Foxboro Analog Positioner SRI990

Foxboro Analog Positioner SRI990
Master Instruction
10.2007
MI EVE0107 A-(en)
SRI990 Analog Positioner
SRI990-T Electrical Position Transmitter
The analog Positioner SRI990 with analog input 4 to 20 mA is designed to operate pneumatic valve actuators. It
offers easy adjustment by means of switches and potentiometers. The modular structure of the POSYS positioner
series enables conversion from an analog to a “intelligent” positioner by easy exchanging the electronics.
In version “Electrical Position Transmitter” SRI990-T the device includes the option Position Transmitter but no controller and no pneumatic components. The positon of actuator is given as 4-20 mA output signal.
FEATURES
• Configuration by means of switches and potentio•
•
•
•
•
•
•
•
•
•
meters
Load 300 W
Low air consumption
Stroke 8 to 260 mm (0.3 to 10.2 inches)
Angle range up to 95 degree
Supply air pressure up to 6 bar (90 psig),
with spool valve up to 7 bar (105 psig)
Single acting or double acting
Mechanical travel indicator
Position transmitter 4 - 20 mA as option
Attachment to stroke actuators directly or
according to IEC 534 part 6 (NAMUR)
Attachment to rotary actuators according to
VDI/VDE 3845
• Protection class IP 65 (IP 66 on request) and
NEMA 4X
• Explosion protection:
II 2 G EEx ia IIC T6 according to ATEX
or “Intrinsic Safety” according to FM
Additional equipment (compatible with SRD991):
• Integrated inductive limit switches, independent of
device electronics
Accessories (compatible with SRD991):
• Gauge attachment for supply air and outputs
• Booster relay
• SRI990 can be upgraded to a SRD991 by exchan-
Repair and maintenance operations must be carried out by qualified personnel!
ge of the electronic motherboard
2
SRI990
MI EVE0107 A-(en)
TABLE OF CONTENTS
CHAP: CONTENT
PAGE
CHAP: CONTENT
PAGE
1
METHOD OF OPERATION . . . . . . . . . . . . 3
9
DECOMMISSIONING . . . . . . . . . . . . . . . 22
1.1
1.2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . 3
10
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . 23
1.3
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4
Safety Requirements . . . . . . . . . . . . . . . . . 4
11
11.1
MAINTENANCE . . . . . . . . . . . . . . . . . . . 24
General . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2
LABELS . . . . . . . . . . . . . . . . . . . . . . . . . . 5
11.2
Supply filter replacement . . . . . . . . . . . . . 24
11.3
Removal of the electronics unit . . . . . . . . . 24
3
3.1
DESIGN. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pneumatic accessories . . . . . . . . . . . . . . . 7
4
MOUNTING TO LINEAR ACTUATORS . . 8
4.1
4.2
4.3
NAMUR Mounting (left hand) . . . . . . . . . . . 8
NAMUR Mounting (right hand) . . . . . . . . . 10
Direct Mounting . . . . . . . . . . . . . . . . . . . . 12
5
MOUNTING TO ROTARY ACTUATORS. 14
6
PNEUMATIC CONNECTIONS. . . . . . . . . 16
7
ELECTRICAL CONNECTION . . . . . . . . . 17
8
START-UP . . . . . . . . . . . . . . . . . . . . . . . 18
8.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Setting of -
8.2
8.3
- Direction of rotation of feedback shaft . . . 19
- Input Signal Range. . . . . . . . . . . . . . . . . 20
- Split Range . . . . . . . . . . . . . . . . . . . . . . 20
8.4
8.5
8.6
- Gain (G) . . . . . . . . . . . . . . . . . . . . . . . . 21
- Zero (ZERO) and Span (S). . . . . . . . . . . 21
- Damping (D) . . . . . . . . . . . . . . . . . . . . . 21
8.7
8.8
- Travel indicator. . . . . . . . . . . . . . . . . . . . 21
Start-up of Position Transmitter (4-20mA)
for transmitter SRI990-xlQxxx. . . . . . . . . . 22
8.9
8.10
Basic adjustment of electronics. . . . . . . . . 22
Pneumatic test . . . . . . . . . . . . . . . . . . . . . 22
11.3.1 Conversion of positioner . . . . . . . . . . . . . . 24
11.4
Replacement of mechanical and
pneumatic units . . . . . . . . . . . . . . . . . . . . 25
11.4.1 Amplifier replacement. . . . . . . . . . . . . . . 25
11.4.2
Preamplifier replacement . . . . . . . . . . . . 25
11.4.3
11.4.4
IP-module replacement . . . . . . . . . . . . . 25
Feedback unit replacement . . . . . . . . . . 25
12
OPTION “Limit switch” . . . . . . . . . . . . . 26
APPENDIX
13
SYSTEM CONFIGURATION . . . . . . . . . . 27
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . 28
MI EVE0107 A-(en)
SRI990
1
METHOD OF OPERATION
1.1
General
3
y
The intelligent positioner SRI990 1 and the pneumatic actuator 2 form a control loop with the setpoint value w (from
master controller or control system), the output pressure y
and the position x of the actuator on valve 3.
The positioner can be attached to both linear actuators and
rotary actuators.
Actuators with spring force are controlled by a single acting
positioner. Actuators without a spring force are controlled by
a double acting positioner. The positioner can be operated
by means of switches and potentiometers.
2
w
x
1
3
For the supply air, we recommend the FOXBORO
ECKARDT FRS923 filter regulator.
1.2
Block diagram
D
P5
9
4-20
mA
Ps
G
P4
Imax
y1
I
10
11
19
13
17
12
18
14
15
16
S3
S4-S7
1.3
y2
P
S8
ZERO
P3
S
P2
P1
22
S1 S2
(R / L)
JCE
Operation
The supply of the electronics unit is diverted from the current signal 4 to 20 mA at the input.
The current value is measured and is suited in input circuit
9 to the desired input range (control action or split range)
via switches S4 - S7. In circuit 10 the signal is provided
with an adjustable time constant setable via potentiometer
P5.
The resulting internal signal is guided to the analog control
circuit 11 , the gain of which is adjustable via potentiometer
P4. The output of the control circuit drives the electromechanic converter (IP module) 12 , which controls the
analog single acting or double acting pneumatic amplifier
14 through the preampifier 13. The output of the amplifier
14 is the output pressure y (y1,y2) to the actuator. The
pneumatic amplifiers are supplied with supply air Ps 1.4 to
6 bar (20 to 90 psig).
The position x of the actuator is measured by the position
sensor (conductive plastic potentiometer) 15 . The desired
direction of rotation is set in 17 via switches S1 and S2.
The SPAN is suited to the stroke / rotation angle range via
potentiometer P2, while ZERO is set in 19 via potentiometer P3. With switch S3, potentiometer P1 provides an
internal zero adjustment in 18, carried out by the manufacturer (service function). The resulting feedback signal is
guided to control circuit 11 .
The IP module receives its maximum drive current via
switch S8, enabling checking of the function of the pneumatic unit.
The position x of the actuator is independently displayed by
the mechanical travel indicator 16 .
The mechanical limit switch 22 (optional) enables independent alarm signals.
4
1.4
SRI990
MI EVE0107 A-(en)
Safety requirements
Accident prevention
Explosion protection
This device complies with regulations for the prevention of
accidents Power-Driven Work Aids (VGB 5) of 1st
October 1985.
(Only if ordered)
In option “limit switch” do not touch control vane during
operation - danger of injuries!
Electrical safety
This instrument satisfies the conditions for safety class III,
overvoltage category I according to EN 61010-1 or
IEC1010-1.
Any work on electrical parts must be done by qualified personal.
The instrument must be used for its designated purpose
and connected in accordance with its connection diagram
(see pages 17 and 27).
Locally applicable installation regulations for electrical
equipment must be observed, e.g. in the Federal Republic
of Germany DIN VDE 0100 resp. DIN VDE 0800. The
instrument contains no built-in fuses.
Technical data for explosion protection see Product Specifications Sheet PSS EVE0107 A-(en).
For installations located in explosive atmospheres, all relevant national regulations and installation conditions must be
observed, e.g. in the Federal Republic of Germany ElexV
and DIN VDE 0165.
Attention:
When repairing explosion-protected equipment, observe
the national regulations.
Repairs involving parts must be manufacturer’s original
parts.
The following applies to the Federal Republic of Germany:
Repairs involving parts required for explosion protection
must either be carried out by the manufacturer or by authorized personnel and confirmed by certificate.
EMC and CE
The instrument must be operated with safe, extra low
voltage-SELV or SELV-E.
For notes regarding Electromagnetic compatibility EMC and
CE labels see Product Specifications Sheet PSS EVE0107
A-(en).
Safety precautions taken with the instrument may be
rendered ineffective if the instrument is not operated in
accord- ance with the Master Instructions.
In order to ensure EMC protection, the electronic board
must be screwed to the housing.
Limitation of power supplies for fire protection must be observed in accordance with EN 61010-1, appendix F or IEC
1010-1.
MI EVE0107 A-(en)
2
5
SRI990
LABELS
B
C
A
A Nameplate
B Additional label for options
C Imprinted references regarding settings
Nameplate A (Example)
Classified intr. safe by ATEX
Type of protection “EEx ia”
Nameplate A (Example)
Without Ex-protection
R E V .
Z U L U F T / S U P P L Y : m a x .
X
E IN F A C H
E IN G A N G
/ IN P U T
6
/ 9 0
b a r / p s i
D O P P E L T / D O U B L E
/ S IN G L E
4 ...2 0 m
A
T u
-4 0 ° C ... + 8 0 ° C
M a d e in F r a n c e b y E c k a r d t S A S , F - 6 8 3 6 0 S o u ltz
S R I9 9 0 -B IQ S 7 Z Z Z
Z U S Ä T Z L IC H E E IN - / A U S G Ä N G E
A D D IT IO N A L IN P U T S / O U T P U T S
Z U L U F T / S U P P L Y : m a x .
X
E
S
L E
R
L L U
.X M
M M
M IN
3 1
E IN F A C H
E IN G A N G
M F
T R
E
A L
6
/ IN P U T
/ 9 0
b a r / p s i
D O P P E L T / D O U B L E
/ S IN G L E
4 ...2 0 m
A
0 1 0 2
P T B
3 2
0 2 A T E X 2 2 0 6
II 2 G
U
U o p = 1 2 ...3 2 V
i
I
E E x
i
T Y P E A I 6 3 6
ia /ib IIB / IIC
P i
C
i
L i
T 4 / T 6
T u
T u m a x .
m in .
s ie h e B e tr ie b s a n le itu n g /s e e In s tr u c tio n M a n u a l
(3 )
SRI990
SER.No
ECEP
1 .3
S R I9 9 0 -B IQ S 7 E A A
S T E L L . U M F O R M E R
P O S . T R A N S M IT T E R
S T
P O
K
T E
R E V .
E C K A R D T S A S
1 .3
M a d e in F r a n c e b y E c k a r d t S A S , F - 6 8 3 6 0 S o u ltz
E C K A R D T S A S
Z U S Ä T Z L IC H E E IN - / A U S G Ä N G E
A D D IT IO N A L IN P U T S / O U T P U T S
S T E L L . U M F O R M E R
P O S . T R A N S M IT T E R
S T
P O
K
T E
E
S
L E
R
3 1
L L U
.X M
M M
M IN
M F
T R
E
A L
3 2
(4 )
[ Device specification, Model Code ]
[ Serial number ]
[ Number for special engineered version ]
Additional label A FM (Example)
Additional label B option “Limit switches” (Example)
Z U S Ä T Z L IC H E E IN - / A U S G Ä N G E
A D D IT IO N A L IN P U T S / O U T P U T S
E N T R E E S / S O R T IE S A D D IT IO N E L L E S
S E R .N o
S IN
I.S . C L
W A R N
A V E R T
G L E / S IM P L E
I, II, III D IV 1 , G
IN G :
S U
IS S E M E N T : L A
S E
N .I. C L I, II, III, D IV 2 , G
D O
W A R N IN G :
S W
A V E R T IS S E M E N T : N E
C O
R E V .
p s i
D O U B L E
P A -G ; F O R /P O U R : F
B S T IT U T IO N O F C O
S U B S T IT U T IO N D E
C U R IT E IN T R IN S E Q
P A -D , F , G
N O T D IS C O N N E C T
IT C H E D O F F O R T H
P A S D E B R A N C H E R
U P E E D U L A Z O N E
b a r
M o d e lC o d e : x x x U x x
E C E P
G R E N Z W E R T G E B E R
(IN D U K T IV E K O N T A K T E )
M S E E /V O IR 5 5 6 1 4 5 0 1 6
M P O N E N T S M A Y IM P A IR IN T R IN S IC S A F E T Y
C O M P O S A N T S P E U T C O M P R O M E T T R E L A
U E
E Q U IP
E A R E
L 'A P P
S O IT C
M E N
A IS
A R E
O N N
T U N
K N O
IL A
U E C
L E
W N
M O
O M
S S
T
IN
M
O
P O
B
S Q
E N
W E
E N
U E
O N
R H
O N
L A
-D A
M A X .A M B ./A M B .M A X .: T 4 a t/à + 8 0 ° C /1 7 6 ° F ; T 6 a t/à + 4 0 ° C /1 0 4 ° F
N E M A T Y P E / T Y P E :
4 X
A S B
-H A Z
P U IS
N G E
M a d e in F r a n c e b y E c k a r d t S A S , F -6 8 3 6 0 S o u ltz
Measurement point label (Example)
Directly fixed or attached
XXX 09/16
E E
A R
S A
R E
N
D O U S .
N C E A IT E T E
U S E .
L IM IT S W IT C H
(IN D U C T IV E C O N T A C T S )
5 3 5 8 7 3 0 3 1 (0 )
S U P P L Y / A L IM : M A X .
V A L E U R S L IM IT E S
(C A P T E U R S IN D U C T IF S )
S IC
A U S
S E C U R
V E R S IO
4 1
L S 1
V L 1
4 2
H E
F Ü
IT Y
N
R H
H R
-V
S E
E IT
U N
E R
C U
5 1
S G
S IO N
R IT E
L S 2
V L 2
5 2
5 5 6 7 2 9 1 0 8
(2 )
6
3
SRI990
MI EVE0107 A-(en)
DESIGN
8
1 0
2 1
3
2 3
2
1 a
1 b
4
2
9
1 1
2 6
2 2
4
5
6
1 2
7
1 9
1 5
2 0
1a
1b
2
3
4
5
6
7
8
9
10
2 8
Adapter, eg. 1/2"-14NPT
Cable gland
Plug, interchangeable with Pos. 1
Screw terminals (11 + / 12 –) for input (w)
I– for current measurement (see also Item 23 )
Ground connection
Female thread G 1/4 for output I (y / y1)
Female thread G 1/4 for air supply (s)
Female thread G 1/4 for output II (y2)
Direct attachment hole for output I (y1)
Feedback shaft
Connection manifold for attachment to stroke actuators
11
12
15
19
20
21
22
23
26
27
28
Connection base for attachment to rotary actuators
Travel indicator
Main board version “with Position Feedback”
Fixing shaft for limit switch
Cover with window to 12
Air vent, dust and water protected
Data label
Tip jacks for current measurement, Æ 2 mm
(integrated in teminals)
Arrow is perpendicular to shaft 9 at angle 0 degree
Check valve (at type of protection NEMA 4X)
High cover with built-in limit switches
MI EVE0107 A-(en)
3.1
7
SRI990
When mounting, check the proper seating of the O-rings
and bolt on the accessories with the two M8 bolts. Unused
outputs are closed by means of plastic plugs.
Pneumatic Accessories
3 x
G 1 /4
L x B x H =
1 1 0 ,5 x 3 9 x 8 1 m m
y (y 1 )
s
(y 2 )
L
B
2 x
1 /4 -1 8 N P T
H
y
L x B x H =
1 0 1 ,5 x 6 0 x 1 0 0 ,5 m m
C o d e L E X G
C o n n e c tio n m
s in g le a c tin g
w ith p r e s s u r e
s u p p ly a ir s a
s
-J (
a n
p o s
g a
n d
-J 1 fo r G 1 /4 )
ifo ld fo r
itio n e r
u g e s fo r
o u tp u t y
2 x
1 /4 -1 8 N P T
L x B x H =
1 2 1 x 3 9 x 8 1 m m
y
s
C o
(-F
B o
a c
d e L E X
1 fo r G
o s te r fo
tin g p o s
G
1 /4
r s
itio
-F
)
in g le
n e r
3 x
1 /4 -1 8 N P T
y 1
L x B x H =
1 0 1 ,5 x 6 0 x 1 0 0 ,5 m m
3 x
1 /4 -1 8 N P T
y 2
3 x G 1 /8
G a u g e *
-M
a n
p o
g a
y 1
(-M 1 fo r G 1 /4 )
ifo ld fo r
s itio n e r
u g e s fo r s u p p ly
a n d y 2
fo r
L x B x H =
1 0 0 x 3 0 x 4 5 m m
y 1
s
C o
(-G
B o
a c
y 2
C o d e L E X G
C o n n e c tio n m
d o u b le a c tin g
w ith p r e s s u r e
a ir s , o u tp u ts
s
d e L E X
1 fo r G
o s te r fo
tin g p o s
3 x
G
-G
1 /4 )
r d o u b le
itio n e r
1 /4 -1 8 N P T
y (y 1 )
s
(y 2 )
L x B x H =
1 0 1 ,5 x 6 5 x 1 0 6 ,5 m m
C o d e L E X G -N (-N 1
C o n n e c tio n m a n ifo ld
d o u b le a c tin g p o s itio
w ith th r e a d s G 1 /8 fo
fo r s u p p ly a ir s , o u tp
( s u p p lie d w ith o u t p r e
fo r G 1 /4 )
fo r s in g le
n e r
r p re s s u re
u ts y (y 1 ) a
s s u re g a u
o r
g a u g e s
n d (y 2 )
g e s )
L x B x H =
8 3 x 2 0 x 2 5 m m
3 x
1 /4 -1 8 N P T
2 x
1 /2 -1 4 N P T
y (y 1 )
s
s
y
C o d e L E X G
B o o s te r fo r s
a c tin g p o s itio
w ith d o u b le d
-H
in g
n e
o u
(-H 1 fo r G 1 /4 )
le
r
tp u t c a p a c ity
C o d e L E X G -L (-K fo r G 1 /4 )
C o n n e c tio n m a n ifo ld
(y 2 )
U n u s e d th r e a d s fo r p r e s s u r e g a u g e s a r e c lo s e d
b y m e a n s o f lo c k s c r e w P a r t N o . 4 2 5 0 2 4 0 1 3 .
8
4
SRI990
MOUNTING TO LINEAR ACTUTAORS
4.1
NAMUR Mounting - left hand -
Applicable to actuators with cast yoke or pillar yoke acc. to
NAMUR (DIN IEC 534-6).
Mounting the positioner with pneumatic connections on the
left side and electrical connections on the lower right side.
MI EVE0107 A-(en)
4.1.2 Preparation of the actuator
Screw the carrier bolt to the stem connector (see page 9)
and lock it by means of a counter nut.
A carrier bolt with an adjustable length is used to be able to
screw on various coupling pieces.
H
S
K
M 6
It consists of a stud S, which is screwed into the coupling
piece K (with 3 mm Allen key) and locked with a lock nut
M6. The threaded sleeve H is screwed onto it and locked
with a lock nut M6. Make sure that the bolt is adjusted to
the right length!
Fasten the mounting bracket to the left side of the yoke.
For a cast yoke use a screw M8 x 30,
for a pillar yoke use two U-bolts and four nuts.
Attachment of the positioner to the actuator is made to the
left using the mounting bracket and feedback lever for a
NAMUR mount. Use:
attachment kit EBZG -H for a cast yoke, or
attachment kit EBZG -K for a pillar yoke.
4.1.3 Mounting of the positioner
Fasten the positioner to the mounting bracket using two
spring washers and two screws M8 x 80.
Note, the carrier bolt B is in the slot of the feedback lever
A and the compensating spring F touches the carrier bolt.
· The side outputs I (or I and II, see page 6) are used.
B
The rear output I is closed by means of a lock screw
522 588 013.
Pneumatic connections: Do not use Teflon tape for sealant. The fine fibres could disturb the function of the SRI990.
Use only Loctite® #243 for sealant 1).
Screw-type glands for electrical connections are positioned
on the lower or right side. Any unused threaded holes are
closed by plugs.
When putting on the housing cover note that the air vent
should face-down (see illustration above).
4.1.1 Preparation of the positioner
Rotate the shaft stub of shaft 9 so that the flat on the shaft
stub is perpendicular to the arrow 26 on the housing (detail
see page 13), at mid travel range. Fasten the feedback
lever A to the shaft by means of spring washer and nut M8.
F
A
Fig.: Feedback lever
For optimum utilization of the positioner operating range, it
is recommended that the arrangement is adjusted according to the following procedure before fixing. At an actuator
position in the middle of travel range, the feedback lever position should be perpendicular to the actuator stem and the
angle range should be between -10° ... +10° and -30° ...
+30°.
Procedure:
Set the actuator to the middle of its travel range by supplying it with an independent pressure. Fasten the mounting
bracket so that carrier bolt and the mark on mounting
bracket are about the same distance from the valve body.
Fasten the positioner to the mounting bracket so that a
suitable angle range is selected.
It is recommended that the pneumatic and electrical connections are made after adjusting the position.
1)
Apply only to male thread
MI EVE0107 A-(en)
9
SRI990
4.1.4 NAMUR Mounting Dimensions – left hand –
m m
in
3 5 ... 9 0
1 .3 8 ... 3 .5 4
M o u n tin g b r a c k e t
4 3
1 .6 9
9
.3 5
4 x
3 x
9
.3 5
1 3 ,5
.5 3
6 2
2 .4 4
A tta c h m e n t to p illa r y o k e
( w ith a tta c h m e n t k it
C o d e E B Z G -K )
2 0
.7 9
1 5
.5 9
3 2
1 .2 6
7 3 ,5
2 .8 9
6 x M 8
1 2 ,5
.4 9
4 3
1 .6 9
6 7
2 .6 4
3 8 ,5
1 .5 2
A tta c h m e n t to c a s tin g y o k e
( w ith a tta c h m e n t k it
C o d e E B Z G -H )
6 7 ,5
2 .6 6
3 5 ... 9 0
1 .3 8 ... 3 .5 4
2 0 ... 3 5
.7 9 ... 1 .3 8
6 7
2 .6 4
2 p ie c e s
F e e d b a c k le v e r
C o d e E B Z G -A fo r 8 ..7 0 m m
tra v e l
6 7
2 .6 4
8
.3 2
3 2
1 .2 6
1 8 ... 3 0
.7 1 ... 1 .1 8
1 9
.7 5
F e e d b a c k le v e r
8 3
3 .2 7
C o d e E B Z G -B fo r 6 0 ..1 2 0 m m
6 7
2 .6 4
8
.3 2
fo r c o n n e c tio n to v a lv e s te m
7 ,8
.3 1
C a r r ie r b o lt
tra v e l
10
4.2
SRI990
MI EVE0107 A-(en)
NAMUR Mounting - right hand -
Right-hand mounting is done if for instance left-hand mounting is not possible for structural reasons. Applicable to
actuators with cast yoke or pillar yoke acc. to NAMUR (DIN
IEC 534-6).
Mounting the positioner with pneumatic connections on the
right side and electrical connections on the left side.
4.2.2 Preparation of the actuator
Screw the carrier bolt to the stem connector (see page 9)
and lock it by means of a counter nut. A carrier bolt with an
adjustable length is used to be able to screw on various
coupling pieces.
H
S
K
M 6
It consists of a stud S, which is screwed into the coupling
piece K (with 3 mm Allen key) and locked with a lock nut
M6. The threaded sleeve H is screwed onto it and locked
with a lock nut M6. Make sure that the bolt is adjusted to
the right length!
Fasten the mounting bracket to the left side of the yoke.
For a cast yoke use a screw M8 x 30, for a pillar yoke use
two U-bolts and four nuts.
Attachment of the positioner to the actuator is made to the
right using the mounting bracket and feedback lever for a
NAMUR mount. Use:
attachment kit EBZG -H for a cast yoke, or
attachment kit EBZG -K for a pillar yoke.
· The side outputs I (or I and II, see page 6) are used.
4.1.3 Mounting of the positioner
Fasten the positioner to the mounting bracket using two
spring washers and two screws M8 x 80.
Note, the carrier bolt B is in the slot of the feedback lever
A and the compensating spring F touches the carrier bolt.
B
The rear output I is closed by means of a lock screw
522 588 013.
F
A
Pneumatic connections: Do not use Teflon tape for sealant. The fine fibres could disturb the function of the SRI990.
Use only Loctite® #243 for sealant 1).
Screw-type glands for electrical connections are positioned
on the left side. Any unused threaded holes are closed by
plugs.
When putting on the housing cover note that the air vent
should face-down (see illustration above).
4.2.1 Preparation of the positioner
Rotate the shaft stub of shaft 9 so that the flat on the shaft
stub is perpendicular to the arrow 26 on the housing (detail
see page 13), at mid travel range. Fasten the feedback
lever A to the shaft by means of spring washer and nut M8.
Fig.: Feedback lever
For optimum utilization of the positioner operating range, it
is recommended that the arrangement is adjusted according to the following procedure before fixing. At an actuator
position in the middle of travel range, the feedback lever
position should be perpendicular to the actuator stem and
the angle range should be between -10° ... +10° and -30°
... +30° .
Procedure:
Set the actuator to the middle of its travel range by supplying it with an independent pressure. Fasten the mounting
bracket so that carrier bolt and the mark on mounting
bracket are about the same distance from the valve body.
Fasten the positioner to the mounting bracket so that a
suitable angle range is selected.
It is recommended that the pneumatic and electrical connections are made after adjusting the position.
M 8
1)
Apply only to male thread
9
2 6
A
MI EVE0107 A-(en)
SRI990
4.2.4 NAMUR Mounting Dimensions – right hand –
*
m m
in
3 5 ... 9 0
1 .3 8 ... 3 .5 4
6 7
2 .6 4
A tta c h m e n t to c a s tin g y o k e
( w ith a tta c h m e n t k it E B Z G - H )
Mounting bracket, feedback lever and
carrier bolt see page 9
3 5 ... 9 0
1 .3 8 ... 3 .5 4
2 p ie c e s
2 0 ... 3 5
.7 9 ... 1 .3 8
6 7
2 .6 4
A tta c h m e n t to p illa r y o k e
( w ith a tta c h m e n t k it E B Z G - K )
11
12
4.3
SRI990
MI EVE0107 A-(en)
Direct Mounting
Actuators with appropriately prepared yoke (PA200,
PA350) enable mounting of the SRI990 direcly to the
actuator yoke.
4.3.1 Preparation of the positioner
Rotate the shaft stub of shaft 9 so that the flat on the shaft
stub is perpendicular to the arrow 26 on the housing (detail
see page 13), at mid travel range. Fasten the feedback
lever A to the shaft by means of spring washer and nut M8.
D
2 6
The attachment of the positioner is accomplished by bolting
it directly to the actuator yoke using the feedback lever for a
direct mount (with attachment kit EBZG -D).
The rear output I and the side outputs I and II are used as
follows (see page 6) :
· Actuator single acting, spring force closes:
The rear output I is used (remove lock screw in hole D ).
The side output I is closed by means of a lock screw
522 588 013.
A
M 8
9
4.3.2 Preparation of the actuator
Screw in the carrier bolt B on the coupling piece K on the
drive spindle S at the lower left and lock it by means of a
nut M6.
R
· Actuator single acting, spring force opens:
The side output I is used.
The rear output I is closed by means of a lock screw.
· Actuator double acting:
The rear output I and the side output II is used.
The side output I is closed by means of a lock screw.
Pneumatic connections: Do not use Teflon tape for sealant.
The fine fibres could disturb the function of the SRI990. Use
only Loctite® #243 for sealant1).
Screw-type glands for electrical connections are positioned
on the side. Any idle female threads are closed by means of
plugs.
When putting on the housing cover note that the air vent
should face-down (see photo above).
M6
B
K
S
4.3.3 Mounting of the positioner
Fasten the positioner to the upper part of the yoke using 2
spring washers and 2 screws M8 x 80, as shown above.
The rear output I of positioner has contact to the air duct R
in the yoke.
Attention: Note the correct position of the O-ring on the
yoke for the rear connection I!
Note, the carrier bolt B is in the slot of the feedback lever A
and the compensating spring F touches the carrier bolt.
B
Fig.: Feedback lever
1)
Apply only to male thread.
F
A
MI EVE0107 A-(en)
SRI990
1 0
.3 9
1 1
.4 3
4.3.4 Mounting dimensions – direct mounting –
m m
in
3 5
1 .3 8
3 5 ... 9 0
1 .3 8 ... 3 .5 4
F e e d b a c k le v e r
C o d e E B Z G -A fo r 8 ..7 0 m m
tra v e l
6 7
2 .6 4
8
.3 2
3 2
1 .2 6
F e e d b a c k le v e r
F o x P a k /F o x T o p in C o d e E B Z G - E
2 3
0 .9 1
8
.3 2
4 5
1 .7 7
fo r c o n n e c tio n to v a lv e s te m
1 9
.7 5
2 8
1 .1
7 ,8
.3 1
C a r r ie r b o lt
C o n n e c tio n to y o k e u s in g th e d ir e c t
c o n n e c tio n h o le fo r r e a r o u tp u t I ( y /y 1 )
M 6
D e t a il: s h a ft s tu b 9 is p e r p e n d ic u la r
to th e a r r o w 2 6 o n th e h o u s in g ( a t m id tr a v e l r a n g e )
6 2
2 .4 4
9
2 x M 8
2 6
O - R in g
1 0 x 2
0 ... 5 0
... 1 .9 7
1 4
.5 5
13
14
SRI990
MI EVE0107 A-(en)
5 MOUNTING TO ROTARY ACTUATORS
5.1 Type of mount
5.1.1 Preparation of positioner
Applicable to rotary actuators that meet the VDI/VDE 3845
standard for mounting. Installation position of positioner:
Mount the positioner so that the pneumatic connections are
in the same direction as the longitudinal drive axis of the
actuator as shown in the illustration below.
Valve must be in failsafe position2) and the direction of rotation of the actuator drive shaft must be known. These items
are extremely important for proper functioning. These items
can be checked as follows in case they are not clear:
In the single-acting actuator the force of the installed
spring closes. The pressureless actuator is in a failsafe
position. Through manually feeding compressed air it
can be seen whether the actuator drive shaft rotates to
the left or to the right.
In the double-acting actuator (without spring reset) both
air chambers are basically equal. Failsafe position can
be either “open” or “close”. Therefore, indication of the
fail- safe position has to be determined by engineering.
Then the direction of rotation may be determined by
manual feeding of compressed air.
Bolt 2 is screwed into actuator drive shaft 1 for subsequent
centering of the rotary adaptor 3 . The attachment console
is mounted to the stroke actuator (see illustration).
Attention: The feedback shaft 9 of the SRI has no mechanical stop, therefore may spin 360 degrees. The
permissible rotation angle range is between +50 and –50
degrees around the arrow at the housing concerning the flat
area of the feedback shaft (also see detail page 13 bottom).
Since a rotary actuator has a rotary angle of about 90
degrees the mounting as described in the following must be
carried out very precisely.
Attachment diagram for bracket
· Either the side outputs I (or I and II) are used and
2 4
.9 5
Attachment of the positioner to the actuator is made by
using the rotary adaptor kit EBZG -R.
R
the rear output I is closed by means of the lock screw
522 588 013.
Pneumatic connections: Do not use Teflon tape for sealant. The fine fibres could disturb the function of the SRI.
Use only Loctite® #243 for sealant 1).
4 x
6 ,5
.2 6
Caution! Prevent accumulation of water in the instrument
in this mounting position by sealing cable entry against
water. Provide a continuous supply of dry instrument air.
m m
in
5 0
1 .9 7
1 8
.7 1
Screw-type glands for electrical connections are used as
needed. Any unused threaded holes are closed by plugs.
Rotary adaptor
1 4
.5 5
8
.3 1
R
1 0
.3 9
L
4 ,5 + 0 ,2
.1 8
1 3 ,5
.5 3
1 7
.6 7
M 4
.1 7
4 ,2 + 0 ,1
6 ,5
.2 6
1)
2)
Apply only to male thread.
Failsafe position: Defined position in case of failure of input signal
MI EVE0107 A-(en)
SRI990
15
5.1.2 Preparation of the actuator
First the rotary adaptor is being prepared:
For attachment to a counter-clockwise or left turning actuator secure the stud screw 4 in the threaded hole “L”
of the rotary adaptor; hole “R” remains open. See Fig. 27.
For attachment to a clockwise or right turning actuator
secure the stud screw 4 in the threaded hole “R” of the
rotary adaptor; hole “L” remains open. See Fig. 28.
Note: Studscrew should always be tightened into flat on
feedback shaft(9).
Now place the rotary adaptor 3 with two washers 5 on the
feedback shaft 9 of the positioner against the stop.
Note :Stud screw should always be tightened into flat on
feedback shaft(9).
When the product temperature rises, the drive shaft 1 becomes longer. Therefore, the rotary adaptor 3 must be
mounted so that approx. 1 mm (0.04 in.) of clearance results between the drive shaft 1 and the rotary adaptor 3 .
This is achieved by placing an appropriate number of
washers 5 on the feedback shaft stub 9 before attaching
SRI
Direction
of rotation
0 ® 100 %
of feedback
shaft 9
the rotary adaptor. Two washers should result in a clearance of 1 mm.
Now screw and tighten the bolt in the coupling against the
flat part of the feedback shaft(do not screw against thread!).
Finally turn the feedback shaft in such a way that the arrow
of the coupling points to the arrow of the SRI housing.
Beginning and end positions of the actuator drive shaft 1
and feedback shaft 9 are marked in figure 27 (left-rotating
actuator) and in figure 28 (right-rotating actuator) by arrows
for the respective direction of rotation.
The feedback shaft is now in the normal position corresponding to the failsafe position of the actuator.
5.1.3 Mounting of positioner
SRI and actuator are in failsafe position.
Attach the SRI on the console in such a way that the catch
of coupling 3 is guided into the groove of shaft 1. Use bolt
2 to center and align the positioner to the actuator. Be
careful not to shift shafts 1 and 9 and that both shafts are
exactly flush.
Fasten the positioner to the bracket by means of 4 lock washers and 4 screws M6 x 12.
SRI
9
'
5
#
4
"
3
!
2
Rotary actuator
Figure 27: Mounting if actuator is rotating to the left
Direction
of rotation
0 ® 100 %
of feedback
shaft 1
1
Rotary actuator
Figure 28: Mounting if actuator is rotating to the right
16
SRI990
MI EVE0107 A-(en)
6 PNEUMATIC CONNECTIONS
Following alignment and mounting of the positioner to the
valve, pneumatic tubing has to be provided.
n 1
The connection illustrations depend on the respective version.
s
n 1
Explanation of abbreviatons:
s
y 1 -d
Supply air
y1-d Output 1 for direct mounting, depressurized at
currentless electronics. When using this output y1 has
to be closed by means of hex. screw.
n 1
y1
Output 1, depressurized at currentless electronics.
When using this output, y1-d has to be closed by
means of sealing screw and O-ring.
y2
Output 2 for double-acting actuator. Full pressure at
currentless electronics. Closed at single-acting
actuator.
s
y 1
n 2
n1 Hex. screw with NPT thread
n2 Sealing screw with O-ring
y 2
s
y 1
n 2
MI EVE0107 A-(en)
SRI990
17
7 ELECTRICAL CONNECTION
The safety requirements on page 4 must be observed!
Connection to terminals (pos. 3+, 3– ):
Unused cable glands should be closed off.
Guide cable through gland 1. The gland is suitable for
cable diameters of 6 to 12 mm (0.24 to 0.47 in). Observe
the tightness of the cable entry.
Provide electrical connection of input line at screw terminals
3 marked 11+ and 12 - . The terminals are suitable for wire
cross-sections of 0.3 to 2.5 mm2 (22 -14 AWG).
11+ Input w+
12–
Input w–
(Options see table below)
Note: When connecting shielded cable connect the cable
shield only to the system! Do not connect the cable shield to
the SRI !
In order to improve EMV protection by integration into local
grounding the internal and external grounding conduct
connection 4 is available.
/ N u l l p u n k t .
/ S p a n n e
/ V e r s t .
.
D
G
S
Z
h
g
I
S c h a l t e r 3 + 8 a u f
I f ü r B e t r i e b .
S i e h e h i e r z u M I
S 1
D
S w i t c h e s 3 + 8 t o
f o r o p e r a t i o n .
D e t a i l s s e e M I
S 2
1
L E D
2
S t e l l u n g s u n f o r m e r
s i t i o n T r a n s m i t t e r
S 2
L E D
2 0 m A
1
2
)
( m a x )
I n O p e r a t i o n
L E D 1 + 2 O n
g . O u t p u t /
g . A u s g a n g
I m B e t r i e b :
h /
L E D 1 + 2 E i n
k e n > 2 s
Z
–
5 2
P o
S 1
4 m A
m i n
n f i
n f i
P u s
r ü c
A t t e n t i o n
A c h t u n g
+
5 1
(
C o
K o
Z e
S p
G a
D a
. ° C
N T
E
Y
U T I O N
S U P P L
S U I T
F O R 5
A M B I E
E R A T U R
S
C A
U S E
I R E
B L E
O V E
E M P
W
A
A B
T
I
3 2
I -
–
4 2
:
+
4 1
11 +
12 –
r o
a n
i n
m p
R o t a t i o n / D r e h u n g
D O N
C O N N
T O
V O L T
S O U R
I
3 1
I -
1 2
O T
E C T
A
A G E
C E
1 1
The input current can be measured at tip jacks 23+ and 23(integrated in terminals, underneath the screws). The tip
jacks fit plugs with a diameter of 2 mm (0.08 in)
Input W +
Input W –
Option Position Feedback + Alarm
Position Feedback 4 - 20 mA (+)
31 +
32 –
Position Feedback 4 - 20 mA (–)
Optional equipment ‘limit switch’ (see terminals 40 )
SRI990-xxxT, U via inductive sensor
Mark
Signal
41 +
GW1
42 –
GW1
51 +
GW2
52 –
GW2
GW
Binary output ext. supplied
18
SRI990
8
START-UP
8.1
General
First of all, the nameplate should be checked, especially
with respect to references to Ex / non- Ex, input signal,
single / double acting.
Before starting the positioner the SRI must be mounted to
the actuator; and an input signal 4 to 20 mA or split range
have must be available. The supply air connection must
have sufficient capacity and pressure of 1.4 to 6 bar (20 to
90 psig) and should not exceed the maximum operating
pressure of the actuator.
MI EVE0107 A-(en)
Settings via switches and potentiometers
For the setting of the SRI990 and the adjustment of various
parameters 8 dip switches and 5 potentiometers are available. See electronics imprint as follows:
The SRI990 can be adjusted by means of switches and
potentiometers when the housing cover is opened.
Attention: Configuration using switches and potentiometers may interfere with operation of the actual process! During configuration it is recommended that there
is no flow through the valve.
At initial start-up various adjustments have to be set. The
following procedure is recommended:
· Setting of direction of rotation of feedback lever (chapter 8.2)
· Setting of input signal range
e.g. 4 to 20 mA or split range (chapter 8.3)
·
·
·
·
Setting of gain (chapter 8.4)
Setting of zero and span (chapter 8.5)
Setting of damping (time constant, chapter 8.6)
The position indicator 12 is attached to the desired position after selection of the transmission at indicator shaft
(chapter 8.7)
· When attaching the housing cover make sure that the
vent opening points toward the bottom.
The potentiometers are for the setting of:
Zero point (ZERO): P3
·
·
·
·
·
Span (S):
P2
Gain (G):
P4
Damping (D):
P5
Electronics alignment: P1 1)
Single-threaded potentiometers with limited rotation angle
to set gain (G) and damping (D) are available, where the
actual position is indicated by an arrow. To set zero point
(ZERO), span (S) and the electronics alignment1) multiplethreaded potentiometers (approx. 30 rotations) without rotation limitation are used.
The switches are for the setting of:
· Direction of rotation of feedback lever (switches 1, 2)
· Electronics adjustment (switch 3) 1)
· Signal range (switches 4, 5, 6 and 7)
· Pneumatic test (switch 8)
The switch numbers (1 through 8) are imprinted on the
electronics. The possible switch position (“I” and “II”) are
imprinted below switch 8. The switch positions are defined
as follows:
Switch Position “I”:
1)
Adjustment of electronic board (in workshop), see page 23)
Switch Position “II”:
Caution!
Switches 3 and 8 must be in position “I” during operation.
Prior to resetting switches 1 to 8 it is recommended to
shut-off the respective part of the installation since processes are activated influencing and disturbing the
current process. Therefore, it is recommended that no
medium flows through the valve during configuration.
MI EVE0107 A-(en)
19
SRI990
8.2 Setting of direction of rotation
of feedback shaft
If the actuator moves from starting to end position, the direction of rotation of the feedback shaft is to the right or left
hand, depending on the mounting method of the positioner
selected and on the configuration of the actuator (spring
closes/ opens/ double-acting).
For proper functioning this direction of rotation must be set
at positioner (via switches 1+2).
The direction of rotation is defined as direction of rotation of
the feedback shaft from the starting to the end position looking at the positioner from the front. See following illustration
(shown is: left hand mounting, spring closes, direction of
rotation L).
Direction of rotation of feedback shaft of a single-acting
stroke actuator with spring:
Left hand
mounting,
direct mounting
L
R
Spring in actuator
Right hand
mounting
Spring closes
Spring opens
R
L
Direction of rotation of feedback shaft for a rotary actuator:
Actuator opens
rotating to the left
L
Actuator opens
rotating to the right
R
Direction of rotation of feedback shaft of the double-acting
actuator is a. o. determined by the mounting side and the
tubing of the pneumatic outputs to the actuator. It has to be
considered that in a powerless SRI990 the output y1 will
become pressureless and y2 contains air supply pressure.
The direction of rotation of the feedback shaft is set via
switches 1+2; see the following illustration.
L: left-hand rotating feedback shaft
switch 1+2 on “I”
R: right-hand rotating feedback shaftt: switch 1+2 on “II”
Remarks: If the direction of rotation is not in the right manner, the actuator moves to the end position with full force,
and the positioner cannot be controlled.
Definitions
Stroke, stroke range of the membrane actuator is defined for rotary actuator as angle, angle range..
0 % position
is the mechanical impact at actually closed valve (caution if using handwheel and mechanically
adjustable stroke limitation!)
100 % position
is the mechanical impact at actually open valve.
20
SRI990
MI EVE0107 A-(en)
8.3 Setting of Input Signal Range
The following input signal ranges can be set for the SRI990
via switches 4 to 7:
0%
4 mA
4 mA
12 mA
20 mA
20 mA
12 mA
100 %
20 mA
12 mA
20 mA
4 mA
12 mA
4 mA
item
a
b
c
d
e
f
S4
I
I
I
II
II
II
S5
I
I
I
II
II
II
S6
I
II
II
I
II
II
S7
I
I
II
I
I
II
The switch positions for the setting of various signal ranges
are imprinted on the electronics. See illustration.
For 4 to 20mA the switches 4 to 7 are set to position “I” (as
shown).
This concludes the setting of the input signal range!
Split Range
If several positioners are operated at one current loop in sequence with the standard signal 4 to 20 mA, individual valve
positions may be allocated to each device, which also may
overlap if necessary.
1 0 0
x
8 0
This function is useful if an additional control range is demanded which cannot be covered by one valve only. A
valve of smaller nominal size can be applied to the smallest
quantities; a parallel mounted valve of bigger no- minal size
takes on the larger quantities.
6 0
Example: Setting the signal range to 12 to 20 mA
It is recommended to shut off current of the positioner prior
to resetting of the input signal range (turn-off input signal).
The switches 4 and 5 are set to position “I” and switches 6
and 7 to position “II”.
2 0
4 0
%
0
1 0 0
The individual switch positions are shown in the following
illustration.
x
8 0
6 0
4 0
2 0
%
0
4
m A
1 2
m A
2 0
m A
Split range, subdivision of input signal range
Example: At low current, only the smaller valve positions;
from approx. 50 % the large valve is added
MI EVE0107 A-(en)
SRI990
21
8.4 Setting of gain (G)
The loop amplification of the positioner is set via potentiometer P4 for gain (G). The maximum possible gain is
thereby determined by the stability behavior of the control
loop. It is selected in such a way that the actuator no longer
oscillates at constant given input value.
Rotation to the right P4: amplification is increased
Rotation to the left P4: amplification is reduced
If the positioner control loop oscillates, gain (G) must be reduced. It has to be considered that a change of gain changes the control deviation, therefore, requiring setting of the
potentiometer for the position range (zero and span).
8.5 Setting of zero (ZERO) and span (S)
Following settings in chapters 8.2 through 6.4 at initial startup setting of zero point (ZERO) and span (S) are performed
as follows:
a) Enter starting value of command variable (beginning of
stroke).
b) Turn potentiometer P3 for zero point (ZERO) until
actuator just begins to move from its end position.
Rotation to the right P3: zero point is increased
Rotation to the left P3: zero point is reduced
c) Enter final value of variable (end of stroke)
d) Turn potentiometer P2 for span (S) until actuator exactly
reaches its end position.
Rotation to the right P2: span is increased
Rotation to the left P2: span is reduced
These settings influence amplification, therefore adjusting in
chapter 8.4 may become necessary.
8.7 Setting of the travel indicator
The mechanical travel indicator is coupled to the feedback
shaft of the positioner by a gear. The gear has two selectable ratios 1 : 2 and 1 : 6. 1).
Selection of gear ratio:
For rotation angles of the feedback shaft less than 30° select a ratio 1 : 6. This gear selection amplifies the feedback
shaft rotation angle six times and for example, a 20° angle
is shown as 120°.
For rotation angles greater than 30 ° select a ratio of 1 : 2.
This gear selection amplifies the shaft rotation angle by a
factor of two and for example, a 45° angle is shown as 90°.
For rotary actuators the rotation angle is equal to the rotation angle of the actuator. Consequently, a 90° rotation
angle will result in a 180° display angle for the 1 : 2 gear
ratio.
For linear actuators the rotation angle is determined by travel span and feedback lever length. In this case, an exact
180° display angle can only be achieved for a 30° rotation
angle using a 1 : 6 gear ratio. If any other rotation angle results, either the closed or full open positon can be set to be
indicated at, for example 0° or 180°. However, if the closed
position is chosen for display, then the full open display position angle is dependent on travel span, feedback lever
length and gear ratio. If the full open position is chosen for
display, then the closed positon angle becomes dependent.
Setting gear ratio:
Remove travel indicator 12. Pull out pin 12b for a ratio 1 : 2
or push in the pin for a ratio 1 : 6. Use a smooth turning
operation to free the gears and to set pin 12b against the
stop. See illustration.
1 2
1 2 b
8.6 Setting of damping (D)
Potentiometer P5 for damping (D) influences the dynamic
behavior of the actuator at a discontinuous change of the
input signal. The input signal is provided with an additional
time constant for this purpose. The time constant is only
noticeable in the position control loop if the time constant
set via potentiometer is larger than the position time of the
actuator.
Rotation to the right P5: damping is increased
Rotation to the left P5: damping is reduced
The effect of the positioning time may be checked by entering input signal jumps. The range limits and the gain are
not influenced by a change.
1 : 2
1 : 6
Turn the travel indicator 12 to the desired position, put it on
the gear shaft against the stop and pinch the wire ring for
secure coupling.
1)
The values are rounded for making easier calculations. The exact ratios
are 1 : 1.83 and 1 : 6.28 .
22
SRI990
8.8 Start-Up of Position Transmitter (4-20 mA)
for SRI990-xIQxxx
General
The electrical position transmitter is an accessory either
installed in the factory or retrofit. It converts the stroke or
rotary movement of an actuator into an electrical standard
signal 4 ... 20 mA.
Attachment and start-up of the unit to the actuator must be
performed according QG EVE0107 A. At 50% stroke, the
control lever must be horizental. The electronic connection
of the position transmitter must be assured. Both LED's are
then light up.
Adjusting the start of the measuring range (4 mA)
a) Move the actuator to the starting position.
b) Press push button S1 "Config output 4 mA" longer than
2 s. During this time LED 1 lights up. After 2 s both
LEDs are light up again, the value for 4 mA is stored.
Adjusting the end of the measuring range (20 mA)
a) Move the actuator to the end position.
b) Press push button S2 "config output 20 mA" longer than
2 s. During this time LED 2 lights up. After 2 s both
LEDs are light up again, the value is for 20 mA is stored.
MI EVE0107 A-(en)
8.9 Basic adjustment of electronics
Attention: Service only
The electronics unit has been sufficiently factory-adjusted;
an adjustment at delivery is not required. The potentiometer
is secured by means of lacquer against unintentional
operation.
In the event an adjustment of the electronics becomes necessary (e.g. following exchange of electronics) the procedure is as follows:
a) Enter input current 4 mA.
b) Switch S3 to “II”: positioner control loop is opened.
c) Turn potentiometer P1 until actuator just begins to move
from its end position.
d) Return S3 to “I”.
8.10 Pneumatic test
Attention: Service only
To check the pneumatic parts of the positioner by directly
applying current to the IP module (no control).
Procedure: Put switch 8 in position ”II” (see illustration).
Random adjustment of the current values at the
end points
a) Move the actuator to the end position, where you want
to adjust the current.
b) Press both buttons simultaneously for about 2 s. Then
both LED's are alternating flashing in a slow frequency.
c) With push button S2 "Config Output 4 mA" the output
current value can be increased. Pressing the buttons for
a short moment results in a small change and pressing
the button for a longer time results in a fast mode for a
bigger change. The value of the current can be freely
decreased between about 3,3 and increased up to 22,5 mA.
d) Without any additional manipulations of the push button
the new value is automatically saved. After a few
seconds, the device returns into the normal operating
mode, indicate by both LED's that are then light up
again.
Trouble shooting of the position transmitter
The components of the position transmitter are under
constant surveillance by the installed micro controller.
Errors are detected and indicated when both LED's are off
or both LED's are paralell flashing at a fast frequency.
In the event of fatal error, e.g. potentiometer not connected,
an output current of more then 24mA will be shown in
addition to the error indication given by the LED'S(fast
flashing).
In this case check the following:
a) if the potentiometer is correctly connected to the
electronic board.
b) if the potentiometer is within its working span.
When both LED's are off, the supply voltage should be
checked (minimum tension, polarity)
Attention!
Resetting of switch 8 initiates actions influencing and
possibly disturbing the current process! Therefore, no
medium should flow through the valve during these
settings.
Setting switch 8 to position “II” actuates a pneumatic test,
checking the function of the positioners pneumatic system,
including its control. If switch 8 is set from position “I”
(condition of operation) to position “II”, the pressure in the
actuator goes to nearly full air supply pressure. The
actuator moves in the direction associated with maximum
pressure.
If no reaction is shown, check:
- does air supply exist?
- is plug connected to IP module?
If these items are okay, possibly the electronics, or a pneumatic part, are defective. Exchange see page 24.
During operation switch 8 must be in position “I” at all times!
9 DECOMMISSIONING
Before decommissioning the unit, disconnect supply air and
the electrical input signal.
MI EVE0107 A-(en)
10
SRI990
23
DIAGNOSIS
Fault
Actuator does not react
to existing input signal or
to changes of input signal
Possible cause
Pneum. connections were interchanged
Electric connections were interchanged
Wrong setting of zero and span
IP module or pneumatic part defective
Direction of rotation interchanged
Supply air capacity insufficient
Output pressure does not reach
full capacity
Actuator moves to end position
Unstable behavior,
position control circuit oscillates
IP module defect
Filter in air supply connection plugged
Positioner mounted on wrong side or
switch1+2 set faulty (R/L)
Pneumatic test still active (switch 8 = “II”)
Pneumatic connections were
interchanged (double-acting version)
Gain too high
Friction on valve packing too great
Piston actuator:
Friction at cylinder too great
Stroke range cannot be set
Positioner does not fully decompose
pressure
Pneumatic test is without effect
No air supply
No input signal
IP module is not connected, or
IP module or a pneumatic part defective
Solution
Check pneum. connections, see page 16
Check electric connections, see page 17
Check, see page 21
Carry out Pneumatic Test,
possibly change part, see page 25
Change direction of rotation
Check air supply
Carry out Pneumatic Test,
possibly change module, see page 25
Exchange filter, see page 24
Check mounting side as per table page 19
Return switch 8 to “I”, see page 22
Check connections, see page 16
Reduce gain, see page 21
Loosen packing gland slightly or replace
Reduce gain, see page 21
Check air supply (max. 6 bar)
Check gain, see page 21
Carry out pneumatic test (switch 8 = “II”),
see page 22
Connect air supply
Connect input signal
Connect IP module, or
exchange part (workshop)
24
11
SRI990
MI EVE0107 A-(en)
MAINTENANCE
11.1 General
11.3.1 Conversion of positioner
The positioner SRI990 requires little maintenance. When
replacing components during repair work, the safety
requirements on page 4 must be observed!
Positioners of the POSYS series consist of identical
mechanical and pneumatic components and accessories.
A conversion to either a “digital” or “intelligent” positioner is
possible by simply exchanging the electronics unit.
11.2 Supply filter replacement
Please refer you to TI EVE0102 U for an upgrade
An obstructed supply filter can be replaced. Unscrew the air
supply fitting, remove the filter and exchange the filter with a
new one.
11.3 Removal of electronics unit
Pull off travel indicator 12 . To remove the electronics unit
40, loosen the 7 screws at front, see illustration below.
Lift off electronics unit vertically to top. Disconnect plugs 41
and 42 (see page 25) from the board. Do not use tools to
remove plugs because components could be damaged.
Tight-fitting plugs can be easily removed by tilting them
diagonally inward before pulling them off.
Connect plugs 41 and 42 to the new electronics unit 40
and attach the new unit by using the 7 screws at front
(attention with the cables).
4 0
1 2
MI EVE0107 A-(en)
SRI990
25
11.4 Replacement of mechanical and
pneumatic units
First remove the electronics unit 40 (see preceding page).
Replace 4 O-rings between preamplifier 45 and base
plate1) and install new preamplifier.
11.4.1 Amplifier replacement
Release the pneumatic amplifier 43 from the base plate
and replace O-rings between the amplifier and base plate1).
Use 3 O-rings for a single-acting amplifier and 5 O-rings for
a double-acting amplifier. If replacing a single-acting amplifier with a double acting, remove sealing screw 44 before
installation.
11.4.3 Replacement of IP module
The air capacity throttle screws have to be released until
the screw head is even with the amplifier surface ( = no
throttling).
First remove feedback lever or rotary adapter from feedback shaft. Now remove retaining ring from feedback shaft
9 (see page 6). Remove screws and pull out complete unit
49 consisting of feedback shaft, gears and position sensor.
Remove the IP module 48 from base plate and replace
with new IP module. Replace the O-ring between IP module and base plate and install new IP module.
11.4.4 Replacement of Feedback unit
11.4.2 Preamplifier replacement
Insert new feedback unit 49 and secure with screws.
Remember to replace the retaining ring at feedback shaft.
Unscrew the preamplifier 45 from the base plate by removing screws 46 and 47 .
4 1
4 8
4 3
4 2
1)
4 9
4 6
4 5 4 7
The base plate consists of a manifold and air ducts. O-rings are
required to guarantee sealing of the mounted elements.
4 4
26
12
SRI990
MI EVE0107 A-(en)
OPTION “Limit switch”
Remove three screws 1 including tooth lock washer from
plastic cover.
Attach limit indicator 2 so that the flattened shaft end 19
contacts the groove of the limit indicator shaft in the positioner.
Attach limit indicator by means of three screws 3 and
washers. The feedback shaft at back of positioner should
easily be turnable, thereby also moving the vanes of the
limit indicator. If this is not the case, loosen screws 3 and
flush- align the shafts of positioner and limit switch (turn
coupling shaft several times).
1 9
A
1 2
Replace short travel indicator 12 by long travel indicator.
B
Screw high cover 20 (or standard cover with insert frame)
on housing.
C
2 8
Switch functions
Feedback lever, feedback shaft and the control vanes are
all connected to each other, without an intermediate transmission. The control vanes are therefore moving simultaneously with the same angle rate as the feedback lever.
The length of the control vane corresponds with the swing
angle of 120°.
x = 1 0 0 %
1
1 0 0 %
x 0 %
1 0 0 %
x = 0 %
Both control vanes are located on different planes. Each
control vane can be seen independently from the other, because each has its own sensor.
By adjusting the screws (after loosening the center screw
10 ), the control vanes can be adjusted relative to the angle
rate, so that e.g. one vane dives into and another dives out
of the sensor (see illustration).
x 0 %
x = 1 0 0 %
1
x = 0 %
Setting limit switch trigger points
First loosen screw S until disc D is no longer blocked by
bolt B . Then turn disc by 90°, until set screws 1 and 2 are
accessible.
B
S
D
1
Set trigger point switch GW1:
Turn screw 1 at mark (•), until desired switch behavior
is reached.
Set trigger point switch GW2:
Turn screw 2 at mark (• •), until desired switch behavior
is reached.
To fix switch points turn disc again by 90°, until the bolt
catches, then fasten tight the center screw S .
Do not touch control vanes during operation
danger of injuries!
Levels of control vanes (illustration without cover)
2
MI EVE0107 A-(en)
13
27
SRI990
SYSTEM CONFIGURATION
The safety requirements in page 4 must be observed!
13.1 Non-intrinsically safe operation
The SRI990 can be connected directly to the 4 to 20 mA
output of the process control system or controller. Load RL
approx. 300 Ohm.
All components connected to the SRI990 in a hazardous
location must be Ex-approved. The limits are not to be exceeded in any case. These limits are also valid for connection of other capacitances, inductances, voltages and currents. Additional options may have different limit values
than the basic device. See Product Specification Sheet
PSS EVE0107 A-(en) and/or Certificate of Conformity.
S R I9 9 0
P C S , C o n t r o lle r
R
4 -2 0 m A
L
13.3 Split range
13.2 Intrinsically-safe operation
The SRI990 can be connected directly to an intrinsically
safe 4 to 20 mA output of the process control system or
controller. If no intrinsically safe output is available, a
suitable buffer amplifier or safety barrier with an intrinsically
safe output must be connected. During intrinsically safe
operation the connection must be checked for conformance
to intrinsic safety before commissioning.
Controller / process control system-output intrinsically safe:
S R I9 9 0
P C S , C o n t r o lle r
If several actuators are to be controlled from an identical
conduct variable and carry out full stroke only in a certain
portion of this conduct variable, an individual SRI990 is to
be provided for each actuator the zero and span of which
can be set to the respectively desired partial range of the
conduct variable.
The positioners are electrically switched in series. It is
important that the permissible load of the process control
system or controller is not exceeded (RL of an SRI990
approx. 300 Ohm).
The output voltage (idle voltage) must be >8.5 V per
connected positioner. The total line capacitance is not to
exceed 1 mF.
Example: 2-fold split range
in t r in s ic
s a fe
R
4 -2 0 m A
L
S R I9 9 0
P C S , C o n t r o lle r
R
4 -2 0 m A
L
h a z a r d o u s lo c a tio n
Controller / process control system-output not intrinsically
safe:
S R I9 9 0
P C S , C o n t r o lle r
n o t
in t r in s ic
s a fe
4 -2 0 m A
R
4 -2 0 m A
2
L
II949
*)
For split range
L
R
2 4 V
h a z a r d o u s lo c a tio n
The following devices may be used:
TV228
R
During intrinsically-safe operation identical conditions as
described in chapter 13.2 are valid.
A C /D C
Device
TV928
S R I9 9 0
Input
Load R2
600 W
drives n *)
SRI990
1 pc.
< 100 W
700 W
2 pcs.
RL+200 W
580 W
1 pc.
50 W
Drives load
at output
Setting of the positioners is described in page 20.
28
SRI990
MI EVE0107 A-(en)
DIMENSIONS
M 8 x 1 0
3 0
1 .1 8
3 0
1 .1 8
M 8 x .3 9 d e e p
1 .2
3 .6 6
4 .3 3 *
1 1 0 *
9 3
1 5
.5 9
1 0
.3 9
3 0 ,6
1 5
.5 9
3 0
1 .1 8
2 x
m m
in
1 7 6
6 .9 4
1 1 7
4 .6 1
M 6 x 1 0
M 6 x .3 9 d e e p
.5 1
8
2 x
1 9
.7 5
8 ,4
.3 3
.3 1
7 3
2 .8 7
1 2 1 ,3
4 .7 8
1 3
5 0
1 .9 7
4 x
1 4
.5 5
6 2
2 .4 4
*) Dimension with high cover
at option “Limit switch”
Subject to alterations - reprinting, copying and translation prohibited. Products and publications are normally
quoted here without reference to existing patents, registered utility models or trademarks. The lack of any such
reference does not justify the assumption that a product or symbol is free.
FOXBORO ECKARDT GmbH
Postfach 50 03 47
D-70333 Stuttgart
Tel. # 49(0)711 502-0
Fax # 49(0)711 502-597
http://www.foxboro-eckardt.com
http://www.foxboro.com/instrumentation
DOKT 536 022 046
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