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Introduction 1 2 4 3 1 Actuator 2 Positioner, single-acting in explosion proof metal housing 3 Lantern 4 Manometer block, single-acting Figure 1-3 Explosion proof positioner mounted on linear actuator (single-acting) 1 3 2 1 Positioner double-acting in explosion proof metal housing 2 Rotary actuator 3 Manometer block, double-acting Figure 1-4 Explosion proof positioner mounted on rotary actuator (double-acting) 14 SIPART PS2 Manual A5E00074631-03
Design and Functional Principle Design and Method of Operation 2 The following chapter describes the mechanical and electrical design, the instrument components and method of operation of the positioner. 2.1 Overview Introduction The electropneumatic positioner forms a control system in connection with an actuator. The current position of the actuator is detected by a servo potentiometer and fed back as actual value x. The setpoint and actual value are output simultaneously on the display. The setpoint w is formed by a current fed to the positioner which at the same time serves to supply the positioner in two-wire operation. In 3 / 4-wire operation the supply comes from a 24 V voltage input. The positioner operates as a predictive five--point switch by the output variable ±∆y of which the integrated actuating valves are controlled with pulse length modulation. These actuating signals cause fluctuations in pressure in the actuator chamber(s) and thus adjustment of the actuator until the control error is zero. Operation (manual) and configuration (structuring, initialization and parameterization) is effected by three keys and a display with the housing cover removed. The standard controller has one digital input (DI1). This can be configured individually and can be used for blocking the operating modes for example. With the J y -option module, the current actuator position can be output as a two wire signal J y =4to20mA. In addition the actuator can be monitored for two programmable limit values which respond on exceeding or dropping below the stroke or angle of rotation. The limit value alarms are output by the alarm option module which can monitor and report the function of the positioner and the actuator additionally through a fault message output. The value of the control difference dependent on the travel time is monitored in automatic mode. The fault signal is always set when the control error cannot be leveled after a certain time because for example the valve is blocked or the mains pressure is insufficient. The three digital outputs are implemented as semiconductor outputs and are error self--reporting, i.e. the out- SIPART PS2 Manual A5E00074631-03 15
Page 1: Manual Edition 07/2003 sipart ps2 E
Page 4 and 5: Copyright e Siemens AG 2000 All rig
Page 6 and 7: 3.4.2 Connection in intrinsically s
Page 8 and 9: Information for the Operator This m
Page 10 and 11: Information for the Operator ! WARN
Page 12 and 13: Information for the Operator The fo
Page 14 and 15: Introduction Degree of protection E
Page 18 and 19: Design and Functional Principle put
Page 20 and 21: Design and Functional Principle 2.2
Page 22 and 23: Design and Functional Principle Pos
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Page 28 and 29: Design and Functional Principle 5.
Page 30 and 31: Design and Functional Principle 6 1
Page 34 and 35: Design and Functional Principle The
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Page 38 and 39: Preparing for Operation 90 14 3x G1
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Page 44 and 45: Preparing for Operation 3.3.3 Mount
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Page 64 and 65: Preparing for Operation SIA module
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Preparing for Operation Only a few
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Preparing for Operation 3. Switch o
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Preparing for Operation 4. Switch o
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Preparing for Operation The first l
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Preparing for Operation The initial
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Preparing for Operation 3.6.7 Autom
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Preparing for Operation 2 set lever
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Preparing for Operation 3.7 Copying
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Operation Figure 4-1 Meaning of the
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Operation 4.3 Operating modes The p
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Operation Manual 4-1 mode In this o
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Operation The following configurati
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Operation . NOTE After ”LWAY, ncS
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Operation y=x 100 % Positioner 1 6.
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Operation The setpoint vertex value
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Operation 40.YCDO 41.YCUP Value for
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Operation 48. TIM 49. LIM 50. STRK
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Operation 4.5 Diagnosis 4.5.1 Diagn
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Operation 4 A1CNT 5 A2CNT Alarm cou
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Operation 31 VENT1 32 VENT2 Number
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Operation Error Event code 1 Remain
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Operation 8 Monitoring of the dead
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Operation Upper line Lower line Mea
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Operation 4.7 Optimization of the c
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Care and Maintenance 8. Replace the
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Technical Data ■ Technical data S
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Technical Data ■ Technical data (
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Technical Data ■ Technical data (
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Scope of delivery 7.1 Ordering data
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Scope of delivery 7.4 Scope of deli
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Index Installation positions, favor
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Appendix 9.2 Certificates 9.2.1 EC
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Appendix 9.2.3 EC Type-Examination
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Appendix 130 SIPART PS2 Manual A5E0
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Appendix 9.2.6 FM Approval Report (
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Appendix 9.2.7 FM Approval Report 1
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Appendix 9.2.8 CSA Certificate of C
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Appendix 9.2.9 Control Drawing A5E0
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