3.1 Technical data
10 EB 8394 EN
Technical data
Type 3725 Positioner
Travel, adjustable Direct attachment to Type 3277 Actuator: 3.75 to 30 mm
Attachment acc. to IEC 60 534-6-1 (NAMUR): 3.75 to 50 mm
Attachment to Type 3372 Actuator: 15/30 mm
Attachment to rotary actuators: 24 to 100°
Reference
variable w
Signal range 4 to 20 mA · Two-wire device with reverse polarity protection
Split range
operation
4 to 11.9 mA and 12.1 to 20 mA
Static destruction
limit
±
33 V
Minimum current 3.8 mA
Load impedance
£
6 V (corresponds to 300
W
at 20 mA)
Supply air
Supply pressure 1.4 to 7 bar (20 to 105 psi)
Air quality
acc. to
ISO 8573-1 (2001)
Max. particle size and density: Class 4 · Oil content: Class 3
Pressure dew point: Class 3 or at least 10 K below the lowest ambient temperature
to be expected
Signal pressure (output)
0 bar up to the capacity of the supply pressure · Can be limited to approx. 2.4
bar by software
Characteristics 3 characteristics for globe valves · 9 characteristics for rotary valves
Hysteresis
£
0.3 %
Sensitivity
£
0.1 %
Transit time < 0.5 s not permissible for initialization, adaptation using volume restriction
Direction of action w/x reversible
Air consumption
£
100 l
n
/h with a supply pressure up to 6 bar and a signal pressure of 0.6 bar
Air output
capacity
Actuator pressurized At
D
p = 6 bar: 8.5 m
n
³/h
·
At
D
p = 1.4 bar: 3.0 m
n
³/h
·
K
Vmax (20 °C)
= 0.09
Actuator vented At
D
p = 6 bar: 14.0 m
n
³/h · At
D
p = 1.4 bar: 4.5 m
n
³/h · K
Vmax (20 °C)
= 0.15
Permissible ambient temperature
–25 to +80 °C
Limits in test certificates additionally apply for explosion-protected devices.
Influences
Temperature
£
0.15 %/10 K
Supply air None
Vibrations
£
0.25 % up to 2000 Hz and 4 g according to IEC 770
Electromagnetic compatibility
Complying with the requirements of EN 61000-6-2, EN 61000-6-3, EN 61326-1
and NAMUR Recommendation NE 21
Electrical connections
One M20x1.5 cable gland for 6 to 12 mm clamping range
Cage clamp terminals for 0.2 to 1.5 mm² wire cross-sections
Explosion protection II 2 G Ex ia IIC T4
Degree of protection IP 66
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