EBRO ARMATUREN EP 501 User manual

Quickstart
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Type EP 501
Electropneumatic positioner and process controller
Elektropneumatischer Positioner und Prozessregler
Positionneur et régulateur de process électropneumatique

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
Operating Instructions 1710/03_EU-ML_00806130 / Original DE

3 3
1 QUICKSTART .....................................................................................................5
1.1 Definition of term “device” .............................................................. 5
2 SYMBOLS ............................................................................................................5
3 INTENDED USE ................................................................................................6
3.1 Restrictions ........................................................................................ 6
4 BASIC SAFETY INSTRUCTIONS .............................................................6
5 GENERAL INFORMATION ...........................................................................7
5.1 Scope of supply................................................................................7
5.2 Contact address ...............................................................................7
5.3 Warranty ............................................................................................. 7
5.4 Information on the internet .............................................................7
6 DESCRIPTION OF SYSTEM .......................................................................8
6.1 General description .........................................................................8
6.2 Designs ............................................................................................... 8
6.3 Structure of the device ...................................................................9
7 TECHNICAL DATA ...........................................................................................9
7.1 Conformity .........................................................................................9
7.2 Standards ........................................................................................... 9
7.3 Operating conditions .......................................................................9
7.4 Type labels .......................................................................................10
7.5 Mechanical data .............................................................................10
7.6 Electrical data..................................................................................10
7.7 Pneumatic data ...............................................................................11
8 OPERATION .....................................................................................................12
8.1 Description of the operating and display elements ................12
8.2 Function of the keys .......................................................................13
9 OPERATING STATES .................................................................................. 14
9.1 Changing the operating state ......................................................14
9.2 Displays in AUTOMATIC mode .................................................... 14
9.3 Master code.....................................................................................15
10 OPERATING LEVELS .................................................................................. 16
10.1 Switching between the operating levels .................................16
11 ATTACHMENT AND ASSEMBLY ............................................................. 16
11.1 Installation of devices for the hazardous area .......................16
11.2 Attachment to a proportional valve with rotary actuator .....16
12 EXTERNAL PATH SENSOR .................................................................... 18
12.1 Connection of external position sensors
for type EP 501 L .........................................................................19
13 PNEUMATIC CONNECTION ....................................................................19
13.1 Safety end positions ....................................................................20
14 ELECTRICAL INSTALLATION ..................................................................22
14.1 Safety instructions ......................................................................22
14.2 Electrical installation with cable gland ....................................22
14.3 Terminal assignment for cable gland -
positioner Type EP 501 ..............................................................23
14.4 Terminal assignment for cable gland -
process controller Type EP 501 C ..........................................24
14.5 Terminal assignment for cable gland –
Typ EP 501 L ................................................................................25
Contents
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Type EP 501
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15 PROFIBUS DP ................................................................................................25
15.1 Designation of the circular connectors and contacts
Type EP 501 P ..............................................................................25
15.2 Electrical Installation PROFIBUS .............................................26
15.3 Electrical connection PROFIBUS ............................................28
16 START-UP .........................................................................................................28
16.1 Safety instructions .......................................................................28
16.2 Starting-up Type EP 501 ...........................................................28
16.3 Start-up Type EP 501 C ...........................................................30
17 PACKAGING, TRANSPORT, STORAGE .............................................32
18 DISPOSAL ........................................................................................................ 32
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Quickstart
1 QUICKSTART
Quickstart describes the entire life cycle of the device. Keep these
instructions in a location which is easily accessible to every user and
make these instructions available to every new owner of the device.
Important Safety Information!
Read Quickstart carefully and thoroughly. Study in particular the
chapters entitled „Intended use“ and „Basic safety instructions“.
▶Quickstart must be read and understood.
Quickstart explains, for example, how to install and start-up the device.
A detailed description of the device can be found in the operating
instructions for positioner Type EP 501 / EP 501 C.
The operating instructions can be found on the enclosed CD
and on the Internet at:
www.ebro-armaturen.com
1.1 Definition of term “device”
The term “device” used in these instructions always stands for the
Type EP 501 / EP 501 C / EP 501 L.
2 SYMBOLS
The following symbols are used in these instructions.
DANGER!
Warns of an immediate danger!
▶Failure to observe the warning may result in a fatal or serious
injury.
WARNING!
Warns of a potentially dangerous situation!
▶Failure to observe the warning may result in a serious or fatal
injury.
CAUTION!
Warns of a possible danger!
▶Failure to observe this warning may result in a medium or minor
injury.
NOTE!
Warns of damage to property!
Important tips and recommendations.
refers to information in these operating instructions or in
other documentation.
→designates a procedure which you must carry out.
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Intended use
3 INTENDED USE
Incorrect use of the device can be dangerous to people,
nearby equipment and the environment.
The device is designed for the open-loop control and closed-loop
control of media.
▶In the potentially explosion-risk area the device may be used only
according to the specification on the separate Ex type label. For
use observe the additional information enclosed with the device
together with safety instructions for the explosion-risk area.
▶Devices without a separate Ex type label may not be used in a
potentially explosive area.
▶The device must not be exposed to direct sunlight.
▶Pulsating direct voltage (rectified alternating voltage without
smoothing) must not be used as operating voltage.
▶During use observe the permitted data, the operating conditions
and conditions of use specified in the contract documents and
operating instructions, as described in chapter “„Description of
System“ - „Technical Data“ in this manual and in the valve manual
for the respective pneumatically actuated valve.
▶The device may be used only in conjunction with third-party devices
and components recommended and authorised by Ebro.
▶In view of the wide range of possible application cases, check
whether the device is suitable for the specific application case
and check this out if required.
▶Correct transportation, correct storage and installation and care-
ful use and maintenance are essential for reliable and faultless
operation.
▶Use the device only as intended.
3.1 Restrictions
If exporting the system/device, observe any existing restrictions.
4 BASIC SAFETY INSTRUCTIONS
These safety instructions do not make allowance for any
• contingencies and events which may arise during the installation,
operation and maintenance of the devices.
• local safety regulations – the operator is responsible for observing
these regulations, also with reference to the installation personnel.
Danger – high pressure!
▶Before loosening the pneumatic lines and valves, turn off the
pressure and vent the pneumatic lines.
Risk of electric shock!
▶Before reaching into the device or the equipment, switch off the
operating voltage and secure to prevent reactivation!
▶Observe applicable accident prevention and safety regulations
for electrical equipment!
Risk of burns/risk of fire if used continuously through hot
device surface!
▶Keep the device away from highly flammable substances and
media and do not touch with bare hands.
General hazardous situations.
To prevent injury, ensure that:
▶That the system cannot be activated unintentionally.
▶The device may be operated only when in perfect condition and
in consideration of the operating instructions.
▶Installation and repair work may be carried out by authorised
technicians only and with the appropriate tools.
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General information
▶After an interruption in the operating voltage or pneumatic sup-
ply, ensure that the process is restarted in a defined or con-
trolled manner.
▶Do not supply the supply pressure connection of the system
with aggressive or flammable mediums.
▶Do not supply the supply pressure connection with any liquids.
▶Do not put any loads on the housing (e.g. by placing objects on
it or standing on it).
▶Do not make any external modifications to the device housings.
Do not paint the housing parts or screws.
▶The general rules of technology apply to application planning
and operation of the device.
NOTE!
Electrostatic sensitive components / modules!
The device contains electronic components which react sensitively
to electrostatic discharge (ESD). Contact with electrostatically
charged persons or objects is hazardous to these components. In
the worst case scenario, they will be destroyed immediately or will
fail after start-up.
• Observe the requirements in accordance with EN 61340-5-1 to
minimise or avoid the possibility of damage caused by sudden
electrostatic discharge!
• Also ensure that you do not touch electronic components when
the operating voltage is present!
5 GENERAL INFORMATION
5.1 Scope of supply
Generally the product package consists of:
The device and the associated operating instructions
We will provide you with attachment kits for linear actuator
or rotary actuators as accessories.
If there are any discrepancies, please contact us immediately.
5.2 Contact address
Germany EBRO ARMATUREN Gebr. Bröer GmbH
Karlstraße 8
D-58135 Hagen
Tel. + 49 (0) 2331 - 904 0
Fax + 49 (0) 2331 - 904 111
E-mail: [email protected]
International
International contact addresses can be found on the internet at:
www.ebro-armaturen.com
5.3 Warranty
The warranty is only valid if the device is used as intended in accordance
with the specified application conditions.
5.4 Information on the internet
The operating instructions and data sheets for the device can be
found on the Internet at: www.ebro-armaturen.com
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Description of System
6 DESCRIPTION OF SYSTEM
6.1 General description
The positioner Type EP 501 / process controller Type EP 501 C
is a digital, electro-pneumatic position controller for pneumatically
actuated proportional valves. The device incorporates the main
function groups
- Position sensor
- Microprocessor electronics
- Electro-pneumatic control system
The position sensor measures the current positions of the proportional
valve.
The microprocessor electronics continuously compare the current position
(actual value) with a set-point position value specified via the standard
signal input and supplies the result to the positioner/process controller.
If there is a control difference, the electro-pneumatic control system
corrects the actual position accordingly.
The device is operated with a 128 x 64 dot matrix graphics display
and a keypad with 4 keys.
6.2 Designs
6.2.1 Type EP 501, positioner
The position of the actuator is regulated according to the position
set-point value. The position set-point value is specified by an external
standard signal (or via field bus).
6.2.2 Type EP 501 C, process controller
Type EP 501 C also features a PID controller which, apart from actual
position control, can also be used to implement process control (e.g.
level, pressure, flow rate, temperature) in the sense of a cascade control.
The process controller is linked to a control circuit. The position set-
point value of the valve is calculated from the process set-point value
and the actual process value via the control parameters (PID controller).
The process set-point value can be set by an external signal.
6.2.3 Type EP 501 L remote operation with external
position sensor
In case of this model, type EP 501 C has no internal position
sensor in the form of a rotary position sensor, but is connected to
an external 4–20 mA remote sensor. As this is connected via the
analog interface, type EP 501 L can be operated as a positioner
(position controller) only.
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Technical Data
6.3 Structure of the device
Mechanical position indicator
Operating module with display
and keys
Working connection 2
(connection: A2)
Supply pressure
connection 1.4 – 7 bar
(connection: P)
Working connection 1
(connection: A1)
Air exhaust connection/
air exhaust filter
Internal position sensor
Shaft for position sensor
Cable bushing
Electronic module
Control system
Pressure-
relief valve
Fig. 1: Structure Type EP 501 / EP 501 C
7 TECHNICAL DATA
7.1 Conformity
In accordance with the Declaration of conformity, Type EP 501 / EP
501 C / EP 501 L is compliant with the EC Directives.
7.2 Standards
The applied standards, which verify conformity with the EC Direc-
tives, can be found on the EC-Type Examination Certificate and / or
the EC Declaration of Conformity.
7.3 Operating conditions
NOTE!
If used outside, the device may be exposed to direct sunlight
and temperature fluctuations which may cause malfunctions
or leaks!
• If the device is used outdoors, do not expose it unprotected to
the weather conditions.
• Ensure that the permitted ambient temperature does not exceed the
maximum value or drop below the minimum value.
Environmental temperature The permitted temperature range is
given on the type label of the device.
Degree of Protection: IP 65 / IP 67* according to EN 60529
(only if cables, plugs and sockets have been
connected correctly).
* If the device is used under IP 67 conditions, the ventilation must be
removed and the exhaust air conducted into the dry area (see „Fig. 1“)
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Technical Data
7.4 Type labels
Description of standard type label:
Type
EP 501 24V DC
P = 1,4 ... 7 bar
IP65 / IP67
Tamb -10 ... +60°C
S/N 1055
00211958 W18ML
Operating voltage
Exemple:
Identification number
Degree of protection
Pressure range
Ambient temperature
Serial number
Fig. 2: Exemple standard type label
Description of additional label for Ex approval:
Devices, which may be used in the explosion-protected area, are
identified by the additional label for the Ex approval.
II 3 G Ex nA IIC T4
II 3 D Ex tD A22 T135°C
Warning:
1. Do not open under
explosive atmosphere
2. In Hazardous Areas the surface
may only be cleaned with a wet towel
Fig. 3: Additional label for Ex approval
7.5 Mechanical data
Dimensions See data sheet
Mass approx. 1.0 kg
Material
Housing material Plastic-coated aluminium
Other external parts Stainless steel (V4A), PC, PE, POM, PTFE
Sealing material EPDM, NBR, FKM
7.6 Electrical data
Protection class 3 in accordance with VDE 0580
Connections 2 cable glands (M20 x 1.5) with screw-
type terminals 0.14 – 1.5 mm2 or circular
plug-in connector
Operating voltage 24 V DC ± 10% max. residual ripple 10%
Power consumption < 5 W
Input data for actual value signal
4 ... 20 mA: Input resistance 180 Ω
Resolution 12 bit
Frequency: Measuring range 0 ... 1000 Hz
Input resistance 17 kΩ
Resolution 1‰ vom Messwert,
Input signal > 300 mVss
Signal form Sine, rectangle, triangle
Pt 100: Measuring range -20 ... +220 °C
Resolution < 0,1 °C
Measurement current < 1 mA
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Technical Data
Input data for set-point value signal
0/4 ... 20 mA: Input resistance 180 Ω
Resolution 12 bit
0 ... 5/10 V: Input resistance 19 kΩ
Resolution 12 bit
Analogue feedback
max. current 10 mA
(for voltage output 0 ... 5/10 V)
Burden (load) 0 ... 560 Ω
(for voltage output 0/4 ... 20 mA)
Inductive proximity
switches 100 mA current limit
Binary outputs galvanically isolated
Current limiting 100 mA, output is clocked if overload
occurs
Binary input galvanically isolated
0 ... 5 V = log „0“, 10 ... 30 V = log „1“
inverted input in reverse order
(input current < 6 mA)
7.7 Pneumatic data
Control medium Quality classes in accordance with DIN ISO
8573-1
Dust content Class 5, max. particle size 40 µm,
max. particle density 10 mg/m³
Water content Class 3, max. pressure dew point - 20 °C or
min. 10 degrees below the lowest operating
temperature
Oil content Class 5, max. 25 mg/m³
Temperature range
of compressed air 0 ... +60 °C
Pressure range 1.4 – 7 bar
Air flow rate 95 lN / min (at 1.4 bar*) for aeration and
deaeration
150 lN / min (at 6 bar*) for aeration and
deaeration
(QNn = 100 lN / min (according to definition for
pressure drop from 7 to 6 bar absolute)).
Connections Internal thread G1/4“
* Pressure specifications: Overpressure with respect to
atmospheric pressure
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Operation
8 OPERATION
8.1 Description of the operating and
display elements
Abbreviated designation for
the displayed process value
Operating elements:
Process value *
Unit of the displayed
process value
Designation for the function
of the keys
Right selection key
Arrow key , down arrow
Arrow key , up arrow
Left selection key
Display elements of the process level:
Save symbol
Symbol for position control
Symbol for process control
Symbol for the AUTOMATIC operating state
Other symbols are displayed according to the activated functions.
See operating instructions Type EP 501
Fig. 4: Display elements of the process level; operating elements
Submenu
Designation for the function
of the keys
Display elements
of the setting level:
Menu designation
Operating elements:
Description see "„Fig. 4“"
Fig. 5: Display elements of the setting level
The display is adjusted to the set functions and operating levels.
In principle, a distinction can be made between the display view for
the process level and the setting level.
When the operating voltage has been applied, the process level is
displayed.
* The process values which can be displayed in the AUTOMATIC
operating state depend on type.
A detailed description can be found in the operating instructions
for the device.
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Operation
8.2 Function of the keys
The function of the 4 keys in the control field differs depending on
the operating state (AUTOMATIC or MANUAL) and operating level
(process level or setting level).
The key function which is active is displayed in the gray text field
which is above the key.
Key function on the process level:
Key Key function Description of the
function
Operating
state
Arrow key OPN
(OPEN)
Manual opening of the
actuator MANUAL
Change the displayed value
(e.g. POS-CMD-TEMP-...) AUTOMATIC
Arrow key CLS
(CLOSE)
Manual closing of the
actuator MANUAL
Change the displayed value
(e.g. POS-CMD-TEMP-...) AUTOMATIC
Selection key MENU Change to the setting level
Note: Press key for
approx. 3 s.
AUTOMATIC
or MANUAL
Selection key AUTO Return to AUTOMATIC
operating state MANUAL
MANUAL Change to MANUAL oper-
ating state AUTOMATIC
Key function on the setting level:
Key Key function Description of the function
Arrow key Scroll up in the menus
+ Increase numerical values
Arrow key Scroll down in the menus
– Decrease numerical values
< – Change by one digit to the left; when
entering numerical values
Selection key EXIT (BACK) Return to the process level
Gradually return from a submenu
option
ESC Leave a menu
STOP Stop a sequence
Selection key ENTER
SELEC
OK
INPUT
Select, activate or deactivate a menu
option
EXIT (BACK) Gradually return from a submenu
option
RUN Start a sequence
STOP Stop a sequence
Tab. 1: Function of the keys
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Operating states
9 OPERATING STATES
The device has 2 operating states:
AUTOMATIC and MANUAL.
AUTOMATIC
MENU CMD POS MANU
POS 0.0
In the AUTOMATIC operating state normal
controlled operation is implemented.
(The symbol for AUTOMATIC is
shown on the display. A bar runs along
the top of the display).
MANUAL
MENU OPN CLS AUTO
POS 0.0
In the MANUAL operating state the
valve can be manually opened or closed
via the arrow keys (key function
OPN and CLS ).
(The symbol for AUTOMATIC is
hidden. No bar running along the top of
the display).
9.1 Changing the operating state
Change to MANUAL operating state
(only available for process value
display: POS, CMD, PV, SP)
MANU press
Return to AUTOMATIC operating
state
AUTO press
9.2 Displays in AUTOMATIC mode
Type EP 501 Description of the display Type EP 501 C
MENU
CMD/POS
CMD MANU
POS 0.0
Actual position of the valve
actuator (0 – 100%)
MENU SP/PV CMD MANU
POS
0.0
MENU POS TEMP MANU
CMD 0.0
Set-point position of the valve
actuator (0 – 100%)
MENU POS TEMP MANU
CMD
0.0
MENU CMD
CMD/POS
TEMP
0.0

C
Internal temperature in the
housing of the positioner ( °C)
MENU CMD PV
TEMP
0.0

C
Process actual value
MENU TEMP SP MANU
PV
0.0
m3/min
Process set-point value
MENU PV PV (t) INPUT
SP
0.0
m3/min
Simultaneous display of the
set-point position and the
actual position of the valve
actuator (0 – 100 %)
MENU
CMD/POS
POS MANU
0.0
SP
PV
0.0
m3/min
m3/min
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Operating states
Type EP 501 Description of the display Type EP 501 C
Graphical display of SP and PV
with time axis
MENU HOLD
SP / PV (t)
MENU HOLD
CMD / POS (t)
Graphical display of POS and
CMD with time axis
MENU HOLD
CMD / POS (t)
MENU
CMD/POS
CLOCK
INPUT
4.0
mA
Input signal for
set-point position
(0 – 5/10 V / 0/4 – 20 mA)
MENU
INPUT X.TUNE
INPUT
12:0000
Thu. 01 . 09 . 11
CLOCK
Time, weekday and date
MENU
POS (t)
X.TUNE
INPUT
12:0000
Thu. 01 . 09 . 11
CLOCK
MENU CLOCK
CMD/POS
RUN
X.TUNE
Automatic adjustment of the
positioner (position controller)
MENU CLOCK P.TUNE RUN
X.TUNE
Automatic optimization of the
process controller parameters
MENU X.TUNE P.LIN RUN
P.TUNE
Type EP 501 Description of the display Type EP 501 C
Automatic linearization of the
process characteristics
MENU P.TUNE
CMD/POS
RUN
P.LIN
MENU X.TUNE POS MANU
0.0
CMD
POS
0.0
Simultaneous display of the
set-point position and the
actual position of the valve
actuator (0 – 100 %)
MENU P.LIN SP/PV MANU
0.0
CMD
POS
0.0
9.3 Master code
Operation of the device can be locked via a freely selectable user
code. In addition, there is a non-changeable master code with
which you can perform all operator control actions on the device.
This 4-digit master code can be found on the last pages of these
operating instructions in the chapter “Master code”.
If required, cut out the code and keep it separate from these oper-
ating instructions.
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Operating levels
10 OPERATING LEVELS
There is the process level and the setting level for the operation and
setting of the device.
Process level:
The running process is displayed and operated on this level.
Operating state: AUTOMATIC – Displays of the process data
MANUAL – Manual opening and closing of
the valve
Setting level:
The basic settings for the process are made on this level.
Inputting the operating parameters
Activating auxiliary functions
If the device is in the AUTOMATIC operating state when
changing to the setting level, the process continues running
during the setting.
10.1 Switching between the operating
levels
Change to the setting level MENU Press for
3 seconds
Return to the process level EXIT press briefly
11 ATTACHMENT AND ASSEMBLY
11.1 Installation of devices for the
hazardous area
When installing devices in the explosion-protected area, observe the
“Additional information for use in the hazardous area” enclosed with
the Ex-devices.
11.2 Attachment to a proportional valve with
rotary actuator
The shaft of the position sensor integrated in the positioner is con-
nected directly to the shaft of the rotary actuator.
WARNING!
Risk of injury from improper installation!
▶Installation may be carried out by authorised technicians only
and with the appropriate tools!
Risk of injury from unintentional activation of the system and
an uncontrolled restart!
▶Secure system from unintentional activation.
▶Following assembly, ensure a controlled restart.
Procedure:
→Specify the attachment position of the device:
- parallel to the actuator or
- rotated by 90° to the actuator.
→Determine home position and direction of rotation of the actuator.
→Connect adapter to the shaft of the device and secure with 2
setscrews.
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Attachment and assembly
Anti-twist safeguard:
Note the flat side of the shaft!
One of the setscrews must be situated on the flat side of the shaft
as an anti-twist safeguard (see „Fig. 6“).
Rotation range of the position sensor:
The maximum rotation range of the position sensor is 180°.
The shaft of the Type EP 501 / EP 501 C may be moved within this
range only.
90°
Ideal position
for the swing range
of the flattened shaft
(min. 30 ° / max. 180 °).
The swing movement of the flattened
shaft must be within the position
sensor turning range of 180°.
Flattened shaft
180°
Maximum
swing range
Fig. 6: Rotation range / anti-twist safeguard
→Assemble the multi-part assembly bridge* suitable for the
actuator.
→Attach the assembly bridge to the Type EP 501/EP 501 C using
4 cheese-head screws ③ and circlips ④ (see „Fig. 7“).
③
④
* The assembly bridge consists of 4 parts
which can be adjusted to the actuator by
varying the arrangement.
Fig. 7: Attach assembly bridge (schematic representation)
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External path sensor
→Place Type EP 501/EP 501 C with assembly bridge on the
rotary actuator and attach (see „Fig. 8“).
Fig. 8: Rotary actuator attachment
If the X.TUNE ERROR 5 message is indicated on the
graphics display after the X.TUNE function starts, the shaft of
the Type EP 501 / EP 501 C is not correctly aligned with the
shaft of the actuator.
• Check alignment (as described previously in this chapter).
• Then repeat the X.TUNE function.
12 EXTERNAL PATH SENSOR
In case of this model, type EP 501 C has no internal position
sensor in the form of a rotary position sensor, but is connected to
an external 4–20 mA remote sensor. As this is connected via the
analog interface, type EP 501 L can be operated as a positioner
(position controller) only.
Type Interface Sensor Setting in the menu
(ADD.FUNCTION)
EP 501 L analog
(4 – 20 mA) *
Any, high-reso-
lution path sensor
POS.SENSOR
→ ANALOG
Tab. 2: Connection of external position sensors for type EP 501 L
In principle, any path sensor with a 4 – 20 mA output can be con-
nected which has an adequate resolution of the path signal.
Good control properties are obtained if the resolution of the path
sensor allows at least 1000 measuring steps over the path to be
measured.
Example: Path sensor with 150 mm measurement range
Of which used measurement range (= stroke) 100 mm
Required minimum resolution of the sensor:
100 mm = 0.1 mm
1000 Steps
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Pneumatic connection
12.1 Connection of external position
sensors for type EP 501 L
→Connect 4 – 20 mA path sensor to the terminals 1 - 4 of the
type EP 501 L (see chapter „14.5.1 Terminal assignments of the
process actual value input“).
Internal supply of the path sensor by Type EP 501 L:
→ Connection according to input type “4 – 20 mA - internally
supplied”.
Separate supply of the path sensor:
→ Connection according to input type “4 – 20 mA - externally
supplied”.
→Attach remote sensor on the actuator.
The correct procedure is described in the instructions for the
path sensor.
→Connect compressed air to the Type EP 501 L.
→Connect Type EP 501 L pneumatically to the actuator.
→Switch on Type EP 501 L operating voltage.
→To obtain the best possible control precision, adjust the path
sensor so that path to be measured corresponds to the signal
range 4 – 20 mA (only if the path sensor includes this function).
→In the ADD.FUNCTION menu activate the POS.SENSOR
function. Then select POS.SENSOR in the main menu and set
ANALOG.
The procedure is described in the operating instructions for the
device in the chapter “Starting up and operation of the process
controller / auxiliary functions / POS.SENSOR”.
→Run the X.TUNE function.
13 PNEUMATIC CONNECTION
DANGER!
Risk of injury from high pressure in the equipment!
▶Before loosening the pneumatic lines and valves, turn off the
pressure and vent the pneumatic lines.
WARNING!
Risk of injury from improper installation!
▶Installation may be carried out by authorized technicians only
and with the appropriate tools!
Risk of injury from unintentional activation of the system and
an uncontrolled restart!
▶Secure system from unintentional activation.
▶Following installation, ensure a controlled restart.
Working connection 2
(connection: A2)
Supply pressure connection
1.4 – 7 bar (connection: P)
Working connection 1
(connection: A1)
Deaeration connection
Fig. 9: Pneumatic installation / Location of the connections
english
Type EP 501

20
Pneumatic connection
Procedure:
→Apply supply pressure (1.4 – 7 bar) to the supply pressure con-
nection P.
For single-acting actuators (control function A and B):
→Connect one working connection (A1 or A2, depending on
required safety end position) to the chamber of the single-acting
actuator.
Safety end positions see chapter„13.1.1“.
→Seal a working connection which is not required with a plug.
For double-acting actuators (control function I):
→Connect working connections A1 and A2 to the respective
chambers of the double-acting actuator.
Safety end positions see chapter „13.1.2“.
Important information for perfect control behaviour!
This ensures that the control behaviour is not extremely
negatively affected in the upper stroke range on account of
too little pressure difference.
• keep the applied supply pressure at least 0.5 – 1 bar
above the pressure which is required to move the pneu-
matic actuator to its end position.
If fluctuations are greater, the control parameters measured
with the X.TUNE function are not optimum.
• during operation keep the fluctuations of the supply
pressure as low as possible (max. ±10%).
13.1 Safety end positions
The safety end position following failure of the auxiliary electrical
power depends on the pneumatic connection of the actuator to the
working connections A1 or A2.
13.1.1 Single-acting actuators
Actuator system
Safety end positions after failure of the
electrical
auxiliary power
pneumatic
auxiliary power
up
down
down
→Connection
according to
„Fig. 10“ down
up
→Connection
according to
„Fig. 11“
Control function A
up
down
up
→Connection
according to
„Fig. 10“ up
down
→Connection
according to
„Fig. 11“
Control function B
Tab. 3: Safety end positions - single-acting actuators
english
Type EP 501