User manual
IU_M710P_MANUAL_05i00_ENG
Strona 31 z 36
4.
Description of communication interfaces
MUPASZ 710
plus
may be fitted with the following interfaces:
ST type optical fibre,
RS-485 / 422 (two- or four-wire),
2 x RS-485 (two- wire),
RJ45 Ethernet (twisted pair).
These interfaces are used to transfer data (in accordance with selected transmission protocol)
Depending on the transmission protocol, the data sent may contain the following information:
states of switches in the bay,
measurements,
event log,
counters,
states of binary inputs and outputs
and may allow to:
control the switches,
issue signaling cancel commands,
modify device configuration,
modify set points of protection and automatic functions,
activate device functions,
transfer inter-bay lock messages,
synchronize internal clocks with system clock,
transmit content of recorders,
reprogramming of the device.
Each version of the device is accompanied by documentation which allows to design visualization and
to control objects in the power system.
4.1.
Modem RS-485 (2-wire/ 4-wire connection)
Depending on the connection point of the device within the network, following types of connections are
used:
Type I
– intermediate position – without RT resistor matching wave impedance of the line;
Type II
– extreme position – with RT resistor matching wave impedance of the line.
Above connection types are implemented in the by means of suitable wiring of 10-pin WAGO type 734-110
connector.
Depending on device position in RS-485 network, following types of wiring of communication ports are used:
Type I (2-wire)
Fig. 4.1.1. Intermediate position of the device in 2-wire communication network