Samson 3725-000 - Page 3

T 8394 EN 3
Table1: Technical data
Type3725Positioner
Travel (adjustable) Direct attachment to Type 3277 Actuator: 3.75 to 30 mm
Direct attachment to Type 2780-2 Actuator: 6/12/15 mm
Attachment to Type 3372 Actuator: 15/30 mm
Attachment according to IEC 60534-6 (NAMUR): 3.75 to 50 mm
Attachment to rotary actuators: 24 to 100°
Reference variable w
(reverse polarity protection)
Static destruction limit
4 to 20mA signal range · Two-wire device · Split-range operation 4 to 11.9 mA and 12.1 to 20 mA
±33 V
Minimum current 3.8 mA
Load impedance Max. 6.3V
Supply air
Air quality acc. to ISO8573-1
Supply air: 1.4 to 7bar (20 to 105psi)
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. 2.3bar by software
Characteristic 3 characteristics for globe valves · 9 characteristics for rotary valves
Hysteresis ≤ 0.3 %
Sensitivity ≤ 0.1 %
Transit time Only for actuators with initialization time > 0.5 s
1)
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 lled with air At Δp = 6 bar: 8.5m
n
3
/h, At Δp = 1.4 bar: 3.0m
n
3
/h K
Vmax
(20 °C) = 0.09
Actuator vented At Δp = 6 bar: 14.0m
n
3
/h, At Δp = 1.4 bar: 4.5m
n
3
/h K
Vmax
(20 °C) = 0.15
Permissible ambient temperature –20 to +80 °C
–25 to +80 °C with metal cable gland
The limits in the test certicates additionally apply for explosion-protected versions
Safety
Inuences Temperature: ≤ 0.15 %/10 K
Inuence of vibrations: ≤ 0.25 % up to 2000 Hz and 4 g according to IEC 770
Supply air: None
Electromagnetic compatibility Complying with EN 61000-6-2, EN 61000-6-3 and NAMUR Recommendation NE 21
Explosion protection
II 2G Ex ia IIC T4 according to ATEX
Intrinsically safe, Ex ia IIC T4 according to CSA Group
1Ex ia IIC T4 Gb X according to GOST
Degree of protection IP 66
Materials
Housing Polyphthalamide (PPA)
Cover Polycarbonate (PC)
External parts Stainless steel 1.4571 and 1.4301
Cable gland M20 x 1.5, black polyamide (PA)
Venting High-density polyethylene (PE-HD)
Weight Approx. 0.5 kg
1)
For faster actuators, a volume restriction must be used. Otherwise, the initialization cannot be performed successfully.
Table2: Explosion protection certicates
Type of approval Certicatenumber Date Comments
EC Type Examination Certicate PTB 11 ATEX 2020 X 2011-08-25 II 2G Ex ia IIC T4
GOST certication RU C-DE.GB08.B.00697 2014-12-15 1Ex ia IIC T4 Gb X
CSA certication 2703735 2014-06-03 Ex ia IIC T4