Samson 3780 series Service manual

Positioner with HART® communication
Type 3780
Mounting and
Operating nstructions
EB 8380-1 EN
Firmware R 2.22/K 2.23
Edition June 2004
Fig. 1 ⋅Type 3780
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Contents Page
1. Design and principle of operation . . . . . . . . . . . . . . . . . . . . . . 10
1.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2. Attachment to the control valve . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Direct attachment to Type 3277 Actuator . . . . . . . . . . . . . . . . . . . 14
2.2 Attachment according to I C 60534-6 . . . . . . . . . . . . . . . . . . . . 18
2.2.1 Mounting sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.2 Presetting the valve travel . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3 Attachment to rotary valves . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.3.1 Mounting the cam follower roll lever . . . . . . . . . . . . . . . . . . . . . 22
2.3.2 Mounting the intermediate piece . . . . . . . . . . . . . . . . . . . . . . . 22
2.3.3 Aligning and mounting the cam disk . . . . . . . . . . . . . . . . . . . . . 24
2.3.4 Reversing amplifiers for double-acting actuators . . . . . . . . . . . . . . . . 26
2.4 Fail-safe action of the actuator . . . . . . . . . . . . . . . . . . . . . . . . 26
3. Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1 Pneumatic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1.1 Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1.2 Supply air pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2 lectrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2.1 Switching amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2.2 stablishing communication . . . . . . . . . . . . . . . . . . . . . . . . . 32
4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.1 Write protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.2 Activate/deactivate forced venting function . . . . . . . . . . . . . . . . . . 34
4.3 Default setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.1 Adjusting mechanical zero point . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.2 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.4 Adjusting inductive limit switches . . . . . . . . . . . . . . . . . . . . . . . 37
5. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
. Servicing explosion-protected versions . . . . . . . . . . . . . . . . . . . . 38
7. Summary of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8. List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9. Error messages and diagnostics . . . . . . . . . . . . . . . . . . . . . . . 53
9.1 Information/alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.2 rror messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Contents
2EB 8380-1 EN
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9.3 rror messages during initialization without abortion . . . . . . . . . . . . 59
9.4 rror messages during initialization with abortion . . . . . . . . . . . . . . 60
Dimensional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Type examination certificates . . . . . . . . . . . . . . . . . . . . . . . 63
Safety instructions
Assembly, commissioning and operation of the device may only
be performed by trained and e perienced personnel familiar
with this product. According to these mounting and operating in-
structions, trained personnel is referred to persons who are able
to judge the work they are assigned to and recognize possible
dangers due to their specialized training, their knowledge and
e perience as well as their knowledge of the relevant standards.
E plosion-protected versions of this device may only be oper-
ated by personnel who have undergone special training or in-
structions or who are authorized to work on e plosion-protected
devices in hazardous areas. See section 6 for more details.
For devices in type of protection EE nA, the following applies:
live circuits may only be connected, interrupted, and switched
for installation, maintenance or repair purposes.
Devices that have already been used outside of hazardous areas
and are intended for use in hazardous areas in future shall com-
ply with the safety demands placed on serviced devices. Prior to
operation, they shall be tested according to paragraph 26 "Re-
pairing e plosion-protected devices" of EN 50014:2000 to
meet the safety requirements specified in this standard.
Any hazards which could be caused by the process medium, the
signal pressure and moving parts of the control valve are to be
prevented by means of appropriate measures.
If inadmissible motions or forces are produced in the actuator as
a result of the level of the supply air pressure, this must be re-
stricted by means of a suitable pressure reducing station.
Proper shipping and appropriate storage are assumed.
Note: Devices with the CE mark meet the requirements specified in the
Directive 94/9/EC and the Directive 89/336/EEC.
The Declaration of Conformity is available on request.
EB 8380-1 EN 3
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Modifications of positioner firmware
Modifications of positioner firmware in comparison to previous version
Former New
For more details on the listed parameters, please also refer to the
list of parameters in section 8.
Positioner R 1.41 R 2.01
Parameters:
Operating direction Direction of action
The reference variable (w) is not assigned to the output signal
pressure (y) anymore, but to the travel/angle of rotation (x).
>> increasing/increasing, valve opens with increasing reference
variable.
<> increasing/decreasing, valve closes with increasing reference
variable.
Minimum transit time
filling/venting
Minimum transit time open/closed
The measured time is not referenced to filling/venting the
actuator, but to the opening and closing the valve.
Required transit time
filling/venting
Required transit time open/closed
The actuating time is not referenced to filling/venting the actuator,
but to the opening and closing the valve.
Cycle time factor
K_IS
Omitted
Initialization For version R2.02 or higher, an alarm message is generated for
deviations larger than 10 % when the type of initialization is
maximum range. It is for the user to decide if he wants to tolerate
the deviation.
Tolerated overshoot If overshoot and dead band are exceeded by the negative
deviation value, the pulse is adapted.
Text field Free space for storing information text in the field device.
4EB 8380-1 EN
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Modifications of positioner firmware
Former New
Positioner 2.02 R 2.11
Parameters:
Minimum pulse
filling/venting
The minimum pulses for filling and venting are determined for
the travel ranges 0 to 20 %, 20 to 80 % and 80 to 100 %. The
minimum pulses are no longer determined during initialization.
Proportional-action
coefficient
KP_Y1 and KP_Y2
These factors are adapted to the actuator type selected and to
the transit times measured.
Gain factor
KD
Initialization "Air leakage of pneumatic system" is displayed as alarm
message, but does not cause abortion of initialization anymore.
Upon initialization in the "nominal range", the positioner
assumes only 100 % travel (no overtravel).
"Wrong selection of rated travel/angle of rotation or
transmission" is displayed as alarm message, but does not cause
abortion of initialization anymore.
Positioner 2.11 R 2.21
Type of actuator Change over type of actuator from "linear actuator" to "rotary
actuator"
Initialization type .................Based on maximum range
Transmission code................S90
Nominal angle.....................90°
nd position when w <..........1 %
nd position when w >..........99 %
Rotational angle range start .. 0°
Rotational angle range end ... 90°
Change over type of actuator from "rotary actuator" to "linear
actuator"
Attachment .........................Integral...............................Acc. to NAMUR
Initialization type .................Based on nominal range.......Based on nominal range
Mounting position................Arrow towards actuator........Arrow away from actuator
Transmission code................D1......................................
Pin position.......................... ........................................A
Rated travel .........................15 mm ................................15 mm
nd position when w <..........1 % .....................................1 %
nd position when w >..........125 %.................................125 %
Travel range start..................0 mm ..................................0 mm
Travel range end ..................15 mm ................................15 mm
Length of lever...................... ........................................42 mm
EB 8380-1 EN
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Modifications of positioner firmware
End position when w
</>
Changing the type of initialization from "maximum range" to
"nominal range" causes:
nd position at < 1 % nd position at > 125 %
Changing the type of initialization from "nominal range" to
"maximum range" causes:
nd position at < 1 % nd position at > 99 %
Extended
valve diagnostics
Supports TROVIS- XP RT in version 1.0 or higher
Required transit time
open/closed
The adjustment range for the required transit times has been
limited to 75 s. Safe functioning can only be guaranteed up to
this limit value.
Initialization During initialization, the minimum control pulses for the range
20 % to 80 % of the range of the manipulated variable are
determined and saved in the PROM.
Proportional-action
coefficient
KP_Y1 and KP_Y2
These factors are adapted to the type of actuator chosen and the
transit times measured.
Positioner 2.21 R 2.22
Correction in "manual" operating mode and direction of action
Correction in zero calibration started via communication
Communication K 1.00 K 2.01
Characteristic type Free space for entering information on the description of the
user-defined characteristic saved in the device. Can be stored in
the field device.
For version K 2.02 or higher, when selecting [equal percentage]
or [equal percentage reverse], the description text in parameter
characteristic type of the device is automatically set to the
selection made.
Communication K 2.02 K 2.11
Supports all functions of R 2.11
Type of initialization For K 2.11 or higher, the default value is "maximum range"
End position when w > For K 2.11 or higher, the default value is 99 %
6EB 8380-1 EN
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Positioner versions
Former New
Communication
K 2.13 K 2.21
Supports all functions of R 2.21 as well as TROVIS- XP RT in
version 1.0 or higher
Communication
K 2.21 K 2.22
Supports all functions of R 2.21 as well as TROVIS-VI Win
version 2.0 or higher
New for model index 3780-x...x. 01 or higher: Write protection switch
If this option is activated using the switch, the positioner settings cannot be written over by
HART® communication. See section 4.1 for more details on the write protection switch.
Model index 3780-x...x. 03 or higher are suitable for the extended valve diagnosis using
the TROVIS- XP RT software.
Positioner versions
Model 3780 - XXXXX
xplosion
protection
Without
x II 2 G x iA IIC T6 as per AT X
CSA/FM
x II 3 G x nA II T6 as per AT X
0
1
3
8
Additional
accessories
Limit switches Without
2 inductive
2 software
0
2
3
Forced venting Without
With
0
1
Position transmitter Without
4...20 mA
0
1
Pneumatic
connections
NPT 1/4-18
ISO 228/1-G 1/4
1
2
EB 8380-1 EN 7
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Positioner
Rated travel, adjustable Direct attachm. 5 to 30mm
Attachment acc. to I C 60534-6 (NAMUR), 5 to 255 mm or 30 to 120° C
Reference variable Two-wire connection, signal range 4 to 20 mA, span 4 to 16 mA
Min. current = 3.6 mA, load ≤10.8 V (corresponding to 540
Ω at 20 mA),
static destruction limit 500 mA
Supply Supply air from 1.4 to 6 bar (20 to 90 psi)
Signal pressure (output) 0 bar to pressure of supply air
Characteristic, adjustable Linear, equal percentage, reverse equal percentage, user-programmable
Deviation from characteristic
≤1 %
Dead band Adjustable from 0.1 to 10 %, default 0.5 %
Resolution ≤0.05 %
Transit time to travel Up to 75 s, separately adjustable for exhaust and supply air
Moving direction Reversible, adjustment via software
Air consumption Independent of supply air <90l

/h
Air delivery Actuator filled: for
Δp = 6 bar 9.3 m

/h, for Δp = 1.4 bar 3.5 m

/h
Actuator vented: for
Δp = 6 bar 15.5 m

/h, for Δp = 1.4 bar 5.8 m

/h
Perm. ambient temperature − 20 to 80 °C, with metal cable gland
− 40 to 80 °C
Devices with position transmitter only
− 20 to 80 °C
For explosion-protected devices, see type examination certificate in appendix
ffects Temperature: ≤0.15 %/10 K, supply: none, vibrations: none up to 250 Hz and 4 g
xplosion protection x ia IIC T6, see type examination certificate
Degree of protection IP 65 by using the filter check valve included
lectromagnetic
compatibility
Requirements stipulated in N 61000-6-2, N 61000-6-3 as well as NAMUR
Recommendation 21 have been met
lectrical connections 1 cable gland M20x1.5, black plastic;
other threaded hole M20x1.5 available
Fault alarm output For connection to switching amplifier acc. to N 60947-4-6, static destruction limit 16 V
Forced venting
(model index .03 or
higher)
Activated/deactivated by a switch inside case
Input: 6...24 V DC, R

approx. 6 kΩ, at 24 V DC (depending on voltage), switching point
for "1" signal at
≥ 3 V, signal "0" only at 0 V, K

value 0.17; static destruction limit 45 V
Technical data
8EB 8380-1 EN
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Communication
Hardware requirements SAMSONs TROVIS-VI W Operator Interface (see Data Sheet T 6661 N) or handheld
communicator, e.g. Type 275 by Rosemount
Integration of other operator interfaces, e.g. DTM, are available
Data transmission HART
®
Field Communication Protocol
Impedance in HART
®
frequency range: receive: 350 to 450
Ω; send: approx. 115Ω
Accessory equipment
Inductive limit switches Two Type SJ 2 SN Prox. Switches for connection to switching amplifier acc. to N 60947-5-6
Software limit switches Two configurable limit values for connection to switching amplifier acc. to N 60947-5-6
Switching hysteresis 1%, static destruction limit 16 V
Analog position
transmitter
Two-wire transmitter, output 4 to 20 mA
Supply: terminal voltage 12 to 35 V DC, static destruction limit 40 V
Direction of action reversible, characteristic linear, operating range: 10 % to + 114 %
DC current signal ripple content: 0.6 % at 28 Hz/I C 381 T1
Resolution≤0.05 %
HF influence <2 % with f= 50 to 80 Mhz
Influence aux. supply: none; temperature influence: same as positioner
Materials (numbers according to DIN)
Case Die-cast aluminum, chromed and plastic-coated
xternal parts: stainless steel 1.4571 and 1.4301
Weight Approx. 1.3 kg
Versions
EB 8380-1 EN 9
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1. Design and principle of operation
The positioner essentially consists of an in-
ductive, non-contact travel measuring sys-
tem and an electrically controlled valve
block comprising two 2/2-way on-off
valves and an electronic unit. This unit con-
tains two microcontrollers for processing the
control algorithm and managing the com-
munication.
Whenever a deviation between the actual
valve travel (actual value) and the reference
variable (set point) occurs, the microcontrol-
ler produces binary pulse-pause modulated
signals to control the two 2/2-way on-off
valves, each of which is assigned an am-
plifier. One of these valves controls the ex-
haust air, and the other one controls the sup-
ply air.
The supply air valve (3) switches the supply
air (7, supply air pressure 1.4 to 6 bar) to
the actuator (filling). The exhaust air valve
(4) controls the air exhausted from the actu-
ator to the atmosphere (venting). These on-
off valves can either have the switching
states - permanently open, permanently
closed - or generate single pulses of chang-
ing widths. With the two valves being con-
trolled, the plug stem moves to a position
corresponding to the reference variable. If
there is no system deviation, both the supply
air and the exhaust air valve are closed.
As a standard feature, the positioner is
equipped with a fault alarm output (binary
output according to N 60947-5-6) used to
signalize a fault to the control room.
Activating the write protection switch lo-
cated in the hinged cover prevents the posi-
tioner settings from being overwritten by the
HART® protocol.
Forced venting function
The positioner is controlled via a 6 to
24 V signal, causing the signal pressure
to be applied to the actuator. If this volt-
age signal decreases, the signal pressure is
shut off and the actuator is vented. The
springs contained in the actuator move the
valve to its fail-safe position.
The forced venting function is installed in all
positioners from model index .03 or higher.
The function can be activated or deacti-
vated by a switch. See section 4.2 (page
34) for more details.
1.1 Options
As a supplement to the standard positioner
version, there are several additional options
to extend the positioner functions.
Limit switches
To signalize the valves end positions in fail-
safe circuits, either two software limit swit-
ches or two proximity switches can be used.
Position transmitter
The position transmitter is an intrinsically
safe 2-wire transmitter controlled by the
microcontroller of the positioner. It serves to
assign the valve position with the 4 to 20
mA output signal. The position transmitter
signalizes both end positions, "valve closed"
or "valve fully open", as well as all inter-
mediate positions. Since the valve positions
are signalized to the positioner inde-
pendently of the input signal (minimum
current must be observed), the position
transmitter is a suitable option for checking
the current valve position.
10 EB 8380-1 EN
Design and principle of operation
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1.2 Communication
For communication, the positioner is
equipped with an interface for the HART®
protocol (Highway Addressable Remote
Transducer). Data transmission is accom-
plished by superimposing an FSK signal
(FSK = Frequency Shift Keying) over the
existing 4 to 20 mA signal lines for the refer-
ence variable.
You can configure and operate the posi-
tioner either via HART®-compatible, hand-
held communicator or via PC, using an FSK
modem and an RS-232 interface.
After mechanically resetting the positioner
to zero, it can be automatically started up
via initialization procedure. During this in-
itialization procedure, zero is automatically
adjusted, and the preset span is checked.
Fig. 2 ⋅Functional diagram
11 10
1
12
ep
3
4
2
51
G
μC
FSK
ep
G
μC
6
7
8
1 Inductive displacement sensor
2 Microcontroller
3 2/2 way valve for supply air
4 2/2 way valve for exhaust air
5 Microcontroller
6 Pressure regulator
7 Supply air 1.4 to 6 bar
8 Reference variable 4 to 20 mA
with superimposed FSK signal
10 Actuator stem
11 Lever
12 Clamp
EB 8380-1 EN 11
Design and principle of operation
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The positioner is supplied with a standard
configuration applying to a valve with
15 mm rated travel, which is designed for
integrated positioner attachment.
An individual configuration needed to
adapt the positioner to deviating actuators
can only be carried out by means of a com-
municator or a PC with a connected FSK
modem, using the HART® protocol.
You can enter the following parameters:
control characteristic, direction of action,
limitation of travel, travel range, transit time
to travel and fault messages.
Operating software
TROVIS-VI W
for devices with firmware K 2.11 or
higher, Data Sheet T 6661 N
IBIS
(DOS-based, no longer runs on
Windows 2000/M /XP/NT),
see B 8380-2 N for more details
DMT 1.2 and PACTware
Integration
e.g. Fisher AMS, Siemens PDM, etc.
Handheld communicator
DD-based handheld communicators,
e.g. Fisher-Rosemount HART® Communica-
tor.
12 EB 8380-1 EN
Design and principle of operation
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2. Attachment to the control valve
The positioner can be attached either di-
rectly to a SAMSON Type 3277 Actuator,
or according to Namur (I C 60534-6), to
control valves with cast yokes or rod-type
yokes.
In combination with an intermediate piece,
the device can also be attached as rotary
positioner to rotary actuators.
Since the standard positioner unit is de-
livered without accessories, the required
mounting parts and their order numbers
have to be derived from the tables.
Note!
For quick-acting control valves with a small
travel volume (transit time < 0.6 s), it might
be necessary to replace the filter installed in
the output pressure bore with a screw-in
throttle to obtain good control properties.
For further information, refer to sections
2.1, 2.2 and 2.3.
Caution!
The positioner does not have a venting
plug. Instead the air is e hausted via vent-
ing plugs on the mounting parts (see also
Fig. 3, 5 and 7).
A filter check valve for the e haust air is sup-
plied with every positioner (located under-
neath a transparent cover at the back of the
positioner). Use this filter check valve in
place of the standard venting plug included
in the accessories. The IP 65 degree of pro-
tection to prevent dirt and moisture entering
the device is only achieved when this filter
check valve is used.
EB 8380-1 EN 13
Attachment to the control valve
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2.1 Direct attachment to Type 3277
Actuator
For the selection of the required mounting
parts, refer to Tables 1, 2 and 3 page 17).
When looking at the signal pressure connec-
tion or the switchover plate (Fig. 3) from the
top, the positioner must be attached to the
left side of the actuator. The arrow on the
black case cover (Fig. 12) should then point
towards the diaphragm chamber.
Exception: Control valves in which the plug
closes the seat area when the actuator stem
retracts. In this case, the positioner has to
be attached to the right side of the yoke, i.e.
with the arrow pointing away from the dia-
phragm chamber).
1. First screw the clamp (1.2) to the actua-
tor stem. Make sure the fastening screw
is located in the groove of the actuator
stem.
2. Screw the associated lever D1 or D2 to
the transmission lever of the positioner.
3. Fasten distance plate (15) with seal to-
wards the actuator yoke.
4. Place positioner on the plate (15) so
that the lever D1 or D2 will slide centri-
cally over the pin of the clamp (1.2).
Then screw on to distance plate (15).
5. Attach cover (16).
Note!
For quick-acting control valves (transit time
< 0.6 s), it is necessary to replace the filter
installed in the output pressure bore (Output
38) with a screw-in throttle (accessories spe-
cified in Table 3).
Actuator with 240, 350 and 700 cm2
6. Check whether the tongue of the
seal (17) is aligned on the side of the
connection block such that the actuator
symbols for "Actuator stem extends" or
"Actuator stem retracts" match the actu-
ator design.
Otherwise, remove the three fixing
screws, remove the cover plate (18) and
reinsert the seal (17) turned by 180°.
When using an old connection block,
turn the switch plate (19) such that the
corresponding actuator symbol is
aligned with the arrow.
7. Place connection block with the associ-
ated sealing rings against the positioner
and the actuator yoke and screw it
tight, using the fastening screw.
For actuators with fail-safe action "actu-
ator stem retracts", additionally install
the ready-made signal pressure pipe
between the connection block and the
actuator.
Actuator with 120 cm2
With Type 3277-5 Actuator with 120 cm2
the signal pressure is transmitted via the
switchover plate to the diaphragm chamber.
For a rated travel of 7.5 mm, a brass
throttle has to be pressed into the seal lo-
cated in the signal pressure input on the ac-
tuator yoke. With 15 mm rated travel, this
is only required when the supply air press-
ure is higher than 4 bar.
6. Remove the vent plug on the back of the
positioner and close the side-located
signal pressure output (38) with the
plug from the accessory kit.
14 EB 8380-1 EN
Attachment to the control valve
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Actuator stem
retracts
Venting
"Actuator stem
retracts" symbol
With switch plate (formerly)
With seal (new)
SUPPLY
1817 19
1.2
D2
D1
17
16
15
1.2
16
17
15
Actuator stem retracts
Internal signal pressure connection Signal pressure
connection via piping
1.2 Clamp
D 1 Lever
D2 Lever
15 Distance plate
16 Cover
17 Seal
18 Cover plate
19 Switch plate
Signal pressure hole
Side view of connection block
Connection block
Mark
Mark
"Actuator stem
extends" symbol
Switchover plate
Switchover plate
Signal pressure input
Signal pressure
input, if necessary
with brass throttle
Actuator stem extends
Actuator stem
extends
Fig. 3 ⋅Attachment and signal pressure connection for Type 3277 (top) and Type 3277-5 with 120 cm (below)
EB 8380-1 EN 1
Attachment to the control valve
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7. Mount the positioner so that the hole in
the distance plate (15) matches the seal
located in the hole of the actuator yoke.
8. Align the switchover plate with the
corresponding symbol for left attach-
ment according to the marking and
screw tight onto the actuator yoke.
Important!
If, with the 120 cm2 actuator in addition to
the positioner, a solenoid valve or a similar
device is attached to the actuator, do not
remove the rear M3 screw. In this case, the
signal pressure has to be fed from the sig-
nal pressure output to the actuator via the
required connecting plate (see Table 2). The
switchover plate is not used.
Note!
For quick-acting control valves (transit time
< 0.6 s), it is necessary to replace the filter
installed in the output pressure bore (Output
38) with a screw-in throttle (accessories spe-
cified in Table 3).
Filling the spring chamber with air
If the spring chamber of the Type 3277 Ac-
tuator must be filled with the air exhausted
from the positioner, the spring chamber (ver-
sion "Actuator stem extends") can be con-
nected to the connection block by means of
a tube (see Table 3). To proceed, remove
the venting plug in the connection block.
In Type 3277-5 when "Actuator stem re-
tracts" the exhausted air from the positioner
is constantly applied to the spring chamber
through an internal hole.
16 EB 8380-1 EN
Attachment to the control valve
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1) Order with every pressure gauge kit: 2 restrictions (1790-6121)
1) 1402-0938 1402-0939
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2.2 Attachment according to
IEC 0534-
For the selection of the required mounting
parts, refer to Tables 4 and 5 page 21).
The positioner is attached according to
NAMUR using an adapter housing as
shown in Fig. 4. The valve travel is trans-
mitted via the lever (18) and the shaft (25)
to the bracket (28) of the adapter housing
and then to the pin (27a) located at the posi-
tioner lever.
To attach the positioner, the mounting parts
listed in Table 4 are required. Which lever
is to be used depends on the rated valve
travel.
Once the positioner is attached, however,
the arrow on the black case cover has to
point downwards away from the dia-
phragm actuator. (Exception: Control
valves in which the plug closes the seat area
when the actuator stem retracts. In this case,
the arrow has to point towards the dia-
phragm actuator).
Note!
For quick-acting control valves (transit time
< 0.6 s), it is necessary to replace the filter
installed in the output pressure bore (Output
38) with a screw-in throttle (accessories spe-
cified in Table 4).
2.2.1 Mounting sequence
NOTE
Before you mount the parts, load the actua-
tor with air pressure so that the valve is set
to 50 % of its travel. This will ensure the
e act alignment of the lever (18) and the
bracket (28).
Control valve with cast yoke
1. Use countersunk screws to screw the
plate (20) to the coupling which con-
nects the plug and actuator stem. With
2100 and 2800 cm2 actuators, use ad-
ditional mounting bracket (32).
2. Remove rubber plug from the adapter
housing and fasten the housing to the
NAMUR rib, using the hexagon head
screw.
Control valve with rod-type yoke
1. Screw plate (20) to the follower clamp
of the plug stem.
2. Screw studs (29) into the adapter hous-
ing.
3. Place the housing with the plate (30) on
either the right or left side of the valve
rod and screw the housing tight by
using nuts (31). While doing so, make
sure that lever (18) to be mounted sub-
sequently is horizontal (when the valve
is at midtravel).
4. Screw the pin in a hole in the center
row of holes in the plate (20) and lock it
such that it will be located above the
correct lever marking (1 to 2) for the as-
signed travel, see Table 5. Intermediate
values must be calculated. Beforehand,
18 EB 8380-1 EN
Attachment to the control valve
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2
1,5
1
2826
AB
24 25 22
32
31
20 19
19 21 2023 18
27b
27a
29
30
Mounting position
Fig. 4 ⋅Attachment according to IEC 60534-6 (NAMUR)
18 Lever N1, N2
19 Pin
20 Plate
21 Clamp
22 Clamping plate
23 Screw
24 Pointer
25 Shaft
26 Lever of positioner
27a Coupling pin
27b Lock nut
28 Bracket
29 Studs
30 Plate
31 Nuts
32 Mounting bracket
Attachment to
NAMUR rib
Attachment to rod-type yoke
EB 8380-1 EN 19
Attachment to the control valve
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move the clamp (21) to surround the
pin.
5. Measure the distance between the cen-
ter of the shaft (25) and the center of
the pin (19). You will be prompted for
this value subsequently during the con-
figuration of the positioner.
2.2.2 Presetting the valve travel
1. Adjust the shaft (25) in the adapter
housing so that the black pointer (24) is
aligned with the casted marking on the
adapter housing.
2. Screw tight clamping plate (22) in this
position, using a screw (23).
3. Screw in the pin (27) at the positioner
lever (26) and secure it with a hex nut
on the opposite side. Note the mount-
ing position A or B respectively accord-
ing to Table 5 and Fig. 5.
4. Put the positioner to the adapter hous-
ing such that the pin (27) will lie
properly within the arms of the bracket
(28).
To do so, insert a 2.5 mm Allen key or
a screwdriver from the front into the
hole located below the oblong hole on
the cover plate, and push the positioner
lever in the required position.
5. Screw the positioner to the adapter
housing.
6. Relieve the actuator from the signal
pressure.
20 EB 8380-1 EN
Attachment to the control valve
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