KROHNE OPTIFLUX 2000-4000-5000-6000-7300-IFC 300 Ex EN - Manual (Page 12)

1
INTRODUCTION
12
OPTIFLUX
www.krohne.com 07/2010 - 7309482600 - AD EX IFC 300 R06 en
1.5.2 Field versions
OPTIFLUX 5000 F is certified as group II, category 2 GD equipment for gas hazardous areas zone
1 and 2, gas group IIC, temperature classes T6…T3 and dust hazardous areas zone 21 and 22,
surface temperature T85...180°C.
The connection box contains terminals for the connection of the field current and electrode
circuits:
Field current terminals
Field current terminals Field current terminals Field current terminals, 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 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 for the electrode circuit is - as intrinsic safe circuit - marked with a blue O-ring.
EEx marking OPTIFLUX 5000 F "sandwich":
EEx marking OPTIFLUX 5000 F "flange":
Nominal diameter Nominal diameter Nominal diameter Nominal diameter II 2 GD
2.5...15 EEx me ia IIC T6...T3 T85...180°C
25...100 EEx de ia IIC T6...T3 T85...180°C
Nominal diameter Nominal diameter Nominal diameter Nominal diameter II 2 GD
15...100 EEx e ia mb IIC T6...T3 T85...180°C