POSITIONERS

Product Specifications

PSS EVE0108
SRD998 Intelligent Positioner with HART Communication

The intelligent positioner SRD998 is designed to operate pneumatic valve actuators and can be operated
from control systems (e.g. the I/A Series System and Evo™), controllers or PC-based configuration and
operation tools such as the FDT/DTMs VALcare™. The positioner is available with HART 7 Communication
Protocol. The extra large multi-lingual full text graphical-LCD, in conjunction with the rotary selector, allows
a comfortable and easy local configuration and operation. For installations in contact with explosive
atmospheres certificates are available.

FEATURES
 Auto-start with self-calibration  Stroke 8 to 260 mm (0.3 to 10.2 in) with standard
 Self diagnostics, status and diagnostic lever; larger stroke with special lever
messages  Angle range up to 95° (up to 120° on request)
 DTM for valve diagnostics and predictive  Mounting onto any linear or rotary actuator
maintenance  Supply air pressure up to 10 bar (145 psig)
 Easy local operation with the rotary selector  Single or double acting
 Extra large multi-lingual full text graphical LCD.  Protection class IP 66
SRD998 AD model with backlight.
 Explosion protection: Intrinsic Safety according
 With HART 7 communication to ATEX/IECEx, INMETRO, NEPSI, PESO,
CNS, EAC, KCs, and TIIS

Equipment should be installed, operated, serviced, and maintained

only by qualified personnel.
No responsibility is assumed by Schneider Electric for any
consequences arising from the use of this material.
PSS EVE0108
Page 2 DESIGN

DESIGN
Figure 1. Design

Using the modular concept of the SRD998, the Single-acting pneumatics have versions B0S, B1S
positioner can be optimally adapted to the and B2S that differ in air flow. For the double-acting
application. In addition to connection manifolds with pneumatics, there are the versions C0S, C1S and
various threads, mounting kits for each drive and C3S, which differ in the air performance.
extensive accessories, these also include integrated
For drives with increased air output, a
pneumatic amplifiers in various performance
correspondingly powerful supply air station is
classes.
required.
Pneumatic Amplifiers
Depending on the actuator, a single or double-acting
pneumatic amplifier is used.
 Codes Bxx - Single Acting
 Codes Cxx - Double Acting
 PSS EVE0108
TECHNICAL DATA Page 3

T E C H N I C A L D ATA

Supply Response Characteristic(1) (2)

Supply air pressure

 B0S, C0S - 1.4 to 6 bar (20 to 87 psig) Sensitivity < 0.1% of travel span
 B1S, B2S - 1.4 to 10 bar (20 to 145 psig) Non-linearity < 0.6% of travel span
 C1S, C3S - 1.4 to 10 bar (20 to 145 psig) (terminal based
adjustment)
Output to actuator - 0 to ~100% of supply air
Hysteresis < 0.3% of travel span
pressure (up to 5.5 bar at 6 bar supply air pressure)
Supply air < 0.1%/1 bar (15 psi)
Air supply - according to ISO 8573-1 dependence
 Solid particle size and density class 2 Temperature effect < 0.3%/10 K
 Oil rate - class 3 Mechanical vibration effect according to IEC 60068-2-6
 Pressure dew point 10 K under ambient (2007) for 10 to 500Hz up to 2g
temperature For Pneumatics B0S < ±0.25% up to 80Hz and
1g
We recommend the use of a filter regulator for air < ±0.25% up to 70Hz and 2g
supply of the positioner. It reduces the air pressure For Pneumatics B1S, < ±0.25% up to 70Hz and
to the actuator’s maximum pressure, keeps it B2S 1g
constant, and filters the air. For the pneumatics with < ±0.25% up to 50Hz and
standard flow (B0S, B1S, C0S) we recommend the 2g
FRS02, FRS03, or FRS923 filter regulator. When For Pneumatics < ±0.25% up to 400Hz
using other brands, a filter grade of 30 μm or better C0S and 1g
is supported. < ±0.25% up to 70Hz and
2g
For the pneumatics with high flow (B2S, C1S, C3S)
we recommend the High Flow Filter Regulator For Pneumatics < ±0.25% up to 55Hz and 2g
C1S, C3S
FRS04 or FRS05 with a filter grade of 5 μm. When
using other brands, a filter grade of 5 μm is In case of high vibrations, we recommend using
supported. remote mounting solution.
Travel Range Note for Single/Double Acting Operation
Stroke range 8 to 260 mm For optimal control performance, we do not
(0.3 to 10.2 in) with
standard feedback recommend the use of double acting positioners
levers; special levers on onto single acting actuators.
request
Rotation angle range Without mechanical stop
up to 95° angle (up to
120° on request)

1. Data measured according to VDI/VDE 2177 and IEC 61514-2

2. With 90° angle, rotary actuator
PSS EVE0108
Page 4 USABILITY

USABILITY

SRD998 Pneumatic Recommended Filter

SRD998 Pneumatic Type Technique Regulator Booster, if required
Single Acting B0S Diaphragm Amplifier FRS923/FRS02/FRS03 VBS200/VBS300 Series
Double Acting C0S Diaphragm Amplifier FRS923/FRS02/FRS03 VBS200/VBS300 Series
Single Acting B1S Diaphragm Amplifier FRS923/FRS02/FRS03 VBS200/VBS300 Series
Single Acting B2S Diaphragm Amplifier FRS04/FRS05 VBS200/VBS300 Series
Double Acting C1S Spool Valve FRS04/FRS05 Booster not recommended
Double Acting C3S Spool Valve FRS04/FRS05 Booster not recommended

P N E U M AT I C P ER F O R M A N C E - A I R F L O W

Pneumatic Performance - Air Flow

Air flow at Air Input/Output 3 bar

Pneumatic Code B0S (Single Acting - Standard Flow, Standard Pneumatic)

to pressurize actuator 7000 Nl/h
to vent actuator 5000 Nl/h

Pneumatic Code B1S (Single Acting - Standard Flow, High Performance Pneumatic)
to pressurize actuator 7000 Nl/h
to vent actuator 5000 Nl/h

Pneumatic Code B2S (Single Acting - High Flow, High Performance Pneumatic) Cv 0.58
to pressurize actuator 21500 Nl/h
to vent actuator 15000 Nl/h

Pneumatic Code C0S (Double Acting - Standard Flow, Standard Pneumatic)

to pressurize actuator 5000 Nl/h
to vent actuator 3750 Nl/h

Pneumatic Code C1S (Double Acting - Standard Flow, High Performance Pneumatic)
to pressurize actuator 7000 Nl/h
to vent actuator 7000 Nl/h

Pneumatic Code C3S (Double Acting - Very High Flow, High Performance Pneumatic) Cv 0.85
to pressurize actuator 33500 Nl/h
to vent actuator 33500 Nl/h

Recommended pneumatics, depending on the actuator size:

 For actuators < 1 dm3 use the C0S, C1S, B0S,
or B1S
 For actuators > 1 dm3 use the B2S, or C3S
PNEUMATIC PERFORMANCE - AIR CONSUMPTION PSS EVE0108
[NL/H] Page 5

P N EU M AT I C PE R F O R M AN C E - A I R C ON S U M P T I O N [ N L / H] (3 )

Pneumatic Performance - Air Consumption [Nl/h]

Air consumption at steady state 3 bar

Pneumatic Code
B0S (Single Acting - Standard Flow) 250 Nl/h
B1S (Single Acting - Standard Flow, High Performance Pneumatic) 400 Nl/h
B2S (Single Acting - High Flow, High Performance Pneumatic) 400 Nl/h
C0S (Double Acting - Standard Flow) 335 Nl/h
C1S (Double Acting - Standard Flow, High Performance Pneumatic) 400 Nl/h
C3S (Double Acting - Very High Flow, High Performance Pneumatic) 400 Nl/h

3. Measured according to ANSI/ISA-75.13.01-2013

PSS EVE0108
Page 6 BOOSTERS FOR INCREASED AIR FLOW

B O O S T E R S F OR I N C R E A S E D A I R F L O W

Volume Booster Series (to order as accessory)

For large actuators or to reduce action time, a volume booster may be necessary.

VBS200/VBS201
Volume boosters with Cv1.4 and pneumatic connection 1/2”
Optional with Exhaust Collector or Silencer
Figure 2. VBS201 Directly Flanged to the Positioner, Optional with Silencer

Figure 3. VBS200 for Remote Mounting

For more information, see PSS EVE0602.

 PSS EVE0108
BOOSTERS FOR INCREASED AIR FLOW Page 7

Figure 4. Mounting Example 1

VBS300/VBS310
Volume boosters with Cv 7 and pneumatic connection 1” for remote mounting.
Figure 5. VBS300 in Aluminum, VBS310 in Stainless Steel 316

For more information, see PSS EVE0603.

PSS EVE0108
Page 8 BOOSTERS FOR INCREASED AIR FLOW

Figure 6. Mounting Example 2

FRS923
 PSS EVE0108
FUNCTIONAL SPECIFICATIONS Page 9

F U N C T I O N A L S P E C I F I C AT I O N S

FEATURES OPERATION AND CONFIGURATION

Automatic Start-up (Autostart Functionality) The local LCD enables a fast and easy configuration
as well as clear diagnostic messages.
Automatic determination of the mechanical end
positions of the valve (initial value and final value), IP  Local - with local rotary selector.
motor parameters, direction of action of the spring,  Display - multi lingual graphic LCD. SRD998 AD
and control parameters. The control parameters are model with backlight.
optimized dynamically during this routine. This The positioner contains the following menu
procedure makes an adjustment and optimization to languages:
the actuator possible without additional manual
English, German, French, Chinese, Portuguese,
settings. Several Autostart modes are available.
Spanish, Polish, Korean, Swedish, Italian,
Russian, Turkish, Japanese, and Czech.
OPTIONS
 Position Feedback 4-20 mA

MANUAL LOCAL AND REMOTE SETTINGS

Table 1. Manual Local and Remote Settings

Actuator mode Linear or rotary actuator
Linear valve Left or right mounted
Rotary actuator Opening clockwise or counter-clockwise
Valve characteristic Linear, equal percentage, inverse-equal percentage or
custom (22 points)
Valve action Opens or closes with increasing set point
Split range Free upper and lower values
Travel limits Free upper and lower values
Cutoffs Free upper and lower values
Stroke range Configurable
Temperature unit Configurable (°C or °F)
Autostart Endpoints
Standard Autostart
Enhanced Autostart
Smooth response
Fast response
PI only
Control parameters Determined during Autostart
Working range Freely adjustable (for indication on LCD)
Manual adjustment of P-gain, I-time, D-time, T63-time, and dead band
Manual operation Manual input of set point to drive the valve in steps of
12.5% or 1%
Pneumatic test Function to test the pneumatic output
LCD orientation Standard, and upside down
PSS EVE0108
Page 10 FUNCTIONAL SPECIFICATIONS

SOFTWARE SUPPORTED CONFIGURATIONS ISSUE HANDLING

 By means of Hand Held Terminal (HART) In case of Single Acting, Safety position at
 PC by means of VALcare DTM Software
 Air supply loss - pressure Y1 = zero
 I/A Series System, EvoTM and other DCS
 Electric power loss - pressure Y1 = zero
 Electronics issue - pressure Y1 = zero
In case of Double Acting or spool valve amplifier,
safety position at
 Air supply loss - pressure Y1 = zero; Y2 =zero
 Electric power loss - pressure Y1 = zero;
Y2 = full air supply pressure
 Electronics issue - pressure Y1 = zero; Y2 = full
air supply pressure

DIAGNOSTIC
To monitor the high performance of the positioner, see Table 2.

Table 2. Diagnostic Utilities

Basic Advanced
Type Diagnostics Diagnostics
Configuration data surveillance Yes Yes
Input current adjustment surveillance Yes Yes
A/D converter surveillance Yes Yes
Position value surveillance Yes Yes
Connection to I/P converter surveillance Yes Yes
Potentiometer surveillance Yes Yes
Angle adjustment surveillance Yes Yes
Surveillance of reaching the set point in a specific time Yes Yes
Temperature limit min or max surveillance Yes Yes
Autostart surveillance Yes Yes
Custom Characterization Yes
Auto diagnostic Yes
Alarm Management Yes
Alarm Output for Switching (with Option board) Yes
Status List according to NE107 Yes
Position History Yes
Response History Yes
Step Response Analyze Yes
PHYSICAL SPECIFICATIONS (COMMON DATA FOR PSS EVE0108
ALL VERSIONS) Page 11

P H Y S I C A L S PE CI F I C AT I O N S ( C O M M O N D ATA F O R A L L V E R S I O N S )

Mounting Materials

Attachment to Stroke Actuators Housing and covers Aluminum Alloy No. 230 (GD-
AlSi12) Polyester Powder
 For casting yoke according to IEC 534-6 coated
(NAMUR) with attachment kit EBZG –H or –H1 Sealings between Silicone elastomer and silicone
 For pillar yoke according to IEC 534-6 (NAMUR) covers core with Ag/Cu particles
with attachment kit EBZG –K or –K1 LCD Window Polycarbonate,U.V. stabilized
Stroke range with feedback lever: External Screws Stainless Steel V2A 1.4301
Motherboard Coated with protective resin
 Standard (EBZG-A) - 8 to 80 mm/0.31 to 3.15 in
 Extended (EBZG-B) - 60 to 120 mm/2.36 to All moving parts of 1.4306/1.4571/1.4104
feedback system
4.72 in (e.g. shaft)
 Extended (EBZG-A1) - 110 to 260 mm/4.33 to
Attachment kits V4A 1.4401 or (depending upon
10.24 in version). Aluminum Alloy
Larger stroke ranges can be realized with special No. 230 (GD-AlSi12) finished
with DD varnish
levers.
Mounting bracket Aluminum Alloy No. 230
Attachment to Rotary Actuators according to (GD-AlSi12)
VDI/VDE 3845 Pneumatic VMQ, PVMQ (Silicone
diaphragms Elastomer, suitable for use in
With Attachment Kit - EBZG -R the paint industry)
(depending upon version)
 Further Attachment kits, see “MODEL CODE
ACCESSORIES” Weight
With pneumatic
 B0S - approximately 2.1 kg (4.7 lbs)
 B1S/B2S - approximately 2.2 kg (4.9 lbs)
 C0S - approximately 2.3 kg (5.1 lbs)
 C1S/C3S - approximately 2.2 kg (4.9 lbs)
PSS EVE0108 PHYSICAL SPECIFICATIONS (COMMON DATA FOR
Page 12 ALL VERSIONS)

Pneumatic Connection Electromagnetic Compatibility EMC

NAMUR mounting - G 1/4 or 1/4-18 NPT via Operating
manifold conditions Industrial environment
Immunity according to
Electrical Connection EN 61326 Fulfilled
Line entry 1 cable gland M20 x1.5, 1/2-14 IEC 61326 Fulfilled
NPT (with Adapter AD-) EN 61000-6-2 Fulfilled
Cable diameter 6 to 12 mm (0.24 to 0.47 in) Emission according to Fulfilled
EN 61326
Screw terminals 2 terminals for input loop. Class A and Class B
Model AD with Universal In- EN 61000-6-2 Fulfilled
Out Option (position EN 55011 Group 1 Fulfilled
feedback): 4 terminals for Class A and Class B
additional inputs/outputs)
NAMUR Fulfilled
Wire cross section 0.3 to 2.5 mm2 (AWG 22-14) recommendation
max torque 0.6 Nm EMV NE21

Ambient Conditions Safety Requirements

Operating conditions According to IEC 654-1, the CE Label
device can be operated at a
class Dx location Electromagnetic 2014/30/EU
Ambient temperature Operation Compatibility
–40 to 80°C (–40 to 176°F) Low-voltage regulation Not applicable
Transport and storage See Declaration of Conformity
–40 to 80°C (–40 to 176°F) Explosion Protection 2014/34/EU
If the device is exposed to
sunlight and the temperature RoHS2 2011/65/EU
may rise above 80°C/176°F,
we recommend a sun shade. Safety
Storage conditions 1K5; 1B1; 1C2; 1S3; 1M2 According to Safety class III
According to IEC EN 61010-1 Overvoltage Category I
60721-3-1 (or IEC 61010-1)
Indicators LCD –25 to 70°C (–13 to 158°F) External circuit Limitation of power supplies
(visible) (a) breakers for fire protection is required
Relative humidity Up to 100% according to EN 61010-1,
appendix F (or IEC 61010-1).
Protection class
According to
IEC 60529 IP 66
a. At temperatures less than –20°C the LCD reacts only slowly;
at temperatures greater than +70°C the background becomes
dark (no damage when back into –20 to +70°C range)
 PSS EVE0108
ELECTRICAL CERTIFICATIONS Page 13

E L E C T R I C A L C ERT I F I C AT I O N S ( 4 ) ( 5)
These positioners have been designed to meet the electrical safety descriptions listed in the following table.
For detailed information or status of testing laboratory approvals/certifications, contact Global Customer
Support.
Model Code
Certification Option
Intrinsically Safe according to ATEX/IECEx A1
II 2G Ex ia IIC T6...T4 Gb; II 1D Ex ia IIIC (a) or IIIB (b) T100°C Da
Intrinsically Safe according to ATEX/IECEx A2
II 2G Ex ib IIC T6...T4 Gb; II 2D Ex ib IIIC (a) or IIIB (b) T100°C Db
Intrinsically Safe according to ATEX/IECEx A3
II 3G Ex ic IIC T6...T4 Gc; II 3D Ex ic IIIC (a) or IIIB (b) T100°C Dc
INMETRO: Ex ia IIC T4/T6 Gb, Ex ia IIIC T100°C Da, IP66 (a) B1
INMETRO: Ex ib IIC T4/T6 Gb, Ex ib IIIC T100°C Db, IP66 (a) B2
INMETRO: Ex ic IIC T4/T6 Gc, Ex ic IIIC T100°C Dc, IP66 (a) B3
NEPSI: Ex ia IIC T4/T6 Ga, Ex iaD 20 T100 Da, IP66 (a) N1
NEPSI: Ex ib IIC T4/T6 Gb, Ex ibD 21 T100 Db, IP66 (a) N2
NEPSI: Ex ic IIC T4/T6 Gc, Ex icD 22 T100 Dc, IP66 (a) N3
EAC: 1 Ex ia IIC T4/T6 Gb X, Ex ia IIIC T100°C Da (a) G1
EAC: 1 Ex ib IIC T4/T6 Gb X, Ex ib IIIC T100°C Db (a) G2
EAC: 2 Ex ic IIC T4/T6 Gc X, Ex ic IIIC T100°C Dc (a) G3
KCs (Korean Certificate Safety): II 2G Ex ia IIC T4/T6 Gb, II 1D Ex ia IIIC T100°C Da, K1
IP66 (a)
KCs (Korean Certificate Safety): II 2G Ex ib IIC T4/T6 Gb, II 2D Ex ib IIIC T100°C Db, K2
IP66 (a)
KCs (Korean Certificate Safety): II 3G Ex ic IIC T4/T6 Gc, II 3D Ex ic IIIC T100°C Dc, K3
IP66 (a)
CNS certification: The SRD998 has the CNS certificate for usage in Taiwan. (a)
PESO certification: The SRD998 has the PESO certificate for usage in India. (a)
a. For Model BD.
b. For Model AD.

For use in hazardous areas in certified safe circuits with the following maximum values for Model SRD998
BD (Certification number: IBExU15ATEX1109X):
Pi Ui Ii T4 T6
900 mW 30 V 130 mA –40°C to 80°C
660 mW 28.1 V 130 mA –40°C to 80°C –40°C to 44°C
630 mW 25.7 V 130 mA –40°C to 80°C –40°C to 46°C
590 mW 25.3 V 130 mA –40°C to 80°C –40°C to 48°C
510 mW 26 V 130 mA –40°C to 80°C –40°C to 52°C

Li = < 10 μH
Ci = < 2.5 nF
IP degree according to IEC 60529 - IP 66

4. With appropriate order only.

5. National requirements are observed.
PSS EVE0108
Page 14 ELECTRICAL CERTIFICATIONS

For use in hazardous areas in certified safe circuits with the following maximum values for Model SRD998
AD (Certification number: IBExU20ATEX1044X):
Supply and sensor circuit in protection type intrinsic safety Ex ia IIC (Terminal + 11/-12)
Ui 30 V / Ii 130 mA
Pi (T4) 0.9 W / Pi (T6) 0.515 W
Ci 25 nF / Li 1 μH

UNI-I/O module circuit in protection type intrinsic safety Ex ia IIC (channel 1: + 13 /-14 and channel 2
(position feedback): + 15 /-16)
Ui 30 V / Ii 130 mA
Pi (T4) 0.9 W (channel 1) or 0.66 W (channel 2)
Pi (T6) 0.550 W (channel 1) or 0.386 W (channel 2)
Ci 28 nF / Li 2 μH

Ambient temperature range:

-40°C up to +80°C (T4)
-40°C up to +40°C (T6)
 PSS EVE0108
ELECTRICAL CERTIFICATIONS Page 15

Torque Definitions for SRD998

10 Nm for Manifold screw (2x)

7 Nm for Main Cover screw (4x): go kitty-corner
2 Nm for Electrical cover screw (3x)
2 Nm for Grounding screw (2x)
0.6 Nm for Terminal Block screws
PSS EVE0108
Page 16 SRD998 WITH HART COMMUNICATION

S R D 9 9 8 W I T H H A RT C O M M U N I C AT I O N

Signal Input Two wire system

Reverse polarity protection Standard feature
Signal range 4 to 20 mA
Operating range 3.6 to 21.5 mA
Input voltage (a) DC 12 to 36 V (unloaded) (a)
min 12 V at 4 mA
min 8.4 V at 20 mA
Load 420 Ohms, 8.4 V at 20 mA
Communication signal HART 7, 1200 Baud, FSK (Frequency Shift Key) modulated on 4 to 20 mA 0.5
Vpp at 1 kOhm load
Input impedance Zi Z = 320 Ohms for ac voltage 0.5 to 10 kHz with < 3 dB non-linearity (b) (c) (d)
Start-up time Approximately 3 seconds
Interruption time without Typ. 8 ms (e)
power down
a. Higher voltage limits may be available upon request.
b. Cable capacity and inductance see HART standard specifications (e.g. C < 100 F).
c. Impedance of other devices at the input (parallel or serial) have to be within HART specifications.
d. Applications without communication cannot exceed input capacitance parallel to the input not higher than 5F.
e. Worst case conditions 4-20 mA, I/P-Output with maximum current.

Configuration DD (Device Description) and EDD (Enhanced

Device Description)
The SRD998 positioner can be configured via HART
by any host system using PC with a HART Modem, In case the host system is not supporting the
Hand Held Terminal or a DCS. FDT-DTM technology, you can download the DD
and/or EDD from the Schneider Electric home
Local page.
By means of rotary selector and LCD display.

DTM (Device Type Manager)

The DTM can be downloaded from the
Schneider Electric homepage:
https://www.schneider-
electric.com/en/download/range/63514-
Valve%20Positioners/?docType=4889330-
DTM+files
The DTM is fully certified for its interoperability
and with the state-of-the-art presentation and
diagnostics features.
 PSS EVE0108
SRD998 WITH HART COMMUNICATION Page 17

Figure 7. Sample Intelligent Positioner SRD998

PSS EVE0108
Page 18 FUNCTIONAL DESIGNATIONS

F U N C T I O N A L D E S I G N AT I O N S
Figure 8. Functional Designations

1 Cable gland 11 Connection base for attachment to rotary actuators

1a Adapter, e.g. 1/2”-14 NPT 15 Turn Rotary Selector for Menu selection and press to
confirm
3 Terminal Block (a) (see Figure 9 for screw 16 LCD with true text in different languages
terminals: +11 and -12 for input loop and
+13, -14, +15, and -16 for Universal In-Out
Option Code 1)
4 Ground connection (inner and outer) 20 Cover for electrical connection compartment
5 Output I (y1) 21 Air vent, dust and water protected
6 Air supply (s) 22 Data label
7 Output II (y2) 26 Arrow is perpendicular to feedback shaft at angle 0
degree
8 Direct attachment hole for output I (y1) 29 Plug for service connector under the lid (factory only)
9 Feedback shaft 30 Connecting manifold, G 1/4 or 1/4 NPT Not required
when mounting a gauge manifold, or a direct mounted
volume booster
10 Connection manifold for attachment to 31 O-ring with filter, for air supply connection
stroke actuators
a. Test sockets (diameter sign) 2 mm, integrated in terminal block.
 PSS EVE0108
ADDITIONAL EQUIPMENT Page 19

Figure 9. Detail of Terminal Block for Model SRD998 AD

Terminals
+11
-12
+13
-14
+15
-16

ADDITIONAL EQUIPMENT

Additional Inputs/Outputs: –Code 1 Electrical Classification ATEX/IECEx for

Additional Inputs/Outputs: –Code 1
Position Feedback 4-20 mA and Alarm with (Certification number: IBExU20ATEX1044X)
Electrical Classification ATEX/IECEx
For electrical ATEX/IECEx classification, see
Stroke/angle derived from positioner feedback: “ELECTRICAL CERTIFICATIONS” on page 13.
One output analog, galvanically separated, two-wire
system according to DIN 19234, for external power Certified under EU-Type Certificate of Conformity
supply IBExU20ATEX1044X and IECEx Certificate of
Conformity IECEx IBE 20.0005X.
Supply Voltage: DC 8 to 36 V
Signal Range: 3.8 to 20.5 mA Certified as intrinsically safe for use in hazardous
areas with the maximum values as described in the
0% and 100% configurable
Certificate of Conformity.
Device fault: < 200 A
Terminal for Position +15 The circuits Channel 1 and Channel 2 are
Feedback (channel 2): -16 electrically separated from each other, from all other
Feedback signal can be reversed (20–> 4 mA) external circuits, and from Ground.
PSS EVE0108
Page 20 ADDITIONAL EQUIPMENT

Remote Potentiometer: –Code V, W, Y For more information about remote mounting, see
PSS EVE0118.
The remote potentiometer is used in applications
where high temperatures or vibration are present NOTE
and can result in negative influences to the control. It The functionality and certifications are only
can also be used in places not easy to reach, to help ensured with our RMU998.
ensure easier handling of the unit, or for cylinders
Electrical Classification ATEX/IECEx
with large strokes. The positioner SRD998, is
mounted far away from the valve or cylinder in a safe For electrical ATEX/IECEx classification, see
environment. “ELECTRICAL CERTIFICATIONS” on page 13.
The Potentiometer unit is mounted on the valve or RMU998 is approved for use with SRD998 (a)(b)
cylinder. The Potentiometer unit can be made by under the following certifications:
RMU998 or by an external potentiometer.
a) EU-Type Certificate of Conformity
The external potentiometer unit must support a IBExU15ATEX1109X and IECEx Certificate of
3-wire system with approximately 5 kOhm Conformity IECEx IBE 15.0028X;
resistance.
b) EU-Type Certificate of Conformity
If the following requirements are fulfilled, the set up IBExU20ATEX1044X and IECEx Certificate of
is insensitive to electrical disturbances caused by Conformity IECEx IBE 20.0005X
high electromagnetic fields, EMC, and HF radiation.
For use in hazardous areas, the remote
Cable length maximum: Model BD 3m (9 ft), potentiometer interface is certified as Intrinsically
AD 10m (32 ft) Safe with the following maximum values:
Cable Specifications:
3-wire twisted pair, shielded Uo = 6 V
Shield needs to be connected on both ends to the Io = 130 mA
internal ground Po = 0.9 W
Shield endings need to be kept very short when
connected to Ground The maximum length of the cable between the
An HF cable gland is not required remote potentiometer and positioner is 3m (for
Model BD) and 10m (for Model AD).

Figure 10. Remote Mounting Unit (RMU998)

 PSS EVE0108
MODEL CODE SRD998 Page 21

M O DE L C O D E S R D 9 9 8
Intelligent Positioner SRD998 Model
Communication
HART H
Diagnostics Performance
Basic Diagnostics BD
Advanced Diagnostics AD
Electrical In-Out Option
No In-Out Option 0
Universal In-Out Option 1
Version
Single Acting B
Double Acting C
Pneumatic Performance
Standard Pneumatic (6 bar max air supply) 0
Standard Flow - High Performance Pneumatic (10 bar max air supply) 1
High Flow - High Performance Pneumatic (Cv 0.58 – 10 bar max air supply) 2
Very High Flow - High Performance Pneumatic (Cv 0.85 – 10 bar max air supply) 3
Fail in case of loss of power
Fail safe S
Housing
Aluminum 1
Mounting
Standard S
Direct mounting T
Remote Mounting of positioner with side mounting potentiometer unit V
Remote Mounting of positioner with top mounting potentiometer unit W
Remote Mounting of positioner w/o potentiometer unit (order potentiometer separately) Y
Pneumatic Connection
1/4 NPT A
1/4 G B
Gauges
Without gauge 0
With 2 standard gauges for single acting (a) 1
With 2 Nickel plated gauges connection for single acting (a) 2
With 3 standard gauges for double acting (b) 3
With 3 Nickel plated gauges connection for double acting (b) 4
Electrical Connection
M20x1.5 7
1/2 NPT (made with an adaptor) 8
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Page 22 MODEL CODE SRD998

M O D E L C OD E S RD 9 9 8 ( C ON T I N U E D )
Intelligent Positioner SRD998 Model
Electrical Certification
without certification ZZ
ATEX/IECEx: II 2G Ex ia IIC T6...T4 Gb; II 1D Ex ia IIIC (c) or IIIB (d) T100°C Da A1
ATEX/IECEx: II 2G Ex ib IIC T6...T4 Gb; II 2D Ex ib IIIC (c) or IIIB (d) T100°C Db A2
ATEX/IECEx: II 3G Ex ic IIC T6...T4 Gc; II 3D Ex ic IIIC (c) or IIIB (d) T100°C Dc A3
INMETRO: Ex ia IIC T4/T6 Gb, Ex ia IIIC T100°C Da, IP66 (c) B1
INMETRO: Ex ib IIC T4/T6 Gb, Ex ib IIIC T100°C Db, IP66 (c) B2
INMETRO: Ex ic IIC T4/T6 Gc, Ex ic IIIC T100°C Dc, IP66 (c) B3
NEPSI: Ex ia IIC T4/T6 Ga, Ex iaD 20 T100 Da, IP66 (c) N1
NEPSI: Ex ib IIC T4/T6 Gb, Ex ibD 21 T100 Db, IP66 (c) N2
NEPSI: Ex ic IIC T4/T6 Gc, Ex icD 22 T100 Dc, IP66 (c) N3
EAC: 1 Ex ia IIC T4/T6 Gb X, Ex ia IIIC T100°C Da (c) G1
EAC: 1 Ex ib IIC T4/T6 Gb X, Ex ib IIIC T100°C Db (c) G2
EAC: 2 Ex ic IIC T4/T6 Gc X, Ex ic IIIC T100°C Dc (c) G3
CNS certification IS (c) (d)
PESO certification IS (c) (e)
KCs (Korean Certificate Safety): II 2G Ex ia IIC T4/T6 Gb, II 1D Ex ia IIIC T100°C Da (c) K1
KCs (Korean Certificate Safety): II 2G Ex ib IIC T4/T6 Gb, II 2D Ex ib IIIC T100°C Db (c) K2
KCs (Korean Certificate Safety): II 3G Ex ic IIC T4/T6 Gc, II 3D Ex ic IIIC T100°C Dc (c) K3
Options
Stainless Steel Label, fixed with wire -L
a. Only to be ordered with single acting model code Version B.
b. Only to be ordered with double acting model code Version C.
c. For Model BD.
d. The SRD998 has a CNS certificate for usage in Taiwan. Please order with ATEX/IECEx model code.
e. The SRD998 has a PESO certificate for usage in India. Please order with ATEX/IECEx model code.
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ACCESSORIES FOR ALL BASIC DEVICES Page 23

A CC ES SO R I ES F O R A L L B AS I C DE V I C ES
Figure 11. Accessories for all Basic Devices

no threads

O ring
with filter
#$"%&
'()%**&%&+

   
 !
   "

   

no threads
  (
Connection manifold for 
single acting positioner %/
with pressure gauges for
supply air s and output y

" 

no threads , 
   
,    
- 
 . ..%
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Page 24 MODEL CODE ACCESSORIES

MODEL CODE ACCESSORIES

Accessories for SRD998 Model
Filter Regulators
Filter Regulator for –30°C to 70°C FRS02
Stainless Steel (316) Filter Regulator FRS03
High Flow Filter Regulator 1/2 inch/Aluminum FRS04
High Flow Filter Regulator 1/2 inch/Stainless Steel FRS05
Mounting Bracket for FRS02 or FRS03 EBZG-FR1
Orientable Mounting Bracket for FRS02 or FRS03 EBZG-FR2
Nipple for direct mounting Filter regulator 1/4 NPT both sides VG-91
Mounting Bracket for FRS04 EBZG-FR4
Mounting Bracket for FRS05 EBZG-FR5
Nipple 1/2 NPT (FRS04/05 side) to 1/4 NPT (SRD998 side) for direct piping VG-93
Communication/Modem/DTM
HART USB Modem (made by Ifak) with ATEX IS Certification MOD900
DTM for SRD Series for HART VALCARE
Service Modem EDC90
Booster Relay (in case of double acting, quantity 2 pieces)
Remote version for a positioner VBS200
Integral volume booster for SRD991, SRD960, SRD998, and SRI990 (directly flanged to positioner) VBS201
Booster Cv7 - Alum Housing - Remote mounting VBS300
Booster Cv7 - SS Housing - Remote mounting VBS310
Limit Switch
Mechanical Limit Switch weatherproof and plastic housing (TE Sensors XCKN2118P20) MLS01
Cable Gland
Cable Gland, M20x1.5 Plastics, Color Gray/Black BUSG-K6
Cable Gland, M20x1.5 Plastics, Color Blue BUSG-K7
Cable Gland, M20x1.5 Plastics, Color White BUSG-K9
Cable Gland, M20x1.5 Stainless Steel BUSG-S6
Adapter
Adapter (Brass With Nickel Coating) M20x1.5 to 1/2-14 NPT (Internal Thread) AD-A5
Adapter (SS) M20x1.5 to 1/2-14 NPT (Internal Thread) AD-A6
Attachment Kits EBZG
For diaphragm actuators with casting yoke according to NAMUR (incl. standard Couple lever) -H
For diaphragm actuators with casting yoke according to NAMUR (incl. standard Couple lever) -H1
- Compact
Compact stainless steel bracket according to NAMUR -H6
For diaphragm actuators with pillar yoke according to NAMUR (incl. standard Couple lever) -K
For diaphragm actuators with pillar yoke according to NAMUR (incl. standard Couple lever) -K1
- Compact
For FoxTop/FoxPak -E1
For mounting to rotary actuators according to VDI/VDE 3845 (without bracket) -R
Brackets VDI/VDE 3845 (A = 80 mm/3.15 in; B = 20 mm/0.79 in) -C1
Brackets VDI/VDE 3845 (A = 80 mm/3.15 in; B = 30 mm/1.18 in) -C2
Brackets VDI/VDE 3845 (A = 130 mm/5.12 in; B = 50 mm/1.97 in) -C3
Brackets VDI/VDE 3845 (A = 130 mm/5.12 in; B = 30 mm/1.18 in) -C4
Universal Brackets VDI/VDE 3845 (A = 80 or 130 mm; B=20 or 30 or 50 mm) -C5
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MODEL CODE ACCESSORIES Page 25

M O D E L C OD E A C C E S S O RI E S ( C O N T I N U E D )
Accessories for SRD998 Model
Couple Lever EBZG
Standard (stroke max. 80 mm) A
Extended (stroke max. 260 mm) -A1
Reduced (stroke < 8 mm) -A2
Fold feedback lever (stroke 8 to 70 mm) -A3
Short stroke (stroke 8 to 35 mm) -A4
Couple Lever Folded (stroke special) -A5
Extended (stroke max. 120 mm) -B
Carrier bolt SRXG
Carrier bolt extra short 23 mm -A
Adjustable carrier bolt 20 to 37 mm -B
Carrier bolt 38 mm -C
Carrier bolt 47 mm -D
Carrier bolt 57 mm -E
Carrier bolt 65 mm -F
Adjustable carrier bolt with fixing system for stem diameter up to 21 mm -G
Adjustable carrier bolt with fixing system for stem diameter up to 34 mm -H
Carrier Bolt 80 mm -I
Adjustable carrier bolt for thread 3/8” -J
Adjustable carrier bolt for thread 5/16” -K
Extension for carrier bolt -L
Adjustable carrier bolt with fixing system centered for stem diameter up to 64 mm -M
Adjustable carrier bolt with fixing system centered for stem diameter up to 21 mm -G1
Adjustable carrier bolt with fixing system centered with extension up to 80 mm for stem diameter up to
21 mm -G2
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Page 26 MOUNTING TO LINEAR ACTUATORS

M OU N T I N G T O L I N E A R A C T U AT OR S
Figure 12. Attachment to Stroke Actuators according to IEC 534-6 (NAMUR), Left Hand

Figure 13. Direct Attachment to Stroke Actuators

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MOUNTING TO LINEAR ACTUATORS Page 27

Figure 14. Attachment to Stroke Actuators according to IEC 534-6 (NAMUR), Right Hand, Mounting Bracket EBZG-K

EBZG-K

Figure 15. Compact Stainless Steel Attachment Kit with Mounting Bracket EBZG-H6

EBZG-H6
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Page 28 MOUNTING TO ROTARY ACTUATORS

M O U N T I N G T O R OTARY A C T U AT O R S
Figure 16. Delivery of Bracket by Manufacturer of Actuator
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DIMENSIONS Page 29

DIMENSIONS
Figure 17. Attachment to Rotary Actuator

Attachment diagram of bracket

Linking piece
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Page 30 DIMENSIONS

Components of Attachment Kits (Samples)

Figure 18. Components of Attachment Kit

Feedback lever Code EBZG-A for 8 to 80 mm travel Mounting bracket

e.g. EBZG -H -K

Feedback lever Code EBZG-B for 60 to 120 mm travel

Feedback lever FlowPak/FlowTop in Code EBZG-E1

Feedback lever Code EBZG-A1 for 100 to 260 mm travel

Carrier bolt for connection to valve stem

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DIMENSIONS Page 31

Figure 19. Dimensions with Manifold

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Page 32 DIMENSIONS

Figure 20. Dimensions with Gauges and Manifold

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TYPICAL MOUNTING Page 33

T Y P I C AL M O U N T I N G
Figure 21. SRD998 with Remote Mounting Unit RMU998-V

Figure 22. SRD998 with Booster VBS201, Directly Flanged to SRD998 with Connection to an Exhaust Collecting System
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Page 34 NOTES

NO T ES
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NOTES Page 35
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Page 36

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