DNP-211 - DNP3 Master to Modbus TCP Server Gateway

New Products 2022-06-29



DNP3 (Distributed Network Protocol 3) is a communication protocol used between automation components. The protocol is formulated with reference to IEC 870-5. The purpose is to unify the communication method of SCADA so that SCADA can use the DNP3 protocol to communicate with master stations, remote terminal units (RTUs), and intelligent electronic devices (IEDs), etc. which are mainly used in utilities such as electric and water companies.
The DNP3 protocol can achieve certain reliability and allows reliable communications in the adverse environments that electric utility automation systems are subjected to being specifically designed to overcome distortion induced by electromagnetic interference (EMI), aging components, and poor transmission media. A large number of CRC check codes are used in the protocol to ensure the accuracy of data. It is suitable for, Data communication applications that require high security , communicate with medium speed and medium amount of data.
Modbus TCP is a variant of the Modbus family of simple, vendor-neutral communication protocols intended for supervision and control of automation equipment. Specifically, it covers the use of Modbus messaging in an “Intranet” or “Internet” environment using the TCP/IP protocols. The most common use of the protocols at this time is for Ethernet attachment of PLC’s, I/O modules, and gateways to other simple field buses or I/O networks.

DNP-211 is a gateway that supports DNP3 master and Modbus TCP server protocol conversion. As long as the master device supports Modbus TCP protocol, it can connect the existing DNP3 network with the Ethernet-based master device. For DNP3 network, DNP-211 is a DNP3 master device. It supports several commonly used data groups and variables and can communicate with slave devices. From the perspective of Modbus TCP network, DNP-211 is a Modbus TCP server, which can receive commands from Modbus TCP client, and process these commands to reply or send related DNP3 data. All DNP3 I/O data and Modbus mapping can be configured through DNP-211 utility software.


For more information, please visit the following website: https://www.icpdas.com/en/product/DNP-211