Single Loop Controller YS1000 Series

Transcription

1 Single Loop Controller YS Series Single Loop Controller Bulletin B8A-EN

2 Adding value for the customer We are continuing to offer the YS, embodying the quality and reliability we have cultivated over the decades. Incredibly easy to read display TFT LCD makes it even easier to read. Even wider viewing angle (at least. times wider than our previous model) LED back light for brighter performance (at least. times brighter than our previous model) Greater contrast (at least times greater than our previous model) High reliability Dual CPU and manual control ensure high reliability. Improved maintainability Easy to upgrade The Next Evolution of the YS Series Loop Controller 3 Years of Reliable Control! The new YS Series of single-loop controllers is the successor to the Yokogawa YS and YS8 single loop controllers. The YS Series offers improved connectivity with supervisory systems and incorporates new, enhanced features that help operators work more effciently. The YS will work effciently in petrochemical, chemical, power, pulp and paper, boiler and combustion control applications. A YS beyond... With the YSS setting software, you can convert your SLPC and YS7 programs with YS7 programs. YS and YS8 compatible models also available. with 7 x mm cutout FM/CSA certification planned Envision a plant... YS Series is a core building block of Yokogawa's VigilantPlant solutions that promise to bring operational excellence. 3

3 Easy to use Functions that support process operations Color LCD that s easy to see and easier to use. Meter display Event Display TREND Display ALARM Display Digital values displayed side-by-side with an intuitive analog meter makes the YS the perfect replacement for YS8 or obsolete moving coil controllers. Displays when events are occurring. messages can be displayed in English, Chinese, Japanese and other languages. Your selection of up to analog inputs or outputs can be displayed as trends. Color LCD alarm display makes it easy to identify and review alarm activity. Single-loop controller LOOP Display Loops color-coded for easy identification DUAL Display Ideal for -element control such as cascade or selector control Uses a TFT LCD + LED back light display Maintains good visibility, even on panels subject to direct morning and evening sunlight. Note: Avoid constant exposure to sunlight as this can shorten the lifespan of the LCD display. Designed with a lightweight, compact case YS mm,. kg YS 3 mm, 3. kg YS8 8 mm, kg YS8 YS YS Provides for greater freedom of instrumentation design Compact, lightweight design allows the use of smaller and less expensive panel. Moreover, it allows attachment to doors which was previously difficult.

4 Reduction of engineering costs YS Configuration and Programming Software Your Choice of Programming Style: Graphical or Text Based New Graphic Programming Tool Original Text Based Programming Supports on-line module monitoring function Program capacity Supports Blocks YS7 Backwards compatible with existing programs. Conversion software for existing YS7 user programs is available. Program capacity Supports steps.. times of the previous YS7. SLPC Backwards compatible with existing programs. Conversion tool for importing programs from YS8 SLPC ROM is available. Programming is easier with our intuitive function block programming. The online module monitoring function allows you to confirm the performance while programming. Backwards compatible with existing YS7 users programs. Increased programming capacity allows you to create more sophisitated control schemes. Three connection modes Full set of computation functions Connection modes: USB, Ethernet or RS8 When connecting via RS8 or Ethernet, a communication option is required on the main unit. Configuration and Programming Software YSS Ethernet communications Dedicated USB cable RS8 communication Supports parameter setting for all YS models Support for YS7 custom programming. - Calculations done using Engineering units and Floating point math. - Includes over one-hundred computation modules for exponents, logarithms, temperature/pressure correction, and other operations. - Function blocks (sub-programs) can be saved and reused. Password protection function Passwords can be assigned to user programs to prevent unauthorized access to proprietary programs. A password on the main unit prevents unexpected changes in the engineering parameters. Calibration tool Following the YSS s online calibration instructions makes calibration easy. Calibration records and data can be saved on the YS, allowing you to load or print past calibration data as needed.

5 High reliability Improved process up time Control output backup function The control output backup function comes standard with YS series controllers (YS7 and YS) and the Manual Station for MV Setting (YS3). Dual CPU Battery free memory backup Nonvolatile memory is used for memory backup. Service life is improved because no batteries, backup capacitors, or other components are used. Improved basic control performance Display signal Display CPU Display CPU's process at normal condition Main CPU's process at normal condition Back-up process at fail Main CPU The YS series achieves higher performance than previous models (YS series). I/O accuracy Voltage input accuracy: ±.% ±.% Voltage output accuracy: ±.3% ±.% Current output accuracy: ±.% ±.% Internal data resolution of the I/O signal: / / Internal computation resolution of PID and other computations: / /3 MV operation Key operation Control Circuit D/A converter A/D converter MV MV Output Circuit Hard Manual MV AC/DC power supply resists powerline fluctuations. The AC/DC (V/V) power supply powers the instrument to provide consistent performance.also accepts DC power regardless of polarity (specify V power supply when ordering). With dual-cpu construction (main CPU and display CPU), manual control capability and display continues even if an abnormality occurs on one of the CPUs. If controller self-diagnostics detects a control circuit failure, the controller can suspend analog/digital output, switch to manual mode and allow manual control by operator. Functions Failure area Control with Hard manual Manual operation with front keys Main CPU fail Display CPU fail Display for and Control algorithm stop stop All CPU and Control Circuit stop Controller online replacement function (portable manual station) Use the YS portable manual station when exchanging or performing maintenance on a controller. You can switch to the spare controller without interrupting the control output. Manual operation Hard manual Front Panel YS7, YS Controller YS Portable manual station Manual operation is possible even if all CPUs and control circuits are in a fail state. Replace the display while retaining output. The display unit is replaced by Yokogawa service personnel. Recommended LCD replacement period: 8 years Hard manual operation wheel Independent manual override is built into the control circuits, ensuring that control output can continue even when a control circuit including the CPU experiences a problem. Brightness (%). Slow to deteriorate New YS Previous model. Year * Test data of our company

6 Powerful and Flexible System connectivity functions Ethernet support The instrument can be easily connected to DAQWORX, SMARTDAC+ general-purpose SCADA, and OPC servers via Ethernet (Modbus/TCP). Measured data from the YS can be recorded on the GX. Note: The GX requires the communication channel function option (/MC). Ethernet (Modbus/TCP) Ethernet (Modbus/TCP) Expandable I/O Additional I/O can be added by selecting the YS7 basic model (with Expandable I/O). The total number of input/outputs points with the main unit and Expandable I/O are 8 analog inputs, analog outputs, and DI/DO. External AI: 3 inputs External AO: outputs External DI: points External DO: points GX/GX Note: An interface for the additional Expandable I/O cannot be added after delivery. If there is a possibility that extra input/outputs will be needed, we recommend that you start with the basic model (with expansion I/O). with PLC Connections are enabled using the FA-M3 s UT link module and the RS8 communication function. No programming is necessary to exchange data between the instrument and the FA-M3. RS8 FA-M3 with CENTUM As with previous models, communication with Yokogawa s DCS (CENTUM) is supported. This is ideal for DCS backup in chemical plants and other applications requiring extreamly high reliability. Applicable Models: YS7, YS, YS3, and YS3 CENTUM VP HIS FCS FCU Control bus ALR Please specify the communication options /A3 (RS-8 communication) to directly communicate with the CENTUM. YS7 YS7 YS7 The YS can also be connected to PLCs of various manufacturers via the Modbus communication protocol. Note: Direct communication with CENTUM. RS8 YS7 YS YS3 YS3 Peer-to-peer communication function A sample of System Construction With peer-to-peer communication, up to 3 YS7 can be connected interchangeably. Four of the connected instruments can each output points of analog data and points of status data. This makes data exchange and I/O sharing possible since all instruments under peer-to-peer communications can read all data ( analog and status data). This is optimal for multi-loop control as such with boiler instrumentation. I/O sharing Data sharing RS8 Field instruments Inter-lock system YS3 Upper system YS7 Note: Does not support the YS series peer-to-peer communication network (YS-net). YS Maximum no. of connections : 3 No. of receiving units : 3 No. of transmitting units : Transmitted data : analog and status data per transmitting YS7 interval : ms average (not synchronized to the control computation interval) YS3 YS3 Field wiring Signal in the panel 7

7 TAGTAGTAG MV 3. % ALARM STC-ON C. STC ON. C O C Compatibility Total cost reduction Cases and housing for replacing old models Indispensable for lasting, stable operations at the plant when replacing instrumentation. Case and housing are available for replacement of older-model SLCs by Yokogawa Electric Corp. (the EBS, I, EK, and HOMAC series) allowing you to exchange instruments without modifying existing instrumentation panels. Moreover, front panel design with analog-like meters lets you update to new instruments without losing the familiarity of the old interface. line* YS* YS8* YS8* EK* I,EBS* YS compatible type internal unit Case Housing Case Housing Housing Housing *: Compatibility is established by inserting the YS s internal circuitry of the appropriate compatible type into the existing case. *: Compatibility is established by inserting the entire YS unit of the appropriate compatible type into the existing controller housing. Order the housing separately as needed. YS8 YS Self-tuning (STC) Simplifies tuning when starting up or changing the process unit under control. Setpoint filter (F) Can optimize tracking with changes in set-points. Also can maintain optimum responsiveness to disturbances. Before STC After STC Before STC P = 8% P = 8% P = % I = sec. I = sec. I = sec. MV 8 D = sec. SFA =. MV 8 D = sec. SFA =. P V P V P V Time (min.) Time (min.) Time (min.) SFA : F Parameter MV 8 D = sec. SFA =. At disturbance optimum responsiveness to disturbances. At set-point change without F Set-point change with F optimize tracking with changes in set-points Flexible DI/DO The YS7/YS s six DI/DO terminals can be used for both input and output. Programmable function key With a user program, the program function key (PF key) on the instrument s front panel can be used as an ON/OFF switch for self-tuning, or as a Start button for sequence operation. Direct input function* An optional signal conversion function can be added for channel. Current, voltage pulse, thermocouples, RTDs, mv and potentiometers signals from differential pressure gauges, manometers, and flow meters can be connected directly to the controller. The direct input employs highly noise resistant, isolated inputs. TC mv RTD LOOP C 3. C 7.3 H.MAN C A M Pulse wire transmitter * Options available for suffix code,, of Type. 8

8 Applications Automatic Boiler Control An appropriate distribution of control functionality enables safe and stable automatic boiler control. (Boiler master) Main steam pressure control FF Fx Feed water level control Cascade PRD control FF Residual Chlorine Control With the -loop control function, you can control hypochloric flow control and residual chlorine. Loop : Hypochloric flow control Calculates hypochloric infusion from the flow, infusion rate, concentration, and specific gravity, and controls the flow. Loop : Controls residual chlorine Control is achieved by receiving signals from a residual chlorine analyzer. The infusion rate from loop is corrected by this control output. Steam X Air flow control Fuel flow control Drum level Main steam pressure Main steam flow Feed water X3 X Y Exhaust gas oxygen Fx concentration control Fuel oil Fuel oil flow Air flow Oxygen Exhaust concentration gas Pump Air Residual chlorine analyzer -Cascade Primary Direct (PRD) control: Enables stable level control when the boiler is started. -Cross limiting control calculation: Air and fuel flow are calculated so that air flow always exceeds fuel flow to prevent incomplete combustion and explosion. -Feedforward (FF) control: The main steam pressure and feed water level are controlled quickly in response to changes in the main steam flow. Water Flow Flow Models and Suffix Codes (See General Specification Sheets for the ordereing information in the detail.) Suffix codes can be used to select models with or without manual control. YS7 YS YS3 YS3 YS3 Use Type Model Suffix code option code Description Direct input * 3 Certification /A /A /A3 /A /A /A /A7 /A8 /DF /A3 /A3 /A3 /FM /CSA Programmable Indicating controller Indicating controller Indicator with alarm Manual setter for setting Manual setter for MV setting In case of YS7, YS and YS3: With hard manual unit In case of YS3 and YS3: Always - Without hard manual unit Basic type Basic type with expandable I/O * type for YS (with YS case) CE marking, IP CE marking, IP CE marking type for YS8 internal unit, type for EBS, I, EK and HOMAC type for YS8 ( size for YS8 with YS terminal) type for line (with YS terminal) VAC, VDC VAC mv input Thermocouple input RTD input Potentiometer input Isolator -wire transmitter input (isolated) -wire transmitter input (non-isolated) Frequency input Direct input with Fahrenheit temperature range function * 7 RS-8 communication (PC-link, Modbus, YS protocol, Peer-to-peer) * * DCS-LCS communication * Ethernet communication (Modbus/TCP) * FM nonincendive approved (FM Class I, div ) * (To be approved) CSA safety and nonincendive approved (Class I, Division ) * (To be approved) Model Suffix code option code Description YSS - Setting software for YS series Always Always (with CD Media and proprietary cable) Accessories (sold separately) Product name SHUP standard housing SHUP long housing SHUP EK/HOMAC housing Line pneumatic instrument replace housing Ω terminating resistor Ω shunt resistor Option User programming Expandable I/O Ethernet communication RS8 communication (PC-link, Modbus, YS protocol) RS8 communication (Peer-to-peer) DCS-LCS communication Direct input Model SHUP- SHUP- SHUP- YS YS YS YS7 ( * ) ( * ) ( * 3) Remarks Available for YSxx-x3x (Replace for YS8 Series) Available for YSxx-x3x (Replace for I Series or EBS Series) Available for YSxx-x3x (Replace for EK or HOMAC Series) Available for YSxx-xx (Replace for Line pneumatic instrument) For RS-8 communication For a built-in V transmitter power supply YS ( * ) * Can be added only for basic type (when selecting type or ) * Can be added for basic type (when selecting type or ) or compatible type for YS (when selecting type ""). *3 Can be added only for compatible type for YS (when selecting type, and ). Multiple selections are not possible. * Cannot be combined with type 3 * For basic type with expandable I/O only (when selecting type ). An expansion I/O terminal (model: YS) and expansion I/O cable (model: YS) are included. * /A3 and /A3 cannot be specified together. Please specify the communication options /A3 (RS-8 communication) to directly communicate with the CENTUM CS3/VP. Please specify the communication options /A3 (DCS-LCS communication) to communicate with the CENTUM through the SCIU. *7 This option can be combined only with option code /A or /A3.If option code /DF is specified, Fahrenheit temperature range can be available for direct input range in addition to Centigrade temperature range. In case of specifying Fahrenheit temperature range for direct input, option code /DF is required. When the direct input temperature range may be changed to Fahrenheit temperature range after shipment, also specify option code /DF. ( * 3) YS3 ( * ) ( * 3) YS3 ( * ) ( * 3) YS3 ( * ) ( * 3)

9 YS Series Line-up YS7 Programmable Indicating Controller Incorporates A programmable controller in which control and computational functions are combined by the user with the YSS programming tool. Each YS7 can run two PID control calculations simultaneously and output the respective - ma output signals. The YS7 can also be used as a multi-function controller without programming, in the same way as the Model YS. Indicating Controller YS fundamental control functions required for PID control. Necessary functions can be selected in accordance with the user s purpose. The available functions include those necessary for input signal processing, such as square root extraction and linear segment conversion, and feed-forward calculation. Cascade and autoselector control is also possible. Controller mode Control type Control period Additional control function Extended control function Auxiliary control function Analog input Analog output Alarm function Digital signal Retransmission output Input computation Output computation Computation modules Program method Program capacity Security Hardmanual Programmable, Multi-function mode (single-loop, cascade and auto-selector) Basic PID control (built-in nonlinear control function), proportional control (built-in nonlinear control function), sampling PI control, (built-in sampling PI control function), and batch PID control.,. and. sec (programmable mode),. sec (multi-function mode) Adjustable setpoint filter (F), Self-tuning (STC), Non-linear PID control, PID control with reset bias function, output limiter, external cascade-control setpoint signal Input/output compensation, Variable gain, preset PID Feed-forward control, output tracking, preset MV output, / tracking, operation mode change, input filter, Square-root, -line-segment characterizer, ratio to V DC ( channels or 8 channels with with expandable I/O) to ma (or channels), to V DC ( channels or 3 channels with expandable I/O) High/low/high-high/low-low limits, deviation limit, and velocity alarm Six channels (each being common to both input and output),,,, and other analog inputs Square-root with low signal cut off, -line-segment characterizer, first-order lag calculation, scaling of external cascade-control setpoint signal, feed-forward signal calculation Output high/low limiting Four arithmetic operations, square-root, absolute, selector, limiter, ten segmen characterizer, alarm, first-order lag, differentiation, dead time, velocity computations, moving average, timer, program setting, counter, pulse output, temperature/pressure compasations, power, logarithmic, logic computations, comparison, branching, switching, sub-program and register manipulation Function block or text (use YSS configuration and programming software) modules (function block), steps (text) Protection by password Modbus/TCP, RS-8 (modbus, peer-to-peer), and DCS-LCS Yes/No Controller mode Control type Control period Extended control function Auxiliary control function Analog input Analog output Alarm function Digital signal Retransmission output Input computation Output computation Security Hardmanual single-loop, cascade and auto-selector Basic PID control (built-in nonlinear control function), proportional control (built-in nonlinear control function), sampling PI control, (built-in sampling PI control function). sec Adjustable setpoint filter (F), Self-tuning (STC), Non-linear PID control, PID control with reset bias function, output limiter, external cascade-control setpoint signal Feed-forward control, output tracking, preset MV output, / tracking, operation mode change, input filter, Square-root, -line-segment characterizer, ratio to V DC ( channels) to ma ( channel) and to V DC ( channels) High/low/high-high/low-low limits, deviation limit, and velocity alarm Six channels (each being common to both input and output),,,, and other analog inputs Square-root with low signal cut off, -line-segment characterizer, first-order lag calculation, scaling of external cascade-control setpoint signal, feed-forward signal calculation Output high/low limiting Protection by password Modbus/TCP, RS-8 (modbus), and DCS-LCS Yes/No YS3 Indicator with Alarm YS3 Manual Setter for Setting YS3 Manual Setter for MV Setting YS Portable Manual Station Indicating alarm monitor with two inputs for simultaneous monitoring of two loops. High-high, high, low, and low-low alarms can be detected for each of the two inputs, and logical ANDs or ORs of arbitrary alarms can be set. From among these, a total of six alarms can be assigned to alarm output contacts. This manual loader allows an operator to send a setpoint to a remote controller. Its operation mode is switched by the mode keys (C and M) or a status input. A status identification output is provided as standard. This manual loader allows an operator to interrupt a control signal to a final control device and manually control it's operation temporally. Its operation mode is switched by the mode keys (C and M) or a status input. A status identification output is provided as standard. When a YS7, YS or YS3 requires maintenance, the YS Portable Manual Station can be used to output a - ma signal to the final control element. Simply swing up the front panel of the controller, connect this unit to the controller, and replace the internal assembly while keeping the existing manipulated output active. Analog input Digital signal Alarm functions Input computation Security Trend display to V DC ( channels) Six outputs(with one for digital input as backlight off) and one FAIL contact High/low/high-high/low-low limits Square-root with low signal cut off, first-order lag calculation Protection by password, Modbus/TCP, RS-8 (modbus), and DCS-LCS Analog input Analog output Digital signal Alarm functions Input computation Security Trend display to V DC ( channels) to V DC ( channel) Two input, three outputs and one FAIL contact High/low limits Square-root with low signal cut off Protection by password,, MV, and other analog inputs Max. points Modbus/TCP, RS-8 (modbus), and DCS-LCS Analog input Analog output Digital signal Alarm functions Input computation Security Trend display Hardmanual to V DC ( channels) to ma ( channel) and to V DC ( channel) Two input, three outputs and one FAIL contact High/low limits Square-root with low signal cut off Protection by password,, MV, and other analog inputs Max. points Modbus/TCP, RS-8 (modbus), and DCS-LCS Yes/No Input signal Manipulation signal Input/manipulation signal meters Output manipulation I/O connection Models to be backed up to V DC ( channel) to ma DC ( channel) Moving-coil method Range: to % Scaling: equal divisions Manual using the front-panel dials I/Os are coupled with the connector on the case using a dedicated cable. YS7, YS, YS3

10 Block YS7/YS Arrangements YS7 YS7/YS No. Programmable mode Single-loop mode Cascade mode Selector mode Analog input Analog input Analog input 3 Analog input Analog input Cascade set point input Tracking input Feedforward input output (* ) Cascade set point input Feedforward input output (* ) Cascade set point input Cascade set point input output (* ) 3 Transmitter (V DC) Transmitter (V DC) Transmitter (V DC) Transmitter (V DC) SDA () SDB () SDA () SDB () SDA () SDB () SDA () SDB () 7 8 RDA ()or LCS () RDA ()or LCS () RDA ()or LCS () RDA ()or LCS () RDB ()or LCS () RDB ()or LCS () RDB ()or LCS () RDB ()or LCS () Direct input (*) Analog output (ma DC) Analog output Analog output 3 (ma DC/-V DC) Digital output or Direct input (* ) MV (ma DC) MV high limit alarm Direct input (* ) MV (ma DC) MV Direct input (* ) MV (ma DC) MV Digital input output First loop alarm output First loop alarm output 3 Digital output or low limit alarm Second loop alarm output 3 Digital input output Second loop alarm output 3 Digital output 3 or 33 Digital input Deviation alarm output O/C status output L/R status output 3 Digital output or 3 Digital input 3 C/A M status output C/A M status output C/A M status output 3 Digital output or 37 Digital input C A/M status output C A/M status output C A/M status output 38 3 L Digital output or Digital input Action mode switching input Action mode switching input Action mode switching input N G Ground (GND) Ground (GND) Ground (GND) Ground (GND) *: Only applicable for YS compatible terminal type ( ) YS Series (Basic Type) Block YS3/YS3/YS3 Arrangements No. YS3 YS3 YS output (* ) Cascade set point input output (* ) Cascade input output (* ) 3 Transmitter (V DC) Transmitter (V DC) Transmitter (V DC) SDA () SDB () SDA () SDB () SDA () SDB () 7 8 RDA () RDB () RDA ()or LCS () RDA ()or LCS () RDB ()or LCS () RDB ()or LCS () Direct input (* ) Alarm output Alarm output Alarm output 3 Direct input (* ) high limit alarm output low limit alarm output Direct input (* ) MV (ma DC) MV high limit alarm output low limit alarm output 3 Alarm output C/M status output C/M status output 3 37 Alarm output Input for LCD backlight off Input for LCD backlight off 38 3 L Alarm output or Degital input Action mode switching input Action mode switching input N G Ground (GND) Ground (GND) Ground (GND) YS Expandable I/O Arrangements number Expandable I/O Analog input Analog input 7 Digital input 7 Digital input 8 Digital input Digital input number Expandable I/O Analog input 8 Analog output ( to VDC) Digital output 7 Digital output 8 Digital output Digital output Our product names or brand names mentioned in this manual are the trademarks or registered trademarks of YOKOGAWA Electric Corporation (hereinafter referred to as YOKOGAWA). Microsoft, MS-DOS, and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. Ethernet is a registered trademark of XEROX Corporation. We do not use the TM or mark to indicate these trademarks or registered trademarks in this user s manual. All other product names mentioned in this user s manual are trademarks or registered trademarks of their respective companies.

11 7 Dimensions Main Unit Dimensions (YS Basic Type) (YS Basic Type with Expandable I/O) When swung up 7 Note Instrument panel thickness:.3 to mm Clamp bracket 7.8 Expandable I/O cable (YS7 with Expandable I/O). Clamp bracket R MIN. 3 MIN Note Weight: Main unit. kg + Expandable I/O Cable 3 g Note : If a nameplate, etc. is installed within mm above the instrument, the height of the nameplate, etc. must be 3 mm or less from the panel surface. Note : When installing the expandable I/O cable, secure the wiring space of at least mm for a minimum curvature radius of the cable in addition to the mountiing bracket space of 7 mm from the terminal cover face of the main unit. Expandable I/O Dimensions Expandable I/O Cable Dimensions (7) R MxL8 -n. Ground wiring:. mm, green Length: ± mm (when mounted on DIN rail) Weight: g Panel Cutout Width (For single mounting) (For side-by-side mounting) Third angle projection 3 Unit: mm General tolerance: ±(value of tolerance class IT8 based on JIS B -8)/ or more 37 + or more L Panel Cutout Width for Side-by-side Mounting Number of instruments L (mm) to be mounted () 3 ± mm () Weight: 3 g *: When attaching a nameplate or the like to the panel within mm above this instrument, ensure that its thickness is less than 3 mm. *: To ensure adequate ventilation, allow space of at least mm above and below the panel. *3: Front display of YS7 and YS are shown, and they are slightly different from that of YS3 (keytop and front plate and the like). YOKOGAWA CORPORATION OF AMERICA Dart Road, Newnan, Georgia 3, U.S.A. Phone: , Fax: () YOKOGAWA EUROPE B.V. Euroweg, 38 HD Amersfoort, THE NETHERLANDS Phone: (3)-88-, Fax: (3)-88- YOKOGAWA ENGINEERING ASIA PTE. LTD. Bedok South Road, Singapore 7 Phone: ()-33, Fax: ()- YOKOGAWA ELECTRIC CORPORATION Control Instruments Business Division --3 Nakacho, Musashino-shi, Tokyo, 8-87 Japan Phone: (8)---77, Fax: (8) ns@cs.jp.yokogawa.com Represented by : Sign up for our free newsletter Vig-RM-E Printed in Japan, (KP) [Ed : /b] Subject to change without notice. All Rights Reserved, Copyright c, Yokogawa Electric Corporation.