Samson 3787 Mounting And Operating Instructions page 6

Technical data
Positioner
Travel
Direct attachment to Type 3277
Attachment acc. to IEC 60534-6
Bus connection
Permissible operating voltage
Max. operating current
Additional current in case of fault
Supply air
Signal pressure (output)
Characteristic, adjustable
Deviation
Dead band
(based on rated travel/angle
Resolution (internal measurement)
Transit time
Operating direction
Air consumption
Air supply
Permissible ambient temperature
Effects
Degree of protection
Electromagnetic compatibility
Binary input
Forced venting
(activated over an internal switch)
6
EB 8383-1 EN
Adjustable
7.5 to 30 mm
7.5 to 120 mm or 30 to 120° for rotary actuators
Fieldbus interface as per EN 61158-2, bus-powered
Physical Layer Class: 113 (not explosion-protected version) and 111 (Ex-version)
Field device according to FM 3610 entity and FISCO.
1)
9 to 32 V DC , power supply over bus
13 mA
0 mA
Supply air from 1.4 to 6 bar (20 to 90 psi);
Air quality as per ISO 8573-1: Max. particle size and density: Class 4;
Oil contents: Class 3; Pressure dew point: Class 3
0 bar up to the pressure of the supply air
Globe valve: linear, equal percentage, reverse equal percentage,
SAMSON butterfly valve: linear, equal percentage
VETEC plug rotary valve: linear, equal percentage
≤1 %
Adjustable from 0.1 to 10.0 % , default 0.5 %
< 0.05 %
For valve transit time up to 240 s, set point ramp for venting and supply air
separately adjustable
Reversible, setting by software
Independent of supply air <90l
Actuator filled: when ∆p = 6 bar 9.3 m
Actuator vented: when ∆p = 6 bar 15.5 m
–40 to 80 °C
The specifications in the EC type examination certificate additionally apply for
explosion-protected devices
Temperature: ≤0.15 %/10 K, supply air: none,
Vibrations: none up to 250 Hz and 4 g
IP 65 using filter check valve included
Requirements acc. to EN 61000-6-2, EN 61000-6-3 and
NAMUR Recommendations NE 21 are met
Internal power supply 5 V DC, R
Input 6 to 24 V DC, R approx. 6 kΩ at 24 V DC (depending on voltage)
i
Switching point for "1" signal ≥ 3 V, switching point for "0" signal only at 0 V,
K 0.17
V
/h
n
3
when ∆p = 1.4 bar 3.5 m
/h,
n
3
/h, when ∆p = 1.4 bar 5.8 m
n
= 100 kΩ for alarm function
i
3
/h
n
3
/h
n