Sensor – Burkert Type 8690 User Manual
Page 10
10
Basic safety instructions
electrical data
The pilot valve with ignition protection type intrinsic safety Ex ia IIC
must only be connected to certified, intrinsically safe electric circuits
with the following maximum values.
Explosion group
IIC
Category
ia
Temperature class
T6
Max. permissible input voltage (Ui)
35 V
Max. permissible input current (Ii)
0,9 A
Max. permissible input power (Pi)
Power supply voltage:
For the maximum permissible voltages and the corresponding
maximum permissible short-circuit currents for the respective
explosion groups, please see standard EN 60079-11.
Some value pairs for the explosion group IIC are listed as an
example for every ignition protection type.
Valve with ignition protection type intrinsic safety Ex ia IIC.
Voltage
value
[V] = ui
15 18
20
22
25
28
30
35
current
value
[a] = ii
0,9 0,44 0,309 0,224 0,158 0,120 0,101 0,073
Tab. 3: Value pairs
Sensor
electrical data
Supply and signal circuit:
In ignition protection type intrinsically safe Ex ia IIC, for connection
only to certified intrinsically safe circuits with the following max.
values:
permissible
ambient
temper-
ature
category
temper-
ature
class
ui [Vdc] ii [ma]
pi [mW]
+55 °C
II 2G
T6
20
60 mA
200
Tab. 4: Temperature class and circuit parameters
Effective internal capacitance Ci and effective internal inductance Li
ci [nf]
li [µh]
150
150
Tab. 5: Effective capacitance and inductance
english
Type 8690 Ex