Microprocessor-controlled devicesElectronic devicesMechanical devicesDevices in hazardous areasTemperature sensors ___ 120 >

Heating systems in hazardous areas have to meet strict safetyrequirements.As a rule,a fault in the system must never lead to dangerous overheating.It practice this means that the maximumtemperature has to be limited according to the temperatureclass,for example,by providing a thermal cut-out. Therefore,two devices are necessary for operation in hazardous areas:a temperature controller and a thermal cut-out.The temperature controller regulates the desired workingtemperature,while the thermal cut-out will switch off the heating system permanently if the specified maximum temperature is exceeded....

-Two-position controller for two to four separate channels (heating circuits)-Self-optimization algorithm (PID) with separate activation per channel-Easily readable 7-segment LED displayswith 13 mm character size-Display of actual and setpoint values -Clear design of operator control level-Each channel configurable as cut-out for permanent switching off > -All applications requiring high-quality control equipment-Universally suitable for up to four different heating circuits-For example,instead of four individual controllers-Process technology-Machine construction industry-Analytical systems...

Controller seriesOptionsStandard Possible extras WR..96 Logic outputs for triggering solid-state relay instead of control contacts K1 to K4,typically 0/10 V DC,max.20 mAEasy-to-install and easy-to-service pluggable screw connection2 displays for actual and setpoint values Display selection for channel 1 to channel 4 by means of channel selector buttonUpper display:actual value with channel number Lower display:setpoint value without channel number Scan mode:continuous indication of actual and setpoint values Static mode:any 2 actual values with channel numberAdditional relay card with 4 programmable...

TECHNOLOGIES 0.15% of span: 0.1% of span: 100 ppm/K: > 0.15% of span: 0.15% of span: 80 ppm/K: 2 V/Ohm: > Controller seriesFor Pt 100 (two-wire/three-wire technique)For thermocouple For standardized signalStandardized signal of currentStandardized signal of voltage WR..96 Sensor currentCalibration accuracyLinearity errorTemperature drift characteristic Sensor break and short-circuit protection includedCalibration accuracyLinearity error Temperature drift characteristic (without reference junction comp.) Influence of line resistanceReference junction compensationincluded Sensor break and polarity...

Controller seriesGeneralWR..96Measuring cycleResolutionZero point correction RC and diode protection circuitMeasuring circuit monitoringProtective circuitData backupOperating voltageLogic output of currentLogic output of voltageRelay outputs :1 s:> 19 bit:30 K possible via software:optional for each input:Error display:Hardware watchdog and power fail:EEPROM:230V AC ѱ10%,others upon enquiry:Load < 400 Ohm :Resistance Ri500 Ohm (short-circuit proof):Contact loading:< 250 V AC,< 8 A ohmic loadtyp.500 VA at 10 > 6 operating cycles > Controller seriesEmitted interferenceImmunity to interferenceApplicable...

Controller seriesControl behaviourInputsWRX 141 Configurable with PID action or withswitching hysteresis,two and three position control,also for cooling processesPt 100 two-wire or three-wire inputTwo-wire circuit:Line compensation or calibration of safety barriersThree-wire circuit:Automatic line resistance compensationSensor break and short-circuit protectionSensor current Calibration accuracyLinearity errorTemperature drift characteristic 0.15% of span: 0.1% of span: :- 99...600 C:max.50 Ohm per wire :max.50 Ohm per wire :constant 1 mA DC: 100 ppm/K > Control & monitoring ___ 130 >

Controller series Inputs:0...850 C :0...850 аC :0...1200 C :0...1700 аC: WRX 141 ThermocoupleFe-CuNi Type LFe-CuNi Type J NiCr-Ni Type K NiCr-Ni Type SCalibration accuracyLinearity errorTemperature drift characteristic (without reference junction compensation)Influence of line resistance Reference junction compensationError detection at reference junctiontemperature of controllerPolarity reversal protection and zero point correctionSensor break protection 0.15 % of span: 0.15 % of span: 80 ppm/K: 2 V/Ohm:> 70 հC and < 10 ְC > Control & monitoring ___ 131 >

Controller series Inputs:- 999...9999 units: WRX 141Standard signal0...10 V DC2...10 V DC 0...50 mV DC 0...20 mA DC4...20 mA DCCalibration accuracyLinearity errorTemperature drift characteristicInput resistance of current Input resistance of voltagePolarity reversal protection andzero point correctionDisplay range,decimal point 0.15 % of span: 0.1 % of span: 100 ppm/K:Ri= 121 Ohm:Ri> 100 kOhm:Configurable > Control & monitoring ___ 132 >

Controller seriesInputs:500 ms:> 12 Bit:LRC and diode protection circuit for each inputMeasuring circuit monitoring(error display)Protective circuits (hardware watchdog and power fail)EEPROM data backup:Changeover from setpoint value 1 to setpoint value 2Stop function for control outputUnlocking of limit-value contactsProgramming lockout for complete data input WRX 141 Shared dataMeasuring cycleResolutionProtective systems Logic inputExternal potential-free contact,configurable as Installation note:sensor wires must be screened. > Control & monitoring ___ 133 >

Controller series Outputs:Make contact or logic outputs for SSR(typ.0/10 V DC,max.10 mA):< 250 V AC,< 8 A ohmic loadtyp.500 VA at 10 WRX 141Relay outputs2 relay outputs K1 and K2 Contact loading of relay outputs1 logic output1 analogue output (optional)Limit-value contactsWith/without interlock,hysteresis adjustableWith/without interlock,hysteresis fixedElectrical dataOperating voltagePower inputSpecial voltages Fuse protection > 6 operating cycles:typ.0/10V DC,max.10 mA :Resolution 10 BitAbsolute limit valueAbsolute limit value,invertedLimit value linked to setpoint Limit value linked to setpoint,invertedLimit...