ITR MUPASZ 710 plus - 4. Description of communication interfaces; 4.1. Modem RS-485 (2-wire; 4-wire connection)

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