KROHNE OPTISOUND 3010-3020 Ex DE - Manual (Page 16)

English
3. Technical data
Flame proofing protection intrinsic safety Ex „i“
OPTISOUND 3010/3020 C VF3*4.C***H***X are provided with intrinsically safe circuits. The
connection of these intrinsically safe circuits is carried out on terminals which are located in an Ex “i”
connection compartment.
Power supply and signal circuit
In flame proofing intrinsic safety EEx ia IIC / IIB
(Terminals no.1[+], 2[-] in Ex „i“
connection compartment, with
double chamber version in
connection compartment)
Only for connection to a certified intrinsically safe circuit
Max. values:
U
i
= 30 V
I
i
= 131 mA
P
i
= 983 mW
The effective internal inductance L
i
is negligibly small.
The effective internal capacity C
i
is negligibly small.
Adjustment and indication module
circuit:
Flame proofing intrinsic safety EEx ia IIC
(spring contacts in the electronics
compartment, additionally in the
connection compartment with the
double-chamber housing version)
For the double chamber housing version the
adjustment and indication module may be
equipped either in the electronics compartment or
in the connection compartment.
The intrinsically safe circuits are galvanically separated from parts which can be grounded.
For applications requiring category 2 equipment, the intrinsically safe supply and signal circuit may
correspond to category ia or ib; when connecting to a circuit of category ib, the flame proofing
identification is EEx ib IIC T6.
For applications requiring instruments of category 1G or 1/2 G, the intrinsically safe supply and signal
circuit must correspond to category ia.
For applications requiring category 1 G or 1/2 G equipment the OPTISOUND 3010/3020 C
VF3*4.C***H***X should be connected preferably to accessory equipment with galvanically separated
intrinsically safe circuit.
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