Application Conditions - SICK NAMUR LFV 310 Instructions

Supply and signal circuit
Terminals 1[+], 2[-]
The intrinsically safe circuits are electrically separated from parts which can be grounded.
For applications requiring instruments of category 2G or 1/2G, the intrinsically safe power supply
and signal circuit can correspond to protection class ia or ib. For connection to a circuit of category
ib, the ignition protection type identification is Ex ib IIC T6.
For applications requiring instruments of category 1G, the intrinsically safe power supply and signal
circuit must be in conformity with category ia.
For applications requiring instruments of category 1G the LFV 310/330.C******N/W** is preferably
connected to appropriate instruments with electrically isolated, intrinsically safe circuits.
Tip:
Ignition protection type identification: II 2G Ex ia IIB T6; II 2G Ex ib IIB T6, II 1G Ex ia IIB T6
resp. II 1/2G Ex ia IIB T6 in case of power supply via a circuit of group IIB.
3.2

Application conditions

Permissible ambient temperatures
On the sensor - category 1G
Temperature class
Ʋ T6
Ʋ T5, T4, T3, T2, T1
On the sensor - category 1/2G
Temperature class
Ʋ T6
Ʋ T5
Ʋ T4
Ʋ T3 without temperature adapter
Ʋ T3 with temperature adapter
Ʋ T2, T1 with temperature adapter
6
In ignition protection type intrinsic safety Ex ia IIC/IIB
Only for connection to a certified, intrinsically safe circuit.
Maximum values:
•
U = 20 V
i
•
I = 103 mA
i
•
P = 516 mW
i
L = negligibly small
i
In the version with fix mounted connection cable, L
55 µH/m must be taken into consideration.
C = 2,2 nF
i
In the version with fix mounted connection cable C
= 58 pF/m and C
i wire/screen
into account.
-20 ... +51 °C
-20 ... +60 °C
-20 ... +85 °C
-20 ... +100 °C
-20 ... +135 °C
-20 ... +150 °C
-20 ... +200 °C
-20 ... +250 °C
= 270 pF/m must be also taken
=
i
i wire/wire
LFV 310/330