beautypg.com

Sensor – Burkert Type 8690 User Manual

Page 10

background image

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)

see “Tab. 1”

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