Cashco PS2 I-P User Manual

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SIMATICr,SIPARTr,SIRECr, SITRANSr are registered trademarks of Siemens AG. All other product or system names are (registered) trademarks of their respective owners and must be treated accordingly.
The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights created by the granting of patents or registration of a design are reserved.
Technical data subject to change without notice
Contents
0 Information for the Operator 5.............................................
0.1 General information 5...........................................
0.2 Meaning of safety instructions and warnings 6.....................
0.3 Qualified Personnel 7...........................................
0.4 Use as intended 8..............................................
0.5 Technical Documentation 8......................................
0.6 Warranty Information 9..........................................
0.7 Delivery Notes 9...............................................
0.8 Standards and Regulations 10....................................
1 Introduction 11............................................................
1.1 General information about the positioner 1 1.........................
2 Design and Method of Operation 15........................................
2.1 Overview 15....................................................
2.2 Instrument Components 16.......................................
2.2.1 Motherboard 17.................................................
2.2.2 Electrical Connections 17.........................................
2.2.3 Pneumatic Connections 18.......................................
2.2.4 Mounting Kit 21.................................................
2.2.5 Purge air switching (not in the explosion proof version) 21............
2.2.6 Restrictors 21...................................................
2.3 Method of Operation 22..........................................
2.4 State as supplied 25.............................................
2.5 Options modules 25.............................................
2.5.1 Options modules in normal and intrinsically safe versions 25..........
2.5.2 Options modules in explosion proof version 28......................
2.5.3 HART-function 29...............................................
2.5.4 Alarm module 30................................................
2.5.5 Jy-module 31...................................................
2.5.6 SIA module 31..................................................
2.5.7 Accessories 32.................................................
3 Preparing for Operation 33.................................................
3.1 Instrument identification (type key) 33..............................
3.2 Dimensional drawings 33.........................................
3.3 Assembly 35....................................................
3.3.1 Instructions for using positioners in a wet environment 36.............
3.3.2 Instructions for using positioners which are exposed to great accelerations
or vibrations 38.................................................
3.3.3 Mounting kit ”linear actuator” 6DR4004-8V and 6DR4004-8L 39.......
3.3.4 Assembly procedure (see figure 3-6, page 41) 39....................
SIPART PS2 Manual A5E00074631-- 01
3
3.3.5 Mounting kit ”Rotary actuator” 6DR4004-8D 42......................
3.3.6 Assembly procedure (see figure 3-7 and figure 3-8) 43...............
3.4 Electrical Connection 48..........................................
3.4.1 Connection variants 49...........................................
3.4.1.1 Connection variant: not intrinsically safe 49.........................
3.4.1.2 Connection variant: intrinsically safe 50............................
3.4.1.3 Connection variant: Options in positioner in non--intrinsically safe
and explosion proof version 52....................................
3.4.1.4 Connection variant: Options in the positioner in intrinsically safe
version 54......................................................
3.5 Pneumatic Connection 56........................................
3.6 Commissioning 57...............................................
3.6.1 Preparations for linear actuators 58................................
3.6.2 Automatic initialization of linear actuator 59.........................
3.6.3 Manual initialization of linear actuator 61............................
3.6.4 Preparations for rotary actuator 64.................................
3.6.5 Automatic initialization of rotary actuator 64.........................
3.6.6 Manual initialization of rotary actuators 66..........................
3.6.7 Automatic initialization (structograms) 67...........................
3.7 Copying initialization data (positioner exchange) 72..................
4 Operation 73.............................................................
4.1 Display 73......................................................
4.2 Input keys 73...................................................
4.3 Operating modes 76.............................................
4.4 Parameters 78..................................................
4.5 Diagnosis 90...................................................
4.5.1 Diagnostic display 90............................................
4.5.2 Meaning of the diagnostic values 91...............................
4.5.3 Online-Diagnosis 93.............................................
5 Service and Maintenance 99................................................
6 Technical Data 101.........................................................
7 Scope of Delivery 105.......................................................
7.1 Scope of delivery of standard controller 105..........................
7.2 Scope of delivery of options 106....................................
7.3 Scope of delivery of accessories 106................................
A Appendix 107..............................................................
A1 Index 107..........................................................
A2 Literature and Catalog 109...........................................
A3 Conformity 109.....................................................
SIPART PS2 Manual
4
A5E00074631-- 01
Information for the Operator

Information for the Operator

Dear customer,
Please read this manual before starting work!
It contains important information and data which, when observed, ensure full availability of the equipment and save service costs. This simplifies handling of this control instrument considerably and provides accurate measuring results.
You have purchased an instrument which can be installed in various configurations:
- SIPART PS2 without Ex-protection in a metal-- or plastic housing.
- SIPART PS2 with EEx ia/ib-protection in a metal-- or plastic
housing.
- SIPART PS2 EEx d in a pressurized explosion proof metal housing
This manual takes each of these possibilities into consideration. Any differences between the devices are indicated specially.
Scope of delivery, see chapter 7, page 105.
0

0.1 General information

The product described in this manual left the factory in a perfectly safe and tested condition. To maintain this condition and to achieve perfect and reliable operation of this product, it must only be used in the way described by the manufacturer. Successful and safe operation of this equipment is dependent on proper handling, installation, operation and maintenance.
This manual contains the information required for use as intended of the product it describes. It is addressed to technically qualified personnel specially trained or having relevant knowledge of instrumen­tation and control technology, hereafter called automation technology.
Familiarity with and proper technical observance of the safety notes and warnings contained in this manual are essential for safe installation and commissioning and for safety in operation and maintenance of the product described. Only qualified personnel as defined in Chapter 0.3 has the necessary specialist knowledge to interpret the general safety notes and warnings given in this document in specific cases and to take the necessary action.
The documentation supplied with the instrument is listed in Chapter
0.5.
SIPART PS2 Manual A5E00074631-01
5
Information for the Operator
This manual is not a permanent part of the scope of supply. For reasons of clarity, it does not contain every detail about every version of the product described and cannot take every eventuality in installa­tion, operation, maintenance and use in systems into account. If you require further information or if problems occur that have not been dealt with in sufficient detail in this document, please request the required information from your local Siemens office or the office responsible for you.
Functionality, commissioning and operation are described in this manual.
Please pay special attention to the Warning and Note texts. These are separated from the remaining text by horizontal lines and specially marked with symbols (see Chapter 0.2).

0.2 Meaning of safety instructions and warnings

Safety information and warnings are intended to avert danger from the life and health of users and maintenance personnel and to prevent material damage. They are highlighted in this manual by the headings defined here. They are also marked by warning symbols next to where they appear. The headings used have the following meaning for the purposes of this manual and the product labels:
DANGER
!
!
!
indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
used with the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
CAUTION
used with the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
SIPART PS2 Manual
6
A5E00074631-01
Information for the Operator
NOTICE
NOTICE used without the safety alert symbol indicates a potential situation which, if not avoided, may result in an undesireable result or state.
.
NOTE
indicates a reference to a possible advantage when this recommendation is followed.

0.3 Qualified Personnel

The result of unqualified intervention in the instrument or nonobservance of the warnings given in this manual or on product labels can be severe personal injury and/or serious material damage. Therefore only properly qualified personnel must make changes and settings in the instrument.
For the purpose of the safety information in this manual and on the product labels, qualified personnel are those who
S if they are configuration personnel, are familiar with the safety
concepts of automation technology
S if they are operating personnel, have been instructed in the handling
of automation equipment and know the content of this manual relating to operation
S if they are commissioning and/or service personnel, are trained to
repair such automation equipment and authorized to energize, de-energize, clear ground and tag circuits and equipment according to safety engineering standards.
SIPART PS2 Manual A5E00074631-01
S and instructed additionally in first aid
S and, in the case of ex-proof equipment, are trained, instructed or
authorized to perform work on electrical circuits of equipment subject to explosion hazard.
7
Information for the Operator
WARNING
!
The instrument must only be installed and commissioned by qualified personnel.
The instrument is designed for connection to functional and safety extra low voltage.
Electrical safety depends only on the power supply equipment.
Pneumatic actuators exert considerable positioning forces. The safety precautions of the actuator used must therefore be scrupulously observed during installation and commissioning in order to prevent injuries.
We explicitly draw your attention to the necessity of observing safety regulations regarding operation in zones subject to explosion hazard, if applicable.

0.4 Use as intended

Use as intended for the purpose of this manual means that this product must only be used for the applications described in the technical description (see also Chapter 3 of this manual).
The product described in this manual has been developed, manufac­tured, tested and documented observing the relevant safety standards. If the handling rules and safety information for configuration, installa­tion, use as intended and maintenance are observed, there is normally no danger with regard to material damage or for the health of personnel. Extra low voltages that are connected must be fed in by safe isolation.

0.5 Technical Documentation

In addition to this manual, the following documentation is also supplied with the instrument:
- Leaflet “Operation -- Concise Overview”
explains in visualized form the principle of operation and parameterization and automatic commissioning.
- “Operating Instructions”
contains the information required for assembly, connection and commissioning.
SIPART PS2 Manual
8
A5E00074631-01
Information for the Operator
The following list contains all the documents available for these instruments:
Title Language Order No.
Operating Instructions
German/English French/Italian/Spanish
A5E00074600 A5E00074601
Manual German
Leaflet German

0.6 Warranty Information

We should like to point out that the content of this manual is not part of and does not modify a previous or current agreement, undertaking or legal relationship. Siemens is bound solely by the contract of sale, which also contains the complete and exclusive warranty. The contractual warranty conditions are neither extended nor restricted by this document.

0.7 Delivery Notes

English
English French Italien Spanish
A5E00074630 A5E00074631
A5E00074610 A5E00074611 A5E00074612 A5E00074613 A5E00074614
The scope of delivery is listed on the dispatch papers accompanying the delivery in accordance with the valid contract of sale.
When you open the packaging please observe the information on the packaging. Check that the delivery is complete and undamaged. If possible, compare the order number on the rating plates with the ordering data.
For the scope of delivery please see Chapter 7.
SIPART PS2 Manual A5E00074631-01
9
Information for the Operator

0.8 Standards and Regulations

As far as possible, the harmonized European standards were used to specify and manufacture this equipment. If harmonized European standards have not been applied, the standards and regulations of the Federal Republic of Germany apply (see also the Technical Data in Chapter 6, page 101).
If this product is used outside the area of applicability of these standards and regulations, please observe the standards and regulations in force in the country where the product is operated.
10
SIPART PS2 Manual
A5E00074631-01
Introduction

Introduction

1.1 General information about the positioner

The positioner is used to adjust and control pneumatic actuators. The controller operates electropneumatically with compressed air as an energy supply.
Purpose
For example, the positioner can be used to control valves as follows:
- with linear actuator (figure 1-1, page 13) or
- with rotary actuator VDI/VDE 3845 (figure 1-2, page 13)
Different mounting types are available for linear actuators:
- NAMUR or IEC 534
- integrated mounting to ARCA
1
Versions
Housing
- integrated mounting to SAMSON (non--explosion--proof version)
This means the positioner can be installed and operated on all common actuator systems.
The positioner is available for the following actuators:
- double--acting and
- single--acting
For following applications:
- potentially explosive or
- not potentially explosive applications.
The electronics with display, position feedback and valve block are integrated in the housing.
The housing is available in three versions:
- Plastic housing for single and double--acting actuators
- Metal housing for single--acting actuators
- Explosion proof metal housing for single and double--acting
actuators
SIPART PS2 Manual A5E00074631-01
11
Introduction
Degree of protection
Explosion Protection
Options
Accessories
The device is designed with IP65/NEMA4x degree of protection.
The intrinsically safe version can be used in hazardous areas in zone 1 or zone 2. The explosion proof version can be used in hazardous areas in zone 1 or zone 2.
The positioner can be expanded with various options modules (chapter
2.5, page 25). The following modules are available in all:
-module: Two--wire current output 4 to 20 mA for position feed-
- J
y
back
- Alarm module: 3 digital outputs and 1 digital input
- SIA module: one digital output for fault messages, two digital out-
puts for limit value alarms
- Manometer block: 2 or 3 manometers for single and double action positioners
- Add--on flange (NAMUR) for safety valve block
- Add--on sets for linear and rotary actuator
Environmental Protection
Only environmentally friendly materials have been used in the construction of the positioner.
The technical manual is printed on chlorine--free bleached paper.
12
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A5E00074631-01
Introduction
1
2
3
1 Actuator 2 Positioner, single action in metal housing 3 Lantern 4 Manometer block, single action 5Valve
Figure 1-1 Positioner mounted on linear actuator (single action)
4
5
1
2
1 Positioner double action in plastic housing 2 Rotary actuator 3 Manometer block, double action
Figure 1-2 Positioner mounted on rotary actuator (double action)
3
SIPART PS2 Manual A5E00074631-01
13
Introduction
1
2
4
3
1 Actuator 2 Positioner, single action in metal housing 3 Lantern 4 Manometer block, single action
Figure 1-3 Explosion proof positioner mounted on linear actuator (single action)
1
3
2
1 Positioner double action in plastic housing 2 Rotary actuator 3 Manometer block, double action
Figure 1-4 Explosion proof positioner mounted on rotary actuator (double action)
14
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A5E00074631-01
Design and Functional Principle

Design and Method of Operation

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 predicative five--point switch by the output variable ±Dy of which the integrated actuating valves are controlled with pulse length modulation.
2
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 levels for example.
With the J as a two wire signal J
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 floating 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-
-option module, the current actuator position can be output
y
=4to20mA.
y
SIPART PS2 Manual A5E00074631-01
15
Design and Functional Principle
1
puts respond even when the power supply fails or the electronics are defective.
The actuator can also be blocked or driven to its final positions depen­ding on the configuration for example by an external event via a digital input (DI2) on the alarm module.
If you require electrically independent limit value messages from the standard controller, you will have to use the SIA module with the slot initiators instead of the alarm module.
Communication with the controller is possible via the optional HART interface.

2.2 Instrument Components

314
15
90°
3/4 W2W
13
12
1 Input: Supply air 7 Silencer 2 Output: Actuating pressure Y1 8 Transmission ratio selector 3 Display 9 Adjusting wheel slip clutch 4 Output: Actuating pressure Y2 5 Operating keys 12 Dummy plug 6 Restrictor 13 Screw-- type cable gland
6.1 Restrictor Y1 14 Terminal plate on cover
6.2 Restrictor Y2
*)
in double-- acting actuators
*)
4...20 mA 0/4...20 mA
*)
O
33
O
DI1
90
33°
6.1 6.2
789101
10 Terminals options modules
15 Purging air switch
2
1
4
56
Figure 2-1 View of the positioner in normal version (cover open)
SIPART PS2 Manual
16
A5E00074631-01
Design and Functional Principle
9
1
10
3
---­++
10
1 Input: Supply air 7 Transmission ratio selector 2 Output: Actuating pressure Y1 (only possible with positioner open) 3 Display 8 Adjusting wheel slip clutch 4 Output: Actuating pressure Y2 5 Operating keys 10 Terminals options modules
6.1 Restrictor Y1 12 Safety catch
6.2 Restrictor Y2
*)
in double-- acting actuators
*)
*)
2121
6.1
138238 9
6.2
45
9 Terminals standard controller
7
8
Figure 2-2 View of the explosion proof version of the positioner

2.2.1 Motherboard

The motherboard contains all the electronic elements such as the CPU, memory, A/D converter . It also contains the display and the operating keys.
In addition, the terminal strips for connecting the options modules are also on the motherboard.

2.2.2 Electrical Connections

The terminals of the standard controller, the Jy- and alarm-option mo­dule are arranged at the left--hand front edges and offset against each other in staircase form.
A module cover protects the modules from being pulled out and pre­vents incorrect installation.
SIPART PS2 Manual A5E00074631-01
17
Design and Functional Principle

2.2.3 Pneumatic Connections

The pneumatic connections are on the right hand side of the positioner (figure 2-3 and figure 2-4).
1
2
3
4
5
1 Actuating pressure Y1 in single-- and double-- acting actuators 2 Feedback shaft 3 Supply air P 4 Actuating pressure Y2 in double--acting actuators 5 Exhaust air output E with silencer on the bottom of the instrument
z
Figure 2-3 Pneumatic connection in normal version
1
2
3
4
5
6
7
1 Restrictor Y2 *) 5 Actuating pressure Y1 2 Restrictor Y1 6 Exhaust air output E 3 Actuating pressure Y2 *) 7 Housing ventilation (2x) 4 Supply air PZ
*)
in double-- acting actuators
Figure 2-4 Pneumatic connection in explosion proof version
18
In addition, there are pneumatic connections on the back of the positio­ner for integrated installation in single--acting linear actuators.
- Actuating pressure Y1
- Exhaust air output E (not in explosion proof version)
In the ex--factory state, these connections are sealed by screws (see figure 3-1, page 33, figure 3-3, page 34 and figure 3-4, page 35).
SIPART PS2 Manual
A5E00074631-01
Design and Functional Principle
The exhaust air output E can be provided for supplying dry instrument air to the tapping chamber and spring chamber to prevent corrosion.
Figure 2-5, page 20 shows the pneumatic connection variants for the different actuator types, the positioning action and the safety position after power failure.
SIPART PS2 Manual A5E00074631-01
19
Design and Functional Principle
Positioning pressure Connection
Y1
Y1
Y2
Y1
Y1
Y2
Closed
Closed
Actuator type
Open
Open
OpenClosed
OpenClosed
Safety position after power failure
electrical pneumatic
Closed Closed
Open Open
Open
Last position
(before power
failure)
Closed
In rotary actuators the direction of rotation counterclockwise looking onto the actuating shaft of the valve is usually defined as ”Open”.
Open
Closed
Y1
up
Down Down
down
Y1
up
down
Up Up
Y2
Y1
up
down
Up
Y1
Y2
up
down
Down
Figure 2-5 Pneumatic connection positioning
Last position
(before power
failure)
up down
20
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A5E00074631-01
Design and Functional Principle

2.2.4 Mounting Kit

The positioner can be mounted on almost all actuators with the appro­priate mounting kit.

2.2.5 Purge air switching (not in the explosion proof version)

The purge air switch is accessible above the pneumatic terminal strip with the housing open (figure 2-6). In the IN position the inside of the housing is purged with very small amounts of clean, dry instrument air. In the OUT position the purge air is fed directly to the outside air.
Figure 2-6 Purge air switch on the valve block, view of the positioner onto pneumatic connection side
with cover open

2.2.6 Restrictors

In order to achieve floating times of > 0.5 s in small actuators, the air rate can be reduced with the restrictors Y1 and Y2 (figure 2-7, in explosion proof version, see figure 2-4, page 18). By turning to the right the air rate is reduced up to shutting off. To set the restrictors it is advisable to close them and then open them slowly (see initialization RUN3).
Y1 Y2
Figure 2-7 Restrictors
SIPART PS2 Manual A5E00074631-01
21
Design and Functional Principle

2.3 Method of Operation

The electropneumatic positioner SIPART PS2 forms a control circuit with the pneumatic actuator in which the actual value x is the position of the actuator bar in linear actuators or the position of the actuator shaft in rotary actuators and the command variable w is the actuating current of a controller or a manual control station of 4 to 20 mA.
The stroke or rotary movement of the actuator is transferred by the appropriate mounting accessories, the feedback shaft and a play--free switchable gearwheel to a high quality conductive plastic potentiometer and to the analog input of the microcontroller .
This may correct the angle error of the stroke tap, compares the potemtiometer voltage as actual value x with the setpoint w fed in at the terminals 3 and 7 and calculates the manipulated variable increments Δy. Depending on the size and direction of the control error (x-w) the piezo--controlled supply air or exhaust air valve is opened. The volume of the actuator integrates the positioning increments to actuating pressure y open which moves the actuator bar or actuator shaft approximately proportionally. These positioning increments change the actuating pressure until the control error becomes zero.
The pneumatic actuators are available in single and double action versions. Only one pressure chamber is aerated or deaerated in the single action version. The resulting pressure operates against a spring. In the double action version, two pressure chambers are counteractive. In this case the one volume is deaerated when the other volume is aerated. See the block diagram figure 2-9, page 24.
The control algorithm is an adaptive predicative five--point switch (see figure 2-8, page 23).
The valves are controlled with continuous contact at large control errors (fast action zone). At medium control errors the valve is controlled by pulse length modulated pulses (slow action zone).
No actuating pulses are output in the small control error zone (adaptive dead zone). The dead zone adaptation and the continuous adaptation of the minimum pulse lengths in automatic operation cause the best possible control accuracy to be achieved at the lowest switching fre­quency. The start parameters are determined during the initialization phase and stored in a non--volatile memory. These are basically the real actuating path with the mechanical limit stops, the floating times, the size of the dead zone etc.
In addition the number of fault messages, changes in direction and the number of strokes are determined and stored every hour during operation. These parameters can be read out and documented by the communication programs such as PDM and AMS. Conclusions as to the wear on the fitting can be drawn (diagnostic function) especially by comparing the old value with the currently determined values.
22
Figure 2-9, page 24 shows the block diagrams for single-- and double-­acting actuators with the linear actuator as an example.
SIPART PS2 Manual
A5E00074631-01
Design and Functional Principle
.
Figure 2-8 Method of operation five--point switch
NOTE
The exhaust air valve is always open when there is no current.
SIPART PS2 Manual A5E00074631-01
23
Design and Functional Principle
1
BE1
I
W+
I
W-
y
0
+
x
3 V
W
+U
_
W
x
0
6
BE2
7
+5 V
A
A
2
+24 V
D
D
HART
_
Micro-
controller
A1 A2
II
A1 A2
3
_
y
y
+
+
U
U
I
5
4
Supply ai r
Zuluft
p
Z
Exhaust a i r
Abluft
p
1
p
p
p
2
Abluft
Exhaust
air
1
2
stroke
9
p
2
p
1
stroke
8
p
1
1 Motherboard with microcontroller and input circuit 2 Control panel with LC-display and momentary action switch 3 Piezo-- valve unit, always built--in 4 Valve unit with double action positioner always built--in 5 Iy-module for positioner SIPART PS2 6 Alarm module for three alarm outputs and one digital input 7 SIA-module (Slot Initiator-Alarm-module) 8 Spring--loaded pneumatic actuator (single action) 9 Spring--loaded pneumatic actuator (double action)
Figure 2-9 Block diagram of the electro--pneumatic positioner, functional diagram
.
NOTE
Alarm module (6) and SIA module (7) can only be used alternatively.
24
SIPART PS2 Manual
A5E00074631-01
Design and Functional Principle

2.4 State as supplied

There are no mechanical mounting accessories on the controller in the state as supplied These must be ordered and installed according to the “operating instructions” depending on the application.
The respective connections for single or double action versions are pre­pared at the factory as ordered.
The pneumatic connections on the rear are sealed.

2.5 Options modules

2.5.1 Options modules in normal and intrinsically safe versions

The options modules are protected and mechanically fixed by a module cover ((1), see figure 2-10, page 27 and figure 2-11, page 29).
.
Opening the instrument
.
NOTE
The housing must be opened to install the options modules. The degree of protection IP65 is not guaranteed as long as the positioner is open.
To open the positioner, the four screws of the housing cover must be loosened with a Phillips screwdriver.
Disconnect or isolate the power supply cables.
Remove the module cover (1). To do this, the two screws (1.1) must be removed with a screwdriver .
NOTE
To prevent premature wearing of the fixture by the self--tapping screws (1.1), the following method of mounting the module cover (1) has proven effective.
1. Turn the screws counterclockwise until you feel them snap into the thread
2. Tighten both screws carefully in clockwise direction
Jy-module Insert the Jy-module (3) in bottom pcb rails of the container, establish
the electrical connection with the enclosed ribbon cable (6).
SIPART PS2 Manual A5E00074631-01
25
Design and Functional Principle
Alarm module Insert the alarm module (4) in the top pcb rails of the container,
establish the electrical connection with the enclosed ribbon cable (5).
SIA-module (Slot Initiator Alarm module) Proceed as follows for installation:
1. Remove all the electrical connections from the basic electronics (2).
2. Loosen the two fixing screws (2.1) of the basic electronics.
3. Snap out the basic electronic board by carefully bending the four holders.
4. Insert the SIA-module (7) from above up to the top pcb rail of the container.
5. Push the SIA module in the pcb rail of the container about 3 mm to the right.
6. Screw the special screw (7.1) through the SIA module into the axle of the positioner, please observe the following note: The pins pressed into the actuating disc bearing must be adjusted to just before touching with the special screw. The actuating disc bearing and the special screw must then be turned simultaneously so that the pins slot into the special screw.
7. Place the insulating cover (10) over the SIA module underneath the surface of the basic electronics board at the container wall on one side. The recesses in the insulating cover must slot into the corresponding lugs on the container wall. Place the insulating cover on the SIA module by carefully bending the container walls.
8. Snap the basic electronics board into the four holders and screw it tight again with the two fixing screws (2.1).
9. Make all the electrical connections between the motherboard and the options with the ribbon cables provided and between the mo­therboard and potentiometers with the potentiometer cable.
10. Fix the enclosed module cover instead of the standard version with the two screws.
1 1. Select the plates which already exist on the standard version of the
module cover from the set of plates enclosed. Stick the selected plates according to the standard version to the mounted module cover.
12. Make the electrical connections.
Setting the two limit values:
13. Drive the actuator to the first desired mechanical position.
26
14. Adjust the top actuating disc (for output terminals 41--42) by hand until the output level changes.
SIPART PS2 Manual
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Design and Functional Principle
15. Drive the actuator to the second desired mechanical position.
16. Adjust the bottom actuating disc (for output terminals 51--52) by hand until the output level changes.
.
NOTE
If you turn the actuating disc beyond the switching point up to the next switching point, you can set a high-low or a low-high change.
6
1
1.1
5
2.1
1.1
2.1
2
11
10
4
7
3
1 Module cover 7 SIA-module 2 Motherboard 7.1 Special screw
2.1 Fixing screws 8 Adjusting wheel slip clutch 3J
-module with ribbon cable (6) 9 Transmission ratio selector
y
4 Alarm module with ribbon cable (5) 10 Insulating cover 5 Ribbon cable for alarm module 11 Actuating disk bearings 6 Ribbon cable for Jy-module
Figure 2-10 Installation of Options Modules
7.1
8
9
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Design and Functional Principle

2.5.2 Options modules in explosion proof version

The options modules are protected and mechanically fixed by a module cover ((1), see figure 2-11, page 29).
.
!
Open the positio­ner
NOTE
The housing must be opened to install the options modules. The degree of protection IP65/NEMA4x is not guaranteed as long as the positioner is open.
WARNING
The explosion proof positioner may only be supplied with electrical power in areas in which the atmosphere may be potentially explosive when the housing is closed.
The feed--though openings for the electronic connections must be sealed with EEX-d certified cable glands or EEx-d certified plugs or an ignition lock must be mounted at a maximum distance of 46 cm (18 inches) when using the “conduit”--system.
Disconnect or isolate the power supply cables first.
To open the positioner, the safety catch (12) must be opened and the screw--on cover unscrewed.
.
After loosening the four fixing screws (13.1) the complete rack (13) can be removed. The actuator may have to be turned so that the clutch can be easily disengaged.
Remove the module cover (1). To do this, the two screws (1.1) must be removed with a screwdriver .
NOTE
To prevent premature wearing of the fixture by the self--tapping screw (1.1) next to the display, the following method of mounting the module cover (1) has proven effective.
1. Turn the screws counterclockwise until you feel them snap into the thread.
2. Tighten both screws carefully in clockwise direction.
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1.1
Design and Functional Principle
10
13.1
12
8
7
13.1
56
13
1
1.1
2
4
3
11
1 Module cover 7 Transmission ratio selector
1.1 Fixing screws 8 Adjusting wheel for slipping clutc 2 PA module 10 Housing 3J 4 Alarm module with ribbon cable 12 Safety catch 5 Ribbon cable for alarm module 13 Rack 6 Ribbon cable for J
module with ribbon cable 11 Screw-- on cover
y
module 13.1 Fixing screws
y
Figure 2-11 Installation of the options modules in the explosion proof version

2.5.3 HART-function

Function
SIPART PS2 Manual A5E00074631-01
The positioner is also available with built--in HART-functions. The HART protocol allows you to communicate with your instrument with a handheld communicatorR, PC or programming unit. This enables you to configure your instrument comfortably , save configurations, call dia­gnostic data, display online measured values and much more. Commu­nication takes place as frequency modulation over the existing signal lines for the command variable from 4 to 20 mA.
29
Design and Functional Principle
The SPART PS2 is integrated in the following parameterization tools:
- Handheld communicatorR
- PDM (Process Device Manager)
- AMS (Asset Management System; update in preparation)
- Cornerstone
.

2.5.4 Alarm module

Function
NOTE
Operation on the positioner has priority over the settings via the HART inetrface.
Communication is aborted by a power failure at the positioner.
The alarm module contains
- 3 digital outputs and
- 1 digital input
The digital outputs serve to output fault messages and alarms. The configuration is described in chapter 4.4, page 79, with the parameters 44 to 54.
By an external signal applied at digital input (DI2) the actuator can be blocked or driven to its limit positions for example depending on the configuration. The configuration is described in chapter 4.4, page 79, with the parameters 43.
30
The alarm module is available in two versions:
- explosion protected for connecting to switching amplifier DIN 19234
- non--explosion protected for connection to voltage sources with a
maximum 35 V
The semiconductor outputs of the alarm module report an alarm (signal state Low) by switching off with high resistance. They are conductive in the High state (without alarm). The dynamic control makes them error self--reporting.
The outputs are potentially isolated from the basic circuit and each other.
The digital input is double.
- one potential isolated for voltage level
- one not potential isolated for floating contacts
These two inputs are designed as logic OR links.
SIPART PS2 Manual
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