VEGA VEGATRENN 548 V Ex - Manual (Page 3)

VEGATRENN 548 V Ex 3
Product description
1 Product description
1.1 Function, configuration and
mounting
Function
Ex-separator VEGATRENN 548 V Ex is used
for intrinsically safe, galvanically isolated
supply of up to 15 digital (VBUS) presure
transmitters. At the input side it is connected
to the tow-wire-VBUS-line of the signal
conditioning instruent and provides at the
output side 15 intrinsically safe ia-circuits.
The Ex-separator can be used in conjunction
with the following signal conditioning
instruments or sensors:
- VEGAMET 514 V and 515 V
- EV-card of VEGALOG 571
- pressure transmitter D80, D81, D84 or D86
in Ex-version with VBUS-electronics E23V
The ia-circuits are divided into 3 branches, up
to five sensors can be connected to each
branch. The ia-circuits are galvanically
connected and a fuse per branch is used for
safety reasons.
The intrinsically safe circuits are galvanically
isolated from the not intrinsically safe circuits.
Configuration
The Ex-separator VEGATRENN 548 V Ex is
designed in 19“-technology with 5 TE (=
25,4 mm). The connection is made via a multi-
ple plug acc. to DIN 41 612.
Mounting
There are the following mounting possibilities:
- in housing type 506 with VEGAMET
- in carrier BGT 596 Ex with VEGAMET
- in carrier BGT LOG 571 *
) with VEGALOG
Example 1:
In housing type 506 with VEGAMET
Fig. 1.1: Block diagram of the Ex-separator
Power supply
Intrinsically safe ia-
circuits
Branch 1
Branch 2
Branch 3
Signal
conditioning
instrument
(VBUS)
Electronics
VEGAMET 515V VEGATRENN 548VEx
Not-Ex-area Ex-area
VBUS ia IIC-
circuits
Supply
VEGATRENN
548 V Ex VEGAMET
514 V
515 V
*) If several VEGATRENN 548 V Ex are used, it is
recommended to separate them into the cheaper
BGT 596 Ex.