Flowserve 505si Series Digital Positioner - Manual (Page 4)

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User Instructions Logix 505si - LGENIM0505-00 03/09
3 LOgix 505si OVERViEW
The Logix 505si is a two-wire, 4-20 mA input digital
valve positioner. The Logix 505si positioner controls
single-acting actuators with linear and rotary mount-
ings. The Logix 505si is completely powered by the 4-20
mA input signal. The minimum input signal required to
function is 3,6 mA.
Since the positioner is insensitive to supply pressure
changes and can handle supply pressures from 1,5 to
6 barg (22 to 87 psig), a supply regulator is usually not
required; however, in applications where the supply
pressure is higher than the maximum actuator pres-
sure rating a supply regulator is required to lower the
pressure to the actuator’s maximum rating (not to be
confused with operating range). A coalescing air filter
is recommended for all applications due to the close
tolerances in the positioner.
nOTE: The air supply must conform to ISA 7.0.01or
IEC 770 (a dew point at least 10 ˚C / 18 ˚F below ambi-
ent temperature, particle size below five microns – one
micron recommended – and oil content not to exceed
one part per million).
4 SPECiFiCATiOnS
Table 1: input Signal
Input Signal Range 4 - 20 mA
Compliance Voltage 6 VDC
Voltage Supply (maximum) 30 VDC
Minimum Required Operating
Current
3,6 mA
Table 2: Stroke Output
Feedback Shaft Rotation Min. 15°, max 90°
40° recommended for linear
applications
Table 3: Air Supply
Air Supply Quality Free from moisture, oil and dust
per IEC 770 and ISA-7.0.01
Input Pressure Range 1,5 to 6,0 bar (22 to 87 psi)
Air Consumption (steady state) 0,08 Nm³/h @ 1,5 bar
(0,047 SCFM @ 22 psi)
0,12 Nm³/h @ 6,0 bar
(0,071 SCFM @ 87 psi)
Table 4: Output Signal
Output Pressure Range 0 to 100% of air supply pressure
Output Flow Capacity 2,4 Nm³/h @ 1,5 bar
(1,41 SCFM @ 22 psi)
7,0 Nm³/h @ 6,0 bar
(4,12 SCFM @ 87 psi)
Table 5: Shipping Weights
Base Positioner without
Accessories
1,2 kg (2,65 lbs)
Table 7: Environmental Conditions
Operating Temperature
Standard
-20 °C to +80 °C
(-4 °F to +178 °F)
Operating Temperature
Low
-40 °C to +80 °C
(-40 °F to +178 °F)
Transport and Storage
Temperature
-40 °C to +80 °C
(-40 °F to +178 °F)
Operating Humidity 0 to 100% non-condensing
Table 6: Performance Characteristics (typical)
Linearity < +/- 1,0%
Resolution < 0,3%
Repeatability < 0,5%
Deadband < 0,5%
Table 8: Hazardous Area Specifications
ATEX II 1G Ex ia II C T6
ATEX II 3G Ex nL nA II C T4