Samson 3767, Translation Of Original Instructions

Page: 18 / 112

3-4 EB 8355-2 EN
Design and principle of operation
3.1 Technical data
Positioner
Travel range, adjustable
Direct attachment: 7.5 to 30 mm
Attachment according to IEC 60534-6: 7.5 to 120 mm or
Opening angle 30° to 90° depending on the cam disk
Set point
Signal range 0/4 to 20 mA 1 to 5 mA
Span 8 to 20 mA 2 to 4 mA
Coil resistance R
i
at 20 °C 200 Ω 880 Ω
Supply Supply air 1.4 to 6 bar (20 to 90 psi)
Air quality acc.
to ISO 8573-1
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 p
st
(output) Can be limited between approx. 2.5 to 6.0 bar (38 to 90 psi)
Characteristic Linear characteristic, deviation from terminal-based conformity ≤1 %
Hysteresis ≤0.6 %
Sensitivity ≤0.1 %
Direction of action Reversible
Proportional band Xp <1 to 2.5 % (proportional-action coefficient K
p
: >100 to 40)
Air consumption At 1.4 bar supply pressure:
≤280 l
n
/h
At 6 bar supply pressure: ≤280 l
n
/h
With lowest setting of pressure regulator
Air output
capacity
Actuator (supply) 3.0 m
n
³/h · K
Vmax (20 °C)
= 0.09 8.5 m
n
³/h · K
Vmax (20 °C)
= 0.09
Actuator (exhaust) 4.5 m
n
³/h · K
Vmax (20 °C)
= 0.15 14.0 m
n
³/h · K
Vmax (20 °C)
= 0.15
Permissible ambient temperature –20 to 80 °C with plastic cable gland
–40 to 80 °C with metal cable gland (special version down to –45 °C)
–20 to 70 °C with position transmitter
See test certificates in the appendix for explosion-protected devices
Influences Temperature: ≤0.3 %/10 K
Supply air: ≤1 % between 1.4 and 6 bar
Vibration: None between 10 and 150 Hz and 4 g
Explosion protection See test certificate in the appendix for type of protection Ex ia IIC T6
Degree of protection IP 54/IP 65 and NEMA 4X possible by fitting a filter check valve (see table on
accessories on page )
Electromagnetic compatibility Complying with EN 61000-6-2, EN 61000-6-3 and NAMUR Recommendation
NE 21
Conformity
·
Weight Approx. 1 kg