Introduction, 2 field versions – KROHNE OPTIFLUX 2000-4000-5000-6000-7300-IFC 300 Ex EN User Manual

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INTRODUCTION

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, in type of protection "Increased safety" (Ex e), terminals 7, 8 and 9:
U < 40 V (switched DC voltage, alternately +40 and -40 V), I = 125 mA (injected square wave
current),
Electrode terminals

Electrode terminals

Electrode terminals, in type of protection "Intrinsic safety" (Ex ia), terminals 1, 2, 3 and 4:
U

= 20 V, I

= 175 mA, C

≈ 0 nF, L

≈ 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 for the electrode circuit is - as intrinsic safe circuit - marked with a blue O-ring.

EEx marking OPTIFLUX 2000 F / 4000 F:

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:

25...150 ("qe")

EEx qe ia IIC T5...T3 T85...180°C