Product Specifications PSS 2C-1A9 B 743CB Series FIELD STATION MICRO Controller The 743CB is a self-contained, field-mounted, microprocessor-based controller with the ability to perform control functions for up to two independent loops. In addition to the standard proportional, integral, and derivative (PID) functions, the controller provides many enhanced functions including Foxboro’s patented EXACT tuning algorithm, user- configurable control functions, auto selector control, split range outputs, auto/manual transfer stations, assignable 3-variable indicator functions, totalization, a comprehensive calculation capability, and signal conditioning. Standard controller signals include: four analog inputs, two frequency inputs, two contact inputs, an optional platinum RTD direct input, two analog outputs, and two contact outputs. A fluorescent display is used to show the control variables in bargraph format, and to provide precision digital readout. It also displays an electronic loop tag, controller status, and alarm indication. A keypad, located on the front of the controller, is used for operator interface and configuration. The controller is housed in a field-mounted enclosure that meets IEC IP66 and that also provides the Boolean Logic Capability environmental and corrosion resistant protection of EXACT Control (Foxboro U.S. Patent RE 33267) NEMA Type 4X. The enclosure can be mounted to a Flexible Configuration Blocks with Internal Signal surface or panel, or mounted to a nominal DN50 or Routing 2 in pipe. Fully Interactive Display Configuration and Display of an Independent FEATURES Variable Two Independent PID Controllers Pulse Driven Input Single Station Cascade Control RS-485 Serial Communications for Operation Single Station Auto Selector Control and Configuration Split Range Outputs Nonvolatile Memory Ratio Control Transportable Configuration Batch (Discontinuous) Control Power Failure Recovery Logic Totalization Front Panel Keypad for Both Configuration and 3-Variable Indicators Operator Interface Auto/Manual Transfer Stations Internal Signal Sources for Calibration Assignable Alarms Integral Field Power Supply Algebraic Computation Passcode Security Dynamic Compensation with Lead/Lag, Impulse, and Dead Time Functions ® PSS 2C-1A9 B Page 2 TWO INDEPENDENT CONTROLLERS EXACT CONTROL Two completely independent control strategies can be EXACT control uses microprocessor technology to used. All control support functions are available for make ongoing controller adjustments based on the both loops, thereby allowing high-performance, actual, real time process dynamics. This is in direct enhanced control of each loop. contrast to other “self-tuning” controllers that establish the values of tuning parameters based on an arbitrary CASCADE CONTROL process model. With this controller configuration, the output of one of While continuously scanning the process variables, the controllers (primary controller) drives the set point EXACT control initiates corrective action upon of the other (secondary) controller. This configuration sensing a process upset. The user selects the can improve the performance of certain control loops desired response by specifying the desired damping where load disturbances are a factor. and overshoot-to-load change, such as quarter amplitude damping. AUTO SELECTOR CONTROL Values of EXACT can be read by the user. Two controllers with a single selected output are combined in this configuration to provide constraint EXACT control functions as if your best operator is on control or dual mode control. The choice of lower, the job 24 hours a day. It can be turned on or off at higher, or logic-selected output is configurable. The the keypad or by configuring logic functions, allowing inherent design prevents controller windup and offers these controllers to function as advanced PID independent or interlocked auto/manual functions. controllers. EXACT control is available on both control loops. SPLIT RANGE OUTPUTS The two 4-20 mA outputs can be driven from a single 3-VARIABLE INDICATOR controller. This allows one measured variable to be Up to two 3-variable indicator faceplates are controlled by two manipulated variables. A typical available. Each variable has its own bargraph, digital application is a temperature control system in which engineering units, and loop tag. The 3-variable both the heating medium and the cooling medium are faceplates are mutually exclusive with controllers and manipulated. auto/manual stations. If only one controller or manual station is configured, one 3-variable faceplate will be ACTUAL OUTPUT INDICATION available. The output bargraph and digital indicator can be configured to display the actual 4-20 mA output value, AUTO/MANUAL TRANSFER STATION or any analog signal, such as valve position Up to two auto/manual stations are available. feedback. Auto/manual stations are mutually exclusive with controllers and indicators. For example, if only one TOTALIZERS indicator or manual station is configured, one Up to two 7-digit totalizers are available. The auto/manual station will be available. totalizers can be set to integrate up to a preset value or down from a preset value, and produce a logic PULSE DRIVEN INPUT event output. Any internal or external signal can be There is provision for two pulse inputs, forming a totalized. pulse up/pulse down pair that can be assigned to any Totalization and EXACT tuning are mutually scaled signal such as remote set point. This function exclusive. For example, if one controller is configured is compatible with the signals used for older stepping for EXACT tuning, only one totalizer is available. motor type devices. PSS 2C-1A9 B Page 3 RS-485 SERIAL COMMUNICATIONS INTERFACE COMPLETE SECURITY This controller is equipped with an RS-485 serial port The operator has keypad access to read the values of for communication with most host computers, either inputs, alarm and limit settings, and the operating directly or via an RS-232/RS-485 converter or configuration. However, the operator can adjust only equivalent accessory. Protocol conforms to ANSI those settings which were specified as operator- Specification X3.28-1976, Subcategory E3. Using the adjustable when the controller was configured. A Foxboro Model F6501A converter, up to 90 passcode must be entered from the keypad to enable controllers can be accommodated with a single host adjustment of the remaining parameters. In addition, communication port. a keypad disable jumper, accessible from inside the tamper resistant enclosure, is provided. Serial communications capability includes uploading/downloading of configuration, setting of This passcode is determined by an authorized person Auto/Manual (A/M) or Remote/Local (R/L) status and at the time the controller is configured. Thus, only manual output and local setpoint values, polling of all those who have been given this passcode can inputs, outputs, and totalizers, and writing as well as change any of the protected parameters. reading of all configurable parameters. Both control BOOLEAN LOGIC CAPABILITY loops are accommodated. The user can also select There are five single gates and five dual gates. Each parity, and panel, workstation (host), or “both” priority. gate is configured by selecting the logic and then COMPUTATIONAL CAPABILITY selecting the source of each input. Gates 0 through 4 This controller performs up to three independent are the single input gates and are configured DIRECT calculations. The variables may include the results of or NOT by the user. Gates 5 through 9 are the dual other calculation blocks, scaled and conditioned input gates and the user selects one of the following inputs, and other internal control signals. logic types for each one: OR, NOR, AND, NAND, XOR, or XNOR. An equation is entered from the keypad one character at a time following the usual rules of algebra and a DYNAMIC COMPENSATION few easy-to-learn rules. The result of this flexibility is The result of a dedicated calculation block can be exceptional computational capability in a single passed through a dynamic compensator, prior to station controller. distribution. The dynamic compensator provides lead/lag, impulse, and dead time functions, each with SIMPLIFIED CONFIGURATION AND OPERATION its individual follow (bypass) switch. Functionally, Because of its flexibility, this controller is easily dead time precedes lead/lag and is the input to the configured to meet the most exacting process lead/lag function. requirements. All operating functions are examined and/or changed by keystrokes. Interactive prompting Utilizing the dynamic compensator and the follow simplifies setting the adjustable parameters. switches, feedforward and other complex control applications are easily and efficiently handled. PSS 2C-1A9 B Page 4 FRONT PANEL bottom. The bars are 55.4 mm (2.18 in) long. The left and center bargraphs are 5 mm (0.196 in) wide, and The controller can be configured and operated the right bar graph is narrower at 2.5 mm (0.098 in). entirely from the front panel without need for any The bargraphs are colored Blue-Green. external equipment. The panel consists of an alphanumeric display, a graphics display, status The status characters (W/P, R/L, A/M) are 4 mm indicators, an alarm indicator (horn symbol), and a (0.157 in) high; the alarm symbol is 5 mm (0.196 in) keypad. Refer to Figure 1. high. The status characters are colored Blue-Green; the alarm symbol is Red. The alphanumeric display at the top of the front panel has two lines of nine characters each. The characters The keypad has eight keys as shown in Figure 1 and are 5 mm (0.196 in) high, and colored Blue-Green. identified in Table 1 on Page 5. The key switches are single pole, normally open contacts, all closing to a The graphics display consists of three bargraghs, common lead. each having 50 segments plus a pointer on top and Figure 1. Controller Front Panel PSS 2C-1A9 B Page 5 COPY MEMORY FEATURE configured NOVRAM and a second NOVRAM (to be configured) into the copy accessory; then turn on the This optional copy memory feature permits the power and the second NOVRAM is copied for use in configuration of one controller to be duplicated for use another controller. With minimum effort, any number in another controller. This is accomplished using two of controllers can thus be configured with the same NOVRAMs (nonvolatile, random access memory parameter values as the original controller. Then modules) and a configuration copy accessory. Briefly, individual parameters in each controller are easily after turning off the power, the procedure is as changed to fit the particular loop. follows: remove the configured NOVRAM from the controller; install the copy accessory; plug the Table 1. Keypad Description Key Name Usage of Key Depression when the Controller is in the PANEL (P) mode, causes the Controller to exit from the operator FACEPLATE and enter the READ or SET menu. When the Controller is in the WORKSTATION (W) mode, the TAG is disabled. In FACEPLATE mode, if an alarm has not been acknowledged, depression of the ACK key will remove the alarm from the Alarm indicator flashing queue and put alarm into the Alarm indicator steady queue. In READ or SET mode, depression of this key accepts an entry, stores a variable, and/or steps forward to the next function. ACK is functional whether in W or P mode. In FACEPLATE mode: Short Depression (0.1 to < 0.3 s): Moves through variables being displayed on bargraphs, displaying each, in turn, on lower alphanumeric display. Also provides access to remote set point, ratio, and totalized count, provided these have been configured. Long Depression (≥0.3 s): Toggles between faceplates of the two controllers, indicators, and auto/manual stations, provided they are configured and active. Otherwise, same action as if it were a Short Depression. In READ or SET mode, depression steps backward to the previous function. The SEL key is independent of whether Controller is in W or P mode. Controller Status Switch; toggles between Workstation (W) and Panel (P) operation. This key is functional only when Workstation/Panel is configured and the W/P switch is configured to NONE. It is non-functional when the controller is configured for “W” priority. Controller Status Switch; toggles between Auto (A) and Manual (M) operation. This key is functional only when the A/M switch is configured to “NONE”. It is non-functional when Controller is in “W” mode. The bargraph pointer indicator will automatically preselect the Output Bargraph when transferring to “M”, and the Measurement Bargraph when transferring to “A”. Controller Status Switch; toggles between Remote or Ratio (R) and Local (L) setpoint operation. This key is functional only when remote set point is configured and R/L switch is configured to “NONE”. The key is non-functional when Controller is in “W” mode. Up and Down arrows are bidirectional movement requestors. They are used to select menu items and functions, reconfigure parameters, and make changes to the set point and the manual output value. PSS 2C-1A9 B Page 6 OPERATING AND STORAGE CONDITIONS Reference Operating Normal Operating Transportation and Influence Conditions Condition Limits Operative Limits Storage Limits Ambient 23 ±2°C –10 and +60°C –10 and +60°C(a) –40 and +70°C Temperature (73 ±3°F) (14 and 140°F) (14 and 140°F)(a) (–40 and +158°F) Relative 50 ±10% 5 and 95% 5 and 95% 0 and 100% Humidity Supply 24, 120, 220 and V ac, +10, –15% V ac, +15, –20% — Voltage 240 V ac, ±1% V dc, +10, –15% V dc, +10, –15% — 24 V dc, ±1% Supply 50/60 Hz, ±0.1 Hz 50/60 Hz, ±3 Hz 40 and 65 Hz — Frequency 2 Vibration Negligible 5 and 500 Hz — 10 m/s (1 “g”) at an acceleration for 1 hour when in 2 of 10 m/s (1 “g”) shipping container Mechanical Negligible —— A 36 inch drop when Shock in shipping container. (a) Lower operative limit extends to –20°C (–4°F) with enclosure heater option. PERFORMANCE SPECIFICATIONS Accuracy at Numeric Display Output Noise See the table below. 0.25% maximum, peak-to-peak. Numeric Display Accuracy Table Humidity Effect Maximum error in any conversion, calculation, or Parameter Accuracy setting is ±0.1% of span for a change from reference Set Point ±0.1% of span conditions to 95% R.H. at 30°C (85°F) wet bulb. Input Ambient Temperature Effect Analog ±0.1% of span Maximum error in percent of span, except as noted, RTD (Direct Meas.) ±0.5°C for a 30°C (55°F) change in temperature within normal operating limits. See table below. Output ±0.5% of span Parameter Maximum Error Linearization RTD ±0.5°C, reading only Set Point Thermocouple ±0.5°C, reading only Local less than 0.1% Remote less than 0.5% Resolution Input DISPLAY Analog less than 0.5% ±0.1% of upper range value Frequency less than 0.25% BARGRAPH RTD less than 0.5°C ±2% of upper range value Outputs Less than 0.5% Frequency Response Analog input to output conversion is flat to 3 Hz. Supply Voltage Effect ±0.1% of span (maximum) for a +10% or –15% change in ac or dc voltage within normal operating conditions. PSS 2C-1A9 B Page 7 FUNCTIONAL SPECIFICATIONS Proportional Input Signals Any combination of the following proportional inputs; not to exceed four analog (4-20 mA, 1-5 V, TC, or RTD) and two frequency inputs. All input signals are converted ten times per second and can be characterized or combined in a variety of calculations. See table below. Proportional Type Input Maximum Signal Number Details 4 to 20 mA dc Current Input 4 4 to 20 mA dc input is standard. Inputs are across 250 O resistors located inside housing. 1 to 5 V dc Voltage Input 4 Controllers will accept 1 to 5 V dc by removing the input resistor(s) used with the current input. Thermocouple Input 4 Linearization of displayed value is provided, as follows: (requires 893 Temperature Thermocouple Temperature Range Transmitter, or equivalent) Type J –20 to +760°C (–4 to +1400°F) Type K –20 to +1380°C (–4 to +2500°F) Type E –130 to +540°C (–200 to +1000°F) 1 to 9999 Hz 2 Input pulse rates, voltage levels, and field power are compatible Frequency Input with Foxboro E83 Series Vortex Flowmeter, and with Foxboro 81 and 82 Series Turbine Flowmeter having a preamplifier input. Input impedance is 250 O. 1 to 9999 Hz Pulse Up/ 1 Pair 1 to 9999 Hz pulse up/pulse down pair of inputs driven by external Pulse Down Inputs (Uses contact closure or voltage pulse. Contact closure/open times and both Frequency Inputs.) pulse voltage level are compatible with older stepping motor devices. Resistance Temperature 1 Platinum, per IEC 100 or SAMA* 100 (RC 21-4) temperature Detector (RTD) Input, curves. Linearization of displayed value is provided, as follows: Direct or Temperature IEC 100 SAMA 100 Difference Measurement. Range –200 to +850°C –200 to +600°C See Model Code section to (–330 to +1560°F) (–330 to +1100°F) select this optional RTD Span 110 to 1000°C 110 to 800°C input. (198 to 1800°F) (198 to 1440°F) *Scientific Apparatus Makers Association. Output Signals TWO NONISOLATED ANALOG OUTPUTS Two Discrete Inputs Output One: 4 to 20 mA nominal into 500Ω Two nonisolated contact or transistor switch inputs, maximum; isolation provided as an option. 5 V dc nominal open circuit voltage, 1 mA maxi-mum Output Two: 4 to 20 mA nominal into 500Ω current. For remote status changes such as A/M, maximum, or 1 to 5 V dc nominal into 2 kΩ R/L, W/P, EXT ACK, and tracking functions. minimum, jumper selectable. Can be assigned by Control Functions user for control, measurement, set point, or Within this station are two independent controllers conditioned input signals. with individual built-in options that can be TWO DISCRETE OUTPUTS configured. This station is also user-configurable to Two nonisolated open collector transistor (NPN) function as a single controller, cascade controllers, switch outputs. For status indication of A/M, R/L, or an auto selector. W/P, and alarms, or can be configured as the For each controller, the standard algorithms are P, I, destination for any two of the Boolean Gate Inputs. PD, PI, PID, and EXACT control. The following Contact ratings are 50 V dc maximum, 250 mA options may be configured: nonlinear extender, ratio, maximum. Leakage current is 100 µA maximum. measurement and set point tracking, output tracking, remote/local set point, output multiplication or summing, external reset, external limits for output, and simple batch control. PSS 2C-1A9 B Page 8 Other Control Functions Toggle Mode Input bias, gain, and output bias available for Configuring the TOGGLE mode allows a user to every input. toggle (switch) between a menu level and the Characterizers (two available, 8 segments each, normal front panel display with a single keystroke. assignable). Dynamic Compensation Boolean Gate Logic {DIRECT and NOT (single The result of CALC 3 may be passed through the input); OR, NOR, AND, NAND, XOR, and XNOR dynamic compensator function prior to distribution. (dual input); 18 function switches. Inputs This block provides lead/lag, impulse, and dead time selectable from contact inputs, alarm output functions, each with its individual follow switch. states, status indicator outputs, EXACT state, Functionally, dead time precedes lead/lag and is the gate outputs, and three fixed states.} input to the lead/lag function. Signal Conditioning (square, square root, Dead time allows the input to CALC 3 to be delayed characterizer). by a configured time before making it available to Split range outputs (configurable for both the output of CALC 3. The lead/lag function allows 4-20 mA outputs) the output to dynamically lead or lag the input by a Alarms configured time. Both functions can be enabled or Four dual-level alarms, each with a dead band and by-passed selectively utilizing the follow switches. one Boolean output are available. Each alarm is The impulse can be positive, negative, or bi-polar configurable for Absolute, Deviation, Rate-of- and is part of the lead/lag function. Change, High/Low, High/High, Low/Low, Latching, Dynamic Compensation Adjustment Limits Nonlatching, or Permissive. Each alarm can be DEAD TIME configured to act on any one of a number of user- 0 and 200 minutes selected points. LEAD/LAG TIME Can be configured to indicate alarm status by a 0 and 200 minutes combination of alphanumeric display, the bar graphs, an alarm symbol, and the contact Memory outputs. All configuration and operating parameters (not The alarm dead band is adjustable between 0 status data) are stored in a nonvolatile RAM device and 100% of span. having a ten year data retention capability. Should a power failure occur, essential control settings and Calculations last operating conditions are saved indefinitely. No There are three calculation functions, designated batteries are used. CALC 1, CALC 2, and CALC 3. The variables in each calculation can be any combination of direct Input Filter inputs to the controller, configured constants, and Second order Butterworth filter. Adjustable from 0 to results of other calculation blocks. The available 10 minutes in 0.01 minute intervals. operators are +, –, /, *, >, <, ÷, √ and ten Boolean gates. Open and close brackets are also available Signal Distribution for grouping variables. Over thirty signals are available for internal routing. These are the conditioned and scaled inputs, Transmitter Power Supply unconditioned inputs, control inputs and outputs, Nominal 28 V dc power supply with a 250Ω limiting and calculation results. resistor at each transmitter connection. Provides field power for two 4 to 20 mA transmitters with a Power Consumption maximum series resistance of 350Ω in each current 15 VA maximum with 4 to 20 mA output; 27 VA loop, including the 250Ω input resistor. maximum with optional enclosure heater Execution Rate Power On/Off Switch Ten times per second. A rocker type ON/OFF power switch is provided within the enclosure. PSS 2C-1A9 B Page 9 PHYSICAL SPECIFICATIONS Enclosure Display The case is a glass fiber reinforced polyester Vacuum fluorescent lamps in glass enclosure having molding, compounded for superior corrosion a glass frit seal and tin plated copper pin outs. Horn resistance. The door is glass fiber reinforced, symbol (for alarms) is Red, and bargraphs and modified polyphenylene oxide. The overall alphanumeric characters are Blue/Green. construction meets IEC IP66, and provides the Electronic Packaging environmental and corrosion resistant protection of The electronic circuitry is mounted on two 1.6 mm NEMA Type 4X. (0.062 in) thick, glass-based epoxy, wiring boards. Electrical Connections These electronic printed wiring assemblies (PWA's) Electrical conduit holes, located on bottom of are interconnected using 20-pin connectors. enclosure, accommodate 1/2-in conduit (see Mounting “Dimensions - Nominal” section). User signal wires, 2 Enclosure can be mounted to a panel, to a flat with a maximum size of #14 AWG (2.50 mm ), are surface, or to a DN50 or 2 in pipe. For enclosure and terminated at a 32-terminal block at the lower rear mounting dimensions, see “Dimensions-Nominal” surface of the case. Power wires, ranging in size 2 section. from #22 to #12 AWG (0.5 to 4 mm ), terminate at a 3-terminal block (having a protective cover) at the Approximate Mass bottom of the case. 6.4 kg (14 lb) Keypad The sealed contacts are stainless steel snap domes trapped between an upper and lower silver contact. Overlay colors are Red for ACK; Blue for ↑, ↓, and SEL; Light Gray for W/P, R/L, and A/M; Gray for TAG; and Black for background. PSS 2C-1A9 B Page 10 PRODUCT SAFETY SPECIFICATIONS Electrical Classification (See Note Below) Testing Laboratory, Types of Electrical Certification Protection, and Area Classification Conditions of Certification Specification CSA: Certified for use in ordinary (non- – CS–E/CGZ hazardous) locations. CSA: Suitable for Class I, Groups A, B, Without Enclosure Heater: CS–E/CNZ C, and D, Division 2 hazardous Temperature Code T4. locations. With Enclosure Heater, Optional Code “–3”: Temperature Code T3. CS–E/FNZ FM: Nonincendive for Class I, Groups Not available with enclosure heater, A, B, C, and D, Division 2 hazardous Optional Code “–3”. Temperature locations. Code T4. NOTE These Controllers have been designed to meet the electrical classifications listed in the table above. For detailed information or status of the Agency approvals, contact Foxboro. MODEL CODE Description Model Enhanced FIELD STATION MICRO Controller 743CB Nominal Supply Voltage and Frequency 120 V ac, 50/60 Hz –A 220 V ac, 50/60 Hz –B 240 V ac, 50/60 Hz –C 24 V dc –D 24 V ac, 50/60 Hz –E 100 V ac, 50/60 Hz –J Mounting Pipe Mounting F Panel or Surface Mounting P Optional Selections Output Isolation, 4 to 20 mA (Output 1 only) –1 Platinum RTD Input(a) (Input 1 only) –2 Enclosure Heater (Not Available with 743CB–D, 24 V dc Supply) Required for Operating –3 Temperature below –10°C (+14°F) down to a lower limit of –20°C (–4°F) Examples: 743CB–AP, 743CB–BF–2, 743CB–AF–123 (a) Minimum span with platinum RTD input is 110°C (198°F). PSS 2C-1A9 B Page 11 OPTIONAL FEATURES AND ACCESSORIES Output Isolation Surge Suppressor This option provides an isolated 4 to 20 mA nominal A surge suppressor is optionally available for use signal (500Ω load maximum) on output number 1. with serial communication input when external wiring Select Model Code Optional Suffix “–1”. is located near transient producing sources such as meters, solenoids, high voltages, etc. Specify Platinum RTD Input Auxiliary Specification (AS) SURSUP. This option provides for accepting a platinum RTD on input number 1. Calibrated per IEC 100 or Factory Pre-Configuration SAMA 100 temperature curves. Each curve is Unless otherwise specified, the controller is shipped linearized for digital readout over the ranges and with a Factory Default configuration consisting of a spans listed below: single measurement input, a local set point, PID IEC 100 (Direct or ΔT Measurement) EXACT control with EXACT turned off, and scale ranges of 0 to 100 percent. Range: –200 to +805°C (–330 to +1560°F) Optional Factory Configurations are shown in Span: 110 to 1000°C (198 to 1800°F) Table 2. Because the controller is so powerful and SAMA 100 (Direct or ΔT Measurement) virtually offers an unlimited number of solutions, only Range: –200 to +600°C (–330 to +1100°F) some of the more common basic applications are listed. Select the configuration that most closely Span: 110 to 800°C (198 to 1440°F) meets your needs. Any changes necessary to meet Specify by selecting Model Code Optional your specific needs can easily be made in the field. It Suffix “–2”. usually will be necessary to change, at minimum, the Configuration Copy Accessory loop tag, the scale ranges, and the PID controller All of the operating configuration is stored in a turning parameters to suit process requirements. NOVRAM. The copy accessory permits the entire Optional factory pre-configuration is offered without contents of the memory module to be quickly additional charge. To order, refer to Table 2 and copied to another NOVRAM, either a spare or one specify the Auxiliary Specification (AS) for the from another controller. Specify Part Number configuration that most nearly meets your needs. L0122TU for the copy accessory, and Part Number The AS will be displayed in the loop tag to assist in L0122RJ for a spare NOVRAM. initial field identification. Enclosure Heater A thermostatically controlled enclosure heater option is required when operating at ambient temperatures below –10°C (+14°F). By using the heater, operation of the controller is extended down to -20°C (–4°F). This heater is not available with the 24 V dc supply (743CB–D). Specify by selecting Model Code Optional Suffix “–3”. PSS 2C-1A9 B Page 12 Table 2. Factory Pre-Configuration Options AS(a) Description Reference Single Loop Controller SINGL C with Hi/Lo Measurement Alarm SINGL C1 with One Totalizer SINGL C2 with Hi/Lo Alarm and Totalizer SINGL C3 with Split Range Outputs SINGL C4 with 3-Variable Indicator Station SINGL C5 with Auto/Manual Transfer Station SINGL C6 Dual Loop Controller DUAL C with Hi/Low Measurement Alarms DUAL C1 with two Totalizers DUAL C2 with Alarms and Totalizers DUAL C3 3-Variable Indicator Station IND S with three Hi/Lo Alarms IND S1 with two Totalizers IND S2 with Alarms and Totalizers IND S3 with second 3-Variable Indicator Station IND S4 with second 3-Variable Indicator Station, Hi/Low Alarms and Totalizers IND S5 with Auto/Manual Transfer Station IND S6 Auto/Manual Transfer Station A/M S with Hi/Low Alarm A/M S1 with Totalizer A/M S2 with Alarm and Totalizer A/M S3 with second Auto/Manual Transfer Station A/M S4 with second Auto/Manual Transfer Station, Hi/Low Alarms and Totalizers A/M S5 with Split Range Outputs A/M S6 Single Loop Flow Ratio Controller, 0 to 2 Ratio Range, Square Root Inputs RATIO C with Hi/Low Alarm RATIO C1 with one Totalizer RATIO C2 with Hi/Low Alarm and Totalizer RATIO C3 with Split Range Outputs RATIO C4 with 3-Variable Indicator Station RATIO C5 with Auto/Manual Transfer Station RATIO C6 Cascade Controller CASCDE C with Hi/Low Primary Alarm CASCDE C1 with one Totalizer CASCDE C2 with Hi/Low Alarm and Totalizer CASCDE C3 Auto Selector Controller, Low Select A SEL C with Hi/Low Alarms A SEL C1 with Totalizer A SEL C2 with Alarms and Totalizer A SEL C3 with High Select A SEL C4 Single Loop Controller with Pulse- or contact-driven Set Point PULSE SP Single Loop Controller with Output Freeze from External Contact Input 1 FREEZE Single Loop Controller with Output Switching to a Preset Value from External Contact input 1 PRESET (a)Auxiliary Specification PSS 2C-1A9 B Page 13 ORDERING INSTRUCTIONS 1. Model Number 2. Electrical Classification 3. Optional Features 4. Accessories 5. Optional Factory Pre-Configuration 6. User Tag Data PSS 2C-1A9 B Page 14 DIMENSIONS – NOMINAL PSS 2C-1A9 B Page 15 DIMENSIONS – NOMINAL (Cont.) PSS 2C-1A9 B Page 16 PATENT NOTICE This product and its components are protected by one or more of the following U.S. Patents, and other patents pending: 4, 616, 332; 4, 658, 348; 4, 704, 676; RE 33267; and corresponding foreign patents. The Foxboro Company Foxboro, FIELD STATION MICRO, and EXACT are trademarks of The Foxboro Company. 33 Commercial Street Invensys is a trademark of Invensys plc. Foxboro, MA 02035-2099 All other brand names may be trademarks of their respective companies. United States of America http://www.foxboro.com Inside U.S.: 1-888-FOXBORO (1-888-369-2676) Outside U.S.: Contact your local Foxboro representative. Copyright 1994 The Foxboro Company Facsimile (508) 549-4492 All rights reserved An Invensys company MB 010 Printed in U.S.A. 1294