Beijer-electronics iX Panel T70 EN Manuale Utente Pagina 21
- Pagina / 23
- Indice
- SEGNALIBRI
Valutato. / 5. Basato su recensioni clienti
Additional Installation Tips
6.6 GalvanicIsolation
USB
USB
RS232RS422/485
+24 V DC
0 V
Filter
DC/DC
galvanic isolation
VCC
0 V (GND)
DC/AC
CFL
Ethernet
Internal electronic
1.5 m
5356
The operator panel has galvanic isolation against the 24 V DC feed but no galvanic
isolation between the communication ports for RS232, RS422/485 and USB.
Only the Ethernet connection has galvanic isolation.
* *
*
***
**
*
Operator panel Modular controller Printe
r
PCPC
Not same ground potential
* = Internal 0 V (GND) connection
Power CPU COM COM2
RS422 RS232 USB
5357
When a PC is connected to the panel, the panel’s internal 0 V (G
ND) will be
connected to the protective ground via the PC.
A number of USB devices can have the shield connected together with the
protective ground. Here, the panel’s 0 V (GND) is connected to the protective
ground when, for example, a USB memory stick, keyboard or similar device is
plugged in.
If a number of units are connected that have a 0 V a
nd a ground connection, and
these are connected to various grounding poin
ts, there is a substantial risk of
problems. Grounding currents go through com
munication cables, the rear plate
of the controller, and internally in th
e operator panel, and can cause errors.
Use external units to improve communication and achieve galvanic is olation.
Westermo has good industry-standard insulators that are also insulated from the
24 V DC feed.
Note:
Itisvery importanttomakesurethatthe24 Vfeedintheexternalinsulationunitisnot
connectedtooneoftheco m municationoutlets. Ifitdoesnothave100%insulation
againstthe24Vfeed,disturbancesandgroundingcurrentsfromthe0Vonthe24V
sidewilldisruptcommunication.
Usingthistypeofunitsolvesoneproblembutcreatesalargerproblem ! Asubstandard
installationmayworknow,butproblemsmayarisewhenotherdevicesareconnected.
BeijerElectronics, MAEN990A
21
- InstallationManual 1
- Foreword 2
- Contents 3
- 1SafetyPrecautions 4
- 1.3 DuringUse 5
- 1.4 ServiceandMaintenance 5
- 1.5 DismantlingandScrapping 5
- 2Installation 6
- 0.5 - 1.0 Nm 7
- – Connect cable A 8
- – Connect cable C 8
- – Connect cable D 8
- 2.2.1 ModeSwitches 9
- 3TechnicalData 10
- 4 ChemicalResistance 11
- 4.2 TouchScreenandO verlay 12
- 4.2.2 TouchScreenSurface 13
- 4.2.3 AutoflexEB 13
- 5 Opera torPanelDrawings 14
- 5.2 iXPanelT70Outline 15
- 6 AdditionalInstallationTips 16
- BeijerElectronics, MAEN990A 17
- Metal cabinet Metal cabinet 18
- Shielded cable Shielded cable 18
- 6.4 AmbientTemperature 19
- 6.5 Safety 20
- 6.6 GalvanicIsolation 21
- Inside operator panel 22
Prodotti e manuali riguardandi Pannello di controllo Beijer-electronics iX Panel T70 EN
(23 pagine)
(27 pagine)HP Serveur lame HP ProLiant BL685c manuali
Manuali dei proprietari e guide per l'utente per Hardware del computer HP Serveur lame HP ProLiant BL685c.
We fornisce 1 manuali pdf HP Serveur lame HP ProLiant BL685c per scaricare gratuitamente in base al tipo di documento: Manuale Utente
Commenti su questo manuale