VEGA Conductive electrodes - Manual (Page 10)

10 Conductive measuring system
Product description
Measuring data input, Ex-technical data
Signal circuits in classification intrinsic safety EEx ia IIC
Max. values
- U
O
10,6 V
- I
K
8 mA
- P 20 mW
Characteristics linear
Inner effective inductance negligible
Inner effective capacitance negligible
Max. permissible outer inductance 5 mH
Max. permissible outer capacitance 570 nF
The intrinsically safe circuits are reliably galvanically separated from the not-intrinsically
safe circuits up to a peak value of the nominal voltage of 375 V.
The intrinsically safe circuits of channel 1 and channel 2 are reliably galvanically isolated.
Relay outputs
Number 2
Mode overfill protection (A) and dry run protection (B)
changeover for each output (channel) separately
Contact 1 spdt per output
Contact material AgCdO and Au plated
Turn-on voltage min. 10 mV
max. 250 V AC or 250 V DC
Switching current min. 10 µA
max. 3 A AC or 1 A DC
Breaking capacity max. 750 VA or 54 W
Transistor outputs
Number 2 (synchronously switching with relay outputs)
Galvanic isolation floating
Turn-on voltage U
B
= max. 36 V DC
Switching current I
B
= max. 60 mA
Voltage loss on the transistor U
CE
= approx. 1,5 V at I
B
= 60 mA
Blocking current I
O
< 10 µA
Integration time
Fixed value approx. 500 ms
Ambient conditions
Permissible ambient temperature -20°C … +60°C
Storage and transport temperature -40°C … +70°C