Beijer-electronics T15BR EN Manual de usuario descargar pdf (Pagina 26)

Additional Installation Tips

6.6 GalvanicIsolation

Internal electronics

VCC

0 V (GND)

Filter

+24 V DC

0 V

galvanic

isolation

galvanic

isolation

RS422/485 RS422 USB USBUSB

Ethernet

10 nF

The communication ports COM1 and COM2 have built-in galvanic isolation

from the terminal and the input power supply. The communication port grounds

are bonded to protective earth ground and therefore to one another. Both Ethernet

ports have galvanic isolation as well. There is no galvanic isolation between the

terminal and the input power supply. If galvanic isolation is required between the

terminal and the power supply an external isolation device is required.

Caution should be taken when connecting peripherals to the terminal. Many

peripherals including USB devices will bond the terminal’s signal ground (0 V) to

the protective earth ground. Bonding signal ground and protective earth ground

may increase e lectrical emissions and introduce communication errors.

Operator panel

Modular controller

Printer

Different ground potential

= Internal 0 V (GND) connection

galvanic

isolation

RS232RS422/485

USB

USB device

Power CPU COM COM2

Note:

It is very important to make sure that the 24 V feedin the external insulation unitis not

connected to one of thecommunication outlets. If it does not have 100% insulation

againstthe 24 V feed,disturbancesand groundingcurrentsfrom the0 Von the24 V

side will disrupt communication.

Using this typeof unitsolves o ne problem but creates alarger problem! A substandard

installationmaywork now, but problemsmayarise when other devicesare connected.

BeijerElectronics, MAEN165

1 2 ... 21 22 23 24 25 26 27 28

Comentarios a estos manuales

Sin comentarios

Beijer-electronics T15BR EN Manual de usuario Pagina 26

Comentarios a estos manuales

Relacionado con productos y manuales para Panel De Control Beijer-electronics T15BR EN