Samson 3780 series Mounting And Operating Instructions
Positioner with HART® communication
Type 3780
Mounting and
Operating Instructions
EB 8380-1 EN
Firmware R 2.22/K 2.23
Edition June 2004
Fig. 1 ⋅Type 378 0
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 IEC 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 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2.1 Switching amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2.2 Establishing 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
6. 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 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Contents
2
EB 8380-1 EN
9.3 Error messages during initialization without abortion . . . . . . . . . . . . 59
9.4 Error 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 experienced personnel familiar
with this product. According to these mounting and operating instructions, 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
experience as well as their knowledge of the relevant standards.
Explosion-protected versions of this device may only be operated by personnel who have undergone special training or instructions or who are authorized to work on explosion-protected
devices in hazardous areas. See section 6 for more details.
For devices in type of protection EEx 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 comply with the safety demands placed on serviced devices. Prior to
operation, they shall be tested according to paragraph 26 "Repairing explosion-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 restricted 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
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.
4
EB 8380-1 EN
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°
End position when w <..........1 %
End position when w >..........99 %
Rot ation al an gle r ange star t ..0°
Rot ation al an gle r ange 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
End position when w <..........1 %.....................................1 %
End 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
5
Modifications of positioner firmware
End position when w
</>
Changing the type of initialization from "maximum range" to
"nominal range" causes:
End position at < 1 % End position at > 125 %
Changing the type of initialization from "nominal range" to
"maximum range" causes:
End position at < 1 % End position at > 99 %
Extended
valve diagnostics
Supports TROVIS-EXPERT 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 EEPROM.
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 %
6
EB 8380-1 EN
Positioner versions
Former New
Communication
K 2.13 K 2.21
Supports all functions of R 2.21 as well as TROVIS-EXPERT in
version 1.0 or higher
Communication
K 2.21
K 2.22
Supports all functions of R 2.21 as well as TROVIS-VIEWin
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-EXPERT software.
Positioner versions
Model
3780 -
XXXXX
Explosion
protection
Without
Ex II 2 G EEx iA IIC T6 as per ATEX
CSA/FM
Ex II 3 G EEx nA II T6 as per ATEX
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
Positioner
Rated travel, adjustable Direct attachm. 5 to 30mm
Attachment acc. to IEC 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. cu rrent = 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)
Sign al pres su re (out pu t) 0 ba r t o p ressu re of supp ly ai r
Characteristic, adjustable Linear, equal percentage, reverse equal percentage, user-programmable
Deviation from characteristic ≤1 %
Dea d ban d Adj ustable f rom 0. 1 to 10 %, d efault 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
Effects Temperature: ≤0.15 %/10 K, supply: none, vibrations: none up to 250 Hz and 4 g
Explosion protection EEx ia IIC T6, see type examination certificate
Degree of protection IP 65 by using the filter check valve included
Electromagnetic
compatibility
Requirements stipulated in EN 61000-6-2, EN 61000-6-3 as well as NAMUR
Recommendation 21 have been met
Electrical connections 1 cable gland M20x1.5, black plastic;
other threaded hole M20x1.5 available
Fault alarm output For connection to switching amplifier acc. to EN 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
appr ox . 6 kΩ, at 24 V D C ( de pendin g o n volta ge ), swit ch ing poi nt
for "1" signal at ≥ 3 V, si gnal "0 " o nl y at 0 V, K
val ue 0.17; st at ic dest ru ction l im it 45 V
Technical data
8
EB 8380-1 EN
Communication
Hardware requirements SAMSONs TROVIS-VIEW Operator Interface (see Data Sheet T 6661 EN) or handheld
communicator, e.g. Type 275 by Rosemount
Integration of other operator interfaces, e.g. DTM, are available
Data transmission HART
®
Fiel d C om munica ti on Prot oc ol
Impedance in HART
®
frequency range: receive: 350 to 450 Ω; send: approx. 115
Ω
Accessory equipment
Inductive limit switches Two Type SJ 2 SN Prox. Switches for connection to switching amplifier acc. to EN 60947-5-6
Software limit switches Two configurable limit values for connection to switching amplifier acc. to EN 60947-5-6
Switching hysteresis 1%, static destruction limit 16 V
Analog position
transmitter
Two-wire transmitter, output 4 to 20 mA
Sup pl y: termin al vo ltage 12 to 35 V D C, stat ic de struct io n limit 40 V
Direction of action reversible, characteristic linear, operating range: 10 % to + 114 %
DC current signal ripple content: 0.6 % at 28 Hz/IEC 381 T1
Resolution ≤0.05 %
HF influence <2 % with f= 50 to 80 Mhz
Infl ue nce au x. su pply: n on e; temp er ature i nf luence : s ame as p os itione r
Materials
(num be rs acc or di ng to DIN )
Case Di e- cast al um inum, c hr om ed and pl astic- co at ed
External parts: stainless steel 1.4571 and 1.4301
Weight Approx. 1.3 kg
Versions
EB 8380-1 EN
9
1. Design and principle of operation
The positioner essentially consists of an inductive, non-contact travel measuring system and an electrically controlled valve
block comprising two 2/2-way on-off
valves and an electronic unit. This unit contains two microcontrollers for processing the
control algorithm and managing the communication.
Whenever a deviation between the actual
valve travel (actual value) and the reference
variable (set point) occurs, the microcontroller produces binary pulse-pause modulated
signals to control the two 2/2-way on-off
valves, each of which is assigned an amplifier. One of these valves controls the exhaust air, and the other one controls the supply 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 actuator to the atmosphere (venting). These onoff valves can either have the switching
states - permanently open, permanently
closed - or generate single pulses of changing widths. With the two valves being controlled, 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 EN 60947-5-6) used to
signalize a fault to the control room.
Activating the write protection switch located in the hinged cover prevents the positioner 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 voltage 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 deactivated 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 valves end positions in failsafe circuits, either two software limit switches 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 intermediate positions. Since the valve positions
are signalized to the positioner independently 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
1.2 Communication
For communication, the positioner is
equipped with an interface for the HART
®
protocol (Highway Addressable Remote
Transducer). Data transmission is accomplished by superimposing an FSK signal
(FSK = Frequency Shift Keying) over the
existing 4 to 20 mA signal lines for the reference variable.
You can configure and operate the positioner either via HART
®
-compatible, handheld 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 initialization procedure, zero is automatically
adjusted, and the preset span is checked.
Fig. 2 ⋅Functional diagram
11 10
1
12
e
p
3
4
2
5
1
G
μC
FSK
e
p
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
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 communicator 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-VIEW
for devices with firmware K 2.11 or
higher, Data Sheet T 6661 EN
IBIS
(DOS-based, no longer runs on
Windows 2000/ME/XP/NT),
see EB 8380-2 EN 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
2. Attachment to the control valve
The positioner can be attached either directly to a SAMSON Type 3277 Actuator,
or according to Namur (IEC 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 delivered 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 exhausted via venting plugs on the mounting parts (see also
Fig. 3, 5 and 7).
A filter check valve for the exhaust air is supplied with every positioner (located underneath 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 protection 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
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 connection 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 diaphragm 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 centrically 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 specified in Table 3).
Actuator with 240, 350 and 700 cm
2
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 actuator 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 associated sealing rings against the positioner
and the actuator yoke and screw it
tight, using the fastening screw.
For actuators with fail-safe action "actuator stem retracts", additionally install
the ready-made signal pressure pipe
between the connection block and the
actuator.
Actuator with 120 cm
2
With Type 3277-5 Actuator with 120 cm
2
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 located in the signal pressure input on the actuator yoke. With 15 mm rated travel, this
is only required when the supply air pressure 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
Actuator stem
retracts
Ventin g
"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
15
Attachment to the control valve
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 attachment according to the marking and
screw tight onto the actuator yoke.
Important!
If, with the 120 cm
2
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 signal 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 specified in Table 3).
Filling the spring chamber with air
If the spring chamber of the Type 3277 Actuator must be filled with the air exhausted
from the positioner, the spring chamber (version "Actuator stem extends") can be connected 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 retracts" 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
1)
Order with every pressure gauge kit: 2 restrictions (1790-6121)
1)
1402-0938 1402-0939
2.2 Attachment according to
IEC 60534-6
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 transmitted 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 positioner 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 specified in Table 4).
2.2.1 Mounting sequence
NOTE
Before you mount the parts, load the actuator with air pressure so that the valve is set
to 50 % of its travel. This will ensure the
exact 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 connects the plug and actuator stem. With
2100 and 2800 cm
2
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 housing.
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 subsequently 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 assigned travel, see Table 5. Intermediate
values must be calculated. Beforehand,
18
EB 8380-1 EN
Attachment to the control valve
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
move the clamp (21) to surround the
pin.
5. Measure the distance between the center of the shaft (25) and the center of
the pin (19). You will be prompted for
this value subsequently during the configuration 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 mounting position A or B respectively according to Table 5 and Fig. 5.
4. Put the positioner to the adapter housing 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
Ta bl e 4
Attachment acc. to IEC 60534-6 Control valve Travel in mm With lever Order no.
NAMUR mounting kit
Parts illustrated in Fig.4
Valve with cast yoke
7.5 to 60 N1 (125 mm) 1400-6787
30 to 120 N2 (212 mm) 1400-6789
Valve with
rod-type yoke
with
rod diameter
in mm
20 to 25 N1 1400-6436
20 to 25 N2 1400-6437
25 to 30 N1 1400-6438
25 to 30 N2 1400-6439
30 to 35 N1 1400-6440
30 to 35 N2 1400-6441
Attac hm ent to F is he r and M as on eilan l inear a ct uators (o ne each of bo th mo unting ki ts is needed per one
actuator)
1400-6771
and
1400-6787
Accessories
Order no.
Pre ss ure gau ge mo unting bl ock G 1/4
1/4 N PT
1400-7458
1400-7459
Pre ss ure gau ge set St. s t. /Brass
St. st./St. st.
1400-6957
1400-6958
Signal pressure throttles (screw-in type and brass throttle) 1400-6964
Filter check valve, replaces venting plug and increases the degree of protection to IP 65
(one in cluded wi th the d el ivere d p os itione r)
1790-7408
Table 5
Attachment according to IEC 60534-6
Travel in mm *) 7.51515303060306060120
Pin on marking *) 1 12121212
Corresp. distance pin/lever fulcrum 42 428442848416884168
With lever N1 (125 mm in length) N2 (212 mm in length)
Transmission pin (27) on position A A B A B
*) Deviating travel values (intermediate values) must be calculated accordingly.
EB 8380-1 EN
21
Attachment to the control valve
2.3 Attachment to rotary actuators
For the selection of the required mounting
parts, refer to Table 6 (page 25).
The positioner can also be attached to rotary actuators in accordance with VDI/VDE
3845 by using the mounting parts and accessories listed in Table 6. In this arrangement, the actuators rotary motion is converted via the cam disk on the actuator shaft
and the feeler roll of the positioner lever to
a linear motion required by the positioners
inductive displacement sensor system.
Each cam disk is suitable for two characteristics, i.e. for the ranges of angle of rotation from 0 to 90° (recommended for
angles below 90°) and 0 to 120° (recommended for 90° and greater).
For double-acting, springless rotary actuators, it is necessary that a reversing amplifier be attached to the positioner on the side
of the connection. (See section 2.3.4.)
If the positioner is attached to a SAMSON
Type 3278 Rotary Actuator, the air exhausted from the positioner is admitted to
the inside of the actuator and the chamber
behind the diaphragm. No additional piping is required.
If the positioner is attached to actuators of
other manufacturers (NAMUR) the air is applied to the chamber behind the diaphragm
through a tube assembly and a tee, connected between actuator and intermediate
piece.
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 6).
2.3.1 Mounting the cam follower
roll lever
1. Place lever with the attached roll (35)
on the side of the transmission lever
(37) and secure it with the enclosed
screws (38) and washers.
2.3.2 Mounting the intermediate
piece
SAMSON Type 3278 Actuator:
1. Screw adapter (36) to the free end of the
rotary actuator shaft with two screws.
2. Place the intermediate piece (34) on the
actuator case and fasten with two
screws. Align intermediate piece of the
positioner so that the air connections of
the positioner will face towards the diaphragm case side.
Actuators according to VDI/VDE 3845
1. Place the complete intermediate piece
(34, 44, 45 and 42) onto the mounting
bracket included in the delivery (fixing
level 1 VDI/VDE 3845) and screw tight.
2. Align the cam disk (40) and scale (39) as
described in section 2.3.3 and fasten tight.
With springless actuators, the reversing amplifier must be screwed to the side of the positioner case. See section 2.3.4 for more details.
22
EB 8380-1 EN
Attachment to the control valve
Fig. 5 ⋅Attachment to rotary actuators
33
3835
39
39
40
34
36
40
34
44
45
42
43
37
Attachment to SAMSON Type 3278
Attachment acc. to
VDI/VDE 3845
Vent plug or filter
check valve
33 Positioner
34 Intermediate piece
35 Lever w. cam follower roll
36 Adapter
37 Transmission lever
38 Screws
39 Scale
40 Cam disk
41 Actuator shaft
42 Plate
43 Bracket
44 Coupling
45 Seal
EB 8380-1 EN
23
Attachment to the control valve
Loading...