VEGA VEGATRENN 548 V Ex - Manual (Page 5)

VEGATRENN 548 V Ex 5
Product description
1.2 Technical data
Power supply
Operating voltage U
nenn
= 24 V AC (20 … 53 V), 50/60 Hz
= 24 V DC (20 … 72 V)
Power consumption approx. 4 W, approx. 6 VA
Fuse 1 A, slow-blow
Signal conditioning instrument circuit
For connection to signal conditioning instrument VEGAMET 514 V,
515 V or EV-card of VEGALOG 571
Input voltage U
nenn
= 25 V DC with VEGAMET
= 24 V DC with EV-card VEGALOG
The signal conditioning instrument circuit must only be connected to instruments with an
operating votlage less than 250 V.
Sensor circuit
Number 3 branches with 5 sensor current circuits each
Sensors hydrostatic pressure transmitter with
electronics type B (VBUS)
Voltage at 5 mA approx. 15 V DC, at 25 mA approx.
13,5 V DC
Current limitation at approx. 30 mA, shortcircuit proof
Fuse per circuit 1 fuse 40 mA, slow-blow
Connection line 2-wire (standard line) * )
Resistance per conductor max. 15
Ω
Line length max. 1000 m
Sensor circuits, Ex-technical data
Classification [EEx ia] IIC, [EEx ia] IIB, [EEx ib] IIC, [EEx ib] IIB
Max. values (per branch)
- voltage
U
O
- 18,2 V
- current I
O
- 270 mA
- efficiency P
O
- 926 mW
Characteristics linear
EEx ia IIC EEx ia IIB EEx ib IIC EEx ib IIB
Max. permissible outer inductance L
a
0,41 mH 1,8 mH 0,41 mH 1,8 mH
Max. permissible outer capacitance C
a
83 nF 384 nF 290 nF 1300 nF
The intrinsically safe sensor current circuits are reliably galvanically isolated from the not
intrinsically safe circuits up to a peak value of the nominal voltage of 375 V.
Indicating elements
LED in front plate green on: operating voltage on
* ) screened cable is recommended for electromagnetic interferences.