Endress+Hauser FTS20 Bedienungsanleitung Seite 22

Technical data FTS20 (NAMUR)
Measuring system
Switching element
Power supply
Operating current
Reverse polarity protection
Switching angle
Process temperature range
Ingress protection
Process pressure
Density of liquid
E
Floating body material
Cable material
Minimum cable length between fixing
and floating body
Ex approval
Ex ingress protection
Ex data
8
Comprising an FTS20 floating switch and an isolating amplifier, e.g.
Endress+Hauser Nivotester FTL325N
Inductive proximity switch with switching ball, closed when floating
8.2 V ±2 V
<1.2 mA unswitched; >2.1 mA switched
Yes
Switching points top/bottom ±12°, measured to the horizontal
Dependent on cable material:
PVC and PUR: +5...+70 °C, CSM: –20...+85 °C
DIN EN 60529, IP68 (immension depth: 20 m / without temporal limit)
3 bar at 20 °C
0.8 g/cm
3
Polypropylene (PP)
PVC, CSM: standard length 5 m and 20 m, cross section 2 x 0.75 mm
PVC: 50 mm PUR: standard length 5 m and 20 m, cross section 2 x 0.50 mm
PUR: 100 mm
CSM: 100 mm
TÜV 01 ATEX 1709
0
II 2G Ex ia IIB T5
T5 (T = 70 °C)
a
Voltage Ci 16 V
Current Ii 52 mA
Power Pi 180 mW
Inductance Li 1 mH
Capacitance Ci 153 nF
2
2
T4 (T = 70 °C)
a
16 V
72 mA
242 mW
1 mH
153 nF
Endress+Hauser