232 or RS-485. In addition to the RS-232 / RS-485 interface, the ems4.SM03B contains another CAN bus interface for connecting external devices, e.g. WILO pumps having a CAN bus IF module. At the time of delivery, this module contains precisely this connection, but it can be loaded with other firmware using webCADpro as and when required (e.g. MODBUS RTU Master). |
 DIGICONTROL ems4.SM03B |
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