| INTRODUCTION The RTU870 is a serie of compact outstations with different integrated input/output configurations designed for use in the industrial environment. The units are designed in a very compact 162 mm wide module for DIN-rail mounting (35 mm symmetrical). Dimensions conform to DIN 43880 (used for circuit breakers) thus insuring easy installation in standard installation panels and boxes widely available in the electrical industry. The RTU870 are delivered with a range of different power supply options including charger options (with a battery monitor) for an external lead acid battery, enabling the RTU to operate regardless of interruptions in the mains supply. The RTU870 has a number of integral inputs and outputs and further I/O's can optionally be added via an expansion bus. The main communication is done through the EN/IEC60870-5-101 protocol. Communication interface is RS232. The RTU870 do in general support modem dial-up features. The unit can be programmed to perform simple control sequences using an EN/IEC1131-3 IL (PLC) programming language. Programming and setup is achieved by using a standard PC connected to the programmer port, with the IOTOOL870 software package installed. The ModbusRTU protocol is used in the programming port. |