4
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User Instructions Logix 520si - LGENIM2520-00 09/09
4 SPECiFiCATiOnS
Table 1: input Signal
Input Signal Range
4 - 20 mA (HART)
Compliance Voltage
12 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
< 0,1%
Repeatability
< 0,2%
Deadband
< 0,2%
Table 9: Limit Switches (optional)
Type
P&F SJ2-S1n
Load current
< 1 mA < 3 mA
Voltage range
5 - 25 VDC
Hysteresis
0,2 %
Temperature
-25 °C to 100 °C (-13 °F to 212 °F)
Type
P&F SJ2-Sn
Load current
< 1 mA < 3 mA
Voltage range
5 - 25 VDC
Hysteresis
0,2 %
Temperature
-40 °C to 100 °C (-40 °F to 212 °F)
Type
P&F SJ2-n
Load current
< 1 mA < 3 mA
Voltage range
5 - 25 VDC
Hysteresis
0,2 %
Temperature
-25 °C to 100 °C (-13 °F to 212 °F)
3 LOgix 520Si OVERViEW
The Logix 520si is a two-wire, 4-20 mA input digital
valve positioner. The Logix 520 also utilizes the HART
protocol to allow two-way remote communication with
the positioner. The Logix 520si positioner controls single-
acting actuators with linear and rotary mountings. The
Logix 520si is completely powered by the 4-20 mA input
signal. The minimum input signal required to function is
3,6 mA. As the positioner is insensitive to supply pres-
sure 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 pressure
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.
Optional limit switch unit and a directly attachable double
acting module complete the Logix 520si positioner acces-
sories.
Table 8: Hazardous Area Specifications
ATEX
II1G Ex ia IIC T4 - T6
II3G Ex ic IIC T4 - T6
FM
Class I, Division 2, Groups A,B,C,D Temp. Class. T4 Ta = 85°C
Class I Zone = Group IIC T4 Ta = 85°C
Class I, Division 2, Groups A,B,C,D Temp. Class. T4 Ta = 85°C
CSA
Class I Division 1, Groups A,B,C,D
Class I Division 2, Groups A,B,C,D
