GE Multilin F60 Feeder Protection System 2-7
2 PRODUCT DESCRIPTION 2.1 INTRODUCTION
2
2.1.3 IEC 870-5-103 PROTOCOL
IEC 870-5-103 is a companion standard to IEC 870-5 suit of standards for transmission protocols. It defines messages and
procedures for interoperability between protection equipment and devices of a control system in a substation for communi-
cating on a serial line.
The IEC 60870-5-103 is an unbalanced (master-slave) protocol for coded-bit serial communication, exchanging information
with a control system. In the context of this protocol, the protection equipment is the slave and the control system is the
master. The communication is based on a point to point principle. The master must be able to interpret the IEC 60870-5-
103 communication messages.
The UR implementation of IEC 60870-5-103 consists of the following functions:
• Report binary inputs
• Report analog values (measurands)
• Commands
• Time synchronization
The RS485 port supports IEC 60870-5-103.
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