IM-P343-37 CTLS Issue 4
6
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TRANSLATION RUN OVER
SP400 Electropneumatic Smart Positioner
3.1 Description
The SP400 smart valve positioner is loop powered from a 4 - 20 mA input signal to provide
accurate adaptive positional control of pneumatic actuated linear and quarter turn valves.
Precise control is maintained through valve position feedback that automatically varies the pneumatic output
pressure to overcome the effects of stem friction and flow forces to maintain desired valve position. Indication
of valve position is provided through a continuous digital display of % travel. Valve position feedback is
retrieved by means of a non contact technology based on Hall effect. The pneumatics are based on piezovalve
technology - Therefore, high resolution, high reliability, vibration insensitivity and extremely low air
consumption is guaranteed at steady state.
The SP400 includes many smart functions that can be fully programmed through menu driven software using
an integral keypad and LCD alphanumeric data. The absence of mechanical linkages between valve stem
and positioner, drastically simplifies the mounting procedure and reduces the time required. Moreover the
software has been designed to simplify operations as much as possible: commissioning requires just
assembling the SP400 to the valve and pressing one button. The SP400 is supplied with a NAMUR standard
mounting kit for attachment to yoke or pillar mounted actuators. For quarter turn valves, a mounting kit
compliant to VDI / VDE 3845 is supplied.
Fig. 1
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4
11
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9
3
21
13 5 6 7 8
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19 20 21 22 18
Fig. 2
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14 17
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3. Technical information
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