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5. Technical data
5.1 General
Measured quantity:
Angle of rotation
Measuring principle:
Capacitive method
5.2 Measuring input
Angle measuring range: Programmable between
0 ... 360°
Drive shaft:
Ø 10 mm [0.394"]
Ø 19 mm [0.748"] with fl ange
adapter
Starting torque:
max. 0.03 Nm [4.248 in-oz]
max. 0.04 Nm [5.664 in-oz] with
fl ange adapter
Sense of rotation:
Adjustable
5.3 Measuring output
Power supply:
Standard NEx:
nominal voltage 24 VDC
Explosion protection intrinsic ia:
input voltage U
max. input current I
max. input power P
max. internal
capacitance C
max. internal
inductance L
Explosion prevention (Protection
by enclosure) tb:
nominal voltage 24 VDC
Output variable I
:
Load-independent DC current,
A
proportional to the input angle
Standard range:
4 ... 20 mA, 2-wire
protected against wrong polarity
Response time:
< 3.5 ms
External resistance:
R
ext max.
(load)
H = Power supply
I
= Output signal end value
A
5.4 Accuracy data
Absolute precision:
± 0.5 % at 360°
Resolution:
± 0.1°
Reproducibility:
< 0.1°
Infl uence of temperature
output current
(–40 ... +85°C):
40 ppm / K
[–40 ... +185°F]
5.5 Installation data
Material:
Front: aluminium
Back: aluminium anodized
Shaft: rust-proof, hardened steel
Mounting position:
Any
Connections:
3-pin spring-type terminal block or
sensor plug connector metal
(M12 x 1, 4 poles / only for NEx
version
+30%
-50%
:
12 ... 30VDC
i
: 160mA
i
: 1W
i
:
22nF
i
:
7.3 μH
i
+30%
-50%
H [V]-12V
[kΩ] =
I
[mA]
A
Weight:
appr. 360g [12.7 oz]
Admissible static
WT720
loading of shaft:
Standard
80 N (radial)
40 N (axial)
5.6 Regulations
Spurious radiation:
EN 61000-6-3
Immunity:
EN 61000-6-2
Degree of pollution:
2
Admissible
common-mode voltage: 100 V AC, CATII
Test voltage:
750 V DC, 1 min.
All connections against housing
Housing protection:
IP 67 acc. to EN 60529
IP 69k acc. to EN 40050-9
5.7 Environmental conditions
Climatic rating:
Standard
Temperature –20 ... +85 °C
[–40 ... +185°F]
Rel. humidity ≤ 95 % non-condensing
Explosion protection
Temperature –40 ... +70 °C
[–40 ... +158°F]
Rel. humidity ≤ 95% non-condensing
Transportation and
storage temperature:
–40 ... +85 °C [–40° ... +185°F]
Altitude:
max. 2000 m
Vibration resistance:
EN 60068-2-6
≤ 100 m/s
Shock resistance:
EN 60068-2-27
1000 m/s
5.8 Operation in potentially explosive environments:
Gas explosion
prevention:
Labeling:
Conform to
standard:
Type of
protection:
Temperature class:
Group according to
EN60079-0:2012:
Dust explosion
prevention:
Labeling:
Conform to
standard:
WT720
with fl ange
120 N (radial
40 N (axial)
2
/ 10 ... 500 Hz
2
/ 11 ms
Ex ia IIC T4 Gb
ATEX:
EN 60079-0:2012
EN 60079-11:2012
IECEx:
IEC 60079-0:2011
IEC 60079-11:2011-06
ia
T4
II
Ex ia IIIC T80°C Db
or
Ex tb IIIC T80°C Db
ATEX:
EN 60079-0:2012
EN 60079-11:2012
EN 60079-31:2009
IECEx:
IEC 60079-0:2011
IEC 60079-11:2011-06
IEC 60079-31:2008
13
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