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Verfügbare Sprachen
Verfügbare Sprachen
Relay outputs: (terminals 3, 4, 5, termi-
nals 6, 7, 8), switching capacity
LFV 3*0.D******T/V** (electronics T)
Connection voltage: (terminals 1[+], 4[-]) 10 ... 55 V DC
Signal output: transistor output (terminals
2[+], 3[-])
LFV 3*0.D******N/W** (electronics N)
Connection voltage: Signal current (ter-
minals 1[+], 2[-])
The metallic parts of the level switches are electrically connected with the internal and the external
earth terminals.
4
Application conditions
Permissible ambient temperature
For use as category 1/2G instrument
Caution:
The process temperature shall not bring the enclosure of the electronics compartment above
the permitted (see table below) ambient temperature range.
Temperature class
T6
T5
T4
T3, T2, T1
T3
T2, T1
-50 °C
(-58 °F)
Fig. 1: Ambient temperature - Process temperature
1
Process temperature in °C (°F)
2
Ambient temperature in °C (°F)
3
Temperature range with temperature adapter
6
AC max. 253 V, 3 A, 750 VA
DC max. 253 V, 1 A, 54 W
DC max. 55 V, 400 mA
NAMUR switch amplifier according to IEC 60947-5-6
Process temperature
-40 ... +78 °C
-40 ... +93 °C
-40 ... +128 °C
-40 ... +150 °C without temperature adapter
-40 ... +193 °C with temperature adapter
-40 ... +250 °C with temperature adapter
2
70 °C
(158 °F)
40 °C
(104 °F)
0 °C
(32 °F)
50 °C
(122 °F)
-40 °C
(-40 °F)
3
100 °C
150 °C
200 °C
(212 °F)
(302 °F)
(392 °F)
Ambient temperature on
the housing
-40 ... +70 °C
-40 ... +70 °C
-40 ... +50 °C
-40 ... +40 °C
-40 ... +70 °C
-40 ... +70 °C
1
250 °C
(482 °F)
LFV 310, 330
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