VEGA VEGALOG 571 EP (Ex) - Manual (Page 7)

3 Product description
3.1 Configuration
The scope of delivery encompasses:
l
19" module card VEGALOG 571 EP
l
Documentation
-
this operating instructions manual
-
Ex-specific "Safety instructions" (with Ex-versions)
-
if necessary, further certificates
3.2 Principle of operation
Together with the VEGALOG 571 processing system, the EP
card (input Profibus) is used as input card for Profibus PA
sensors. All VEGA Profibus PA sensors can be connected.
Instruments of other manufacturers can be used if they support
the Profibus-PA AI profile (continuous sensors). The DI profile
for switching instruments, however, is not supported.
The following two versions are available:
l
EP card, for max. 15 Profibus PA sensors
l
EP Ex card, for max. 10 Profibus PA sensors in Ex area
The EP card is used as input card for Profibus PA sensors. It
recognises VEGA sensors by means of their serial number and
assigns automatically a bus address. For instruments of other
manufacturers, the Profibus address must be assigned
separately on each instrument as usual.
The voltage supply of the sensors, the sensor measuring
signals as well as the parameter adjustment commands are
transmitted on the same bus cable.
In conjunction with the communication card VEGACOM 557
Profibus DP, which occupies only one address on the Profibus
DP, the VEGALOG 571 processing system acts like a link.
The EP(Ex) card forms the master for the Profibus PA, the DP
card a slave on the Profibus DP.
The module card is powered by the common power supply unit
of the VEGALOG system.
You can find detailed specifications on voltage supply in
chapter "Technical data" in the "Supplement".
Scope of delivery
Area of application
Functional principle
Supply
VEGALOG 571 EP (Ex) - Input card Profibus PA 7
Product description
25681
-
EN
-070529