1
INTRODUCTION
10
OPTIFLUX
www.krohne.com
07/2010 - 7309482600 - AD EX IFC 300 R06 en
1.4.2 Field versions
OPTIFLUX 2000 F / 4000 F is certified as group II, category 2 GD equipment for gas hazardous
areas zone 1 and 2, gas group IIC, temperature classes T6 (or T5) ... T3 and dust hazardous areas
zone 21 and 22, surface temperature T85
…
150/160/180
°
C.
The connection box contains terminals for the connection of the field current and electrode
circuits:
Field current circuit
Field current circuit
Field current circuit
Field current circuit, in type of protection "Increased safety" (Ex e), terminals 7, 8 and 9:
U < 40 V (switched DC voltage, alter40 and -40 V), I = 125 mA (injected square wave
current),
Electrode terminals
Electrode terminals
Electrode terminals
Electrode terminals, in type of protection "Intrinsic safety" (Ex ia), terminals 1, 2, 3 and 4:
U
i
= 20 V, I
i
= 175 mA, C
i
≈
0 nF, L
i
≈
0 mH.
The before mentioned intrinsically safe circuits shall, from the safety point of view, be
considered to be connected to ground.
The cable gland
cable gland
cable gland
cable gland for the electrode circuit is - as intrinsic safe circuit - marked with a blue O-ring.
EEx marking OPTIFLUX 2000 F / 4000 F:
Nominal diameter
Nominal diameter
Nominal diameter
Nominal diameter
II 2 GD
10...20 ("me")
EEx me ia IIC T6...T3 T85...150
°
C
25...150 ("d")
EEx de ia IIC T6...T3 T85...180
°
C
200...300 ("qe")
EEx qe ia IIC T6...T3 T85...150
°
C
350...3000 ("e")
EEx e ia IIC T6...T3 T85...160
°
C
Optional:
Optional:
Optional:
Optional:
25...150 ("qe")
EEx qe ia IIC T5...T3 T85...180
°
C
