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<p>Revised 02/06 1</p> <p>TECHNICAL INFORMATION FOR CDM4161</p> <p>Technical Information for the CDM4161 CO 2 Module</p> <p> PageBasic Information and Specifications</p> <p>Features.....................................................................................................2Applications.............................................................................................2Specifications.....................................................................................2Dimensions..........................................................................................2</p> <p>Structure and functionsSolid electrolyte CO2 sensor TGS4161.....................................................2Sensor's output signal voltage (CP3)........................................................2Variable resistor (VR1)...............................................................................2Thermistor signal output voltage (CP4).................................................2Microcomputer........................................................................................2Concentration setting for system control (JP3, JP4)................................2Baseline reset switch...............................................................................4Input-output signal (CN1)....................................................................4LEDs..........................................................................................................4</p> <p>Operation modesWarm up...............................................................................................5CO2 concentration lower than calibrated concentration.......................5CO2 concetration exceeds calibrated concentration...............................5Trouble..............................................................................................5</p> <p>Cautions...............................................................................................5Important Notice..............................................................................................6</p> <p>an I</p> <p>SO90</p> <p>01 a</p> <p>nd 1</p> <p>4001</p> <p> com</p> <p>pany</p> <p>IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARYWITH EACH CUSTOMERS SPECIFIC APPLICATIONS. FIGARO STRONGLY RECOMMENDSCONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATIONAND, IN PARTICULAR, WHEN CUSTOMERS TARGET GASES ARE NOT LISTED HEREIN. FIGAROCANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT ORAPPLICATION FOR WHICH SENSOR HAS NOT BEEN SPECIFICALLY TESTED BY FIGARO.</p> <p>CDM4161 is a new unit which usesTGS4161, Figaro's low-powerconsumption solid electrolyte CO2sensor. Due to Figaros proprietaryidea for signal processing with amicrocomputer, no maintenance isrequired for this module. Whencompared with traditional CO2sensor modules using IR sensors,Figaros CO2 module is much morecost effective, making this modulethe ideal choice for indoor airquality control systems.</p> <p>Revised 02/06 2</p> <p>TECHNICAL INFORMATION FOR CDM4161</p> <p>1. Basic Information</p> <p>1-1 Features</p> <p>* High selectivity to CO2* Maintenance free* Low power consumption* Long life* Compact size* Pre-calibrated* Low cost</p> <p>1-2 Applications</p> <p>* Indoor air quality control* CO2 monitors</p> <p>1-3 Specifications</p> <p>The specifications of CDM4161 are containedin Table 1. Depending on the customer's targetconcentration range, Figaro offers two versionsof this module as indicated in Table 1.Customized modules are available accordingto special requests from customers. Pleaseconsult with Figaro.</p> <p>1-4 Dimensions (see Fig. 1 below)</p> <p>Fig. 1 - CDM4161 dimensions</p> <p>.oNniP .oNniP .oNniP .oNniP .oNniP emaN emaN emaN emaN emaN noitpircseD noitpircseD noitpircseD noitpircseD noitpircseD</p> <p>1 V NI tupniylppusrewoP</p> <p>2 V CNOC OC 2 tuptuonoitartnecnoc</p> <p>3 LRTC tuptuolangislortnoC</p> <p>4 LBRT tuptuolangiselbuorT</p> <p>5 DNG dnuorgnommoC</p> <p>Table 2 - CDM4161 pin designations of CN1NOTE: CN1 should be MB5P-90S, mfg. by JST.Recommended receptacle for connector: 05JQ-BT, mfg. by JST.</p> <p>u/m: mm</p> <p>2. Structure and Functions</p> <p>2-1 Solid electrolyte CO2 sensor TGS4161</p> <p>The sensor changes its output voltage in response toexposure to CO2 gas. The sensor should not bedirectly connected with low-input impedanceequipment. To read sensor output, amplified voltage(CP3) should be used. Please refer to TGS4161Technical Information for details as to thecharacteristics of the sensor.</p> <p>2-2 Sensor's output signal voltage (CP3)</p> <p>The sensors output can be read as an amplifiedvoltage (as taken from the differential amplifier).Voltage should be read from this port.</p> <p>2-3 Variable resistor (VR1)</p> <p>This resistor is pre-calibrated at Figaros factory priorto shipment. Do not turn the screwif this would bedone, the module may not meet specifications.</p> <p>2-4 Microprocessor</p> <p>The microcomputer takes data and renews it onceper second. The processor calculates CO2concentrations based on the difference betweencurrent sensor output and a baseline value (whichrepresents the sensor output value in fresh air).</p> <p>2-5 Thermistor signal output voltage (CP4)</p> <p>The thermistors output signal voltage, which is usedfor compensation of the sensor s temperaturedependency, can be read at this port.</p> <p>2-6 Concentration setting for control signal (JP3, JP4)</p> <p>Concentrations utilized for control signals (i.e. thecontrol concentration) can be changed by modifying</p> <p>CP3</p> <p>CP5</p> <p>SW1</p> <p>CP4</p> <p>CP2</p> <p>CP1 </p> <p>[+5V]</p> <p>[GND]</p> <p>LE</p> <p>D1</p> <p>LE</p> <p>D2</p> <p>LE</p> <p>D3</p> <p>JP1</p> <p>JP5</p> <p>JP2</p> <p>JP3</p> <p>JP4</p> <p>JP6</p> <p>JP7</p> <p>CN1</p> <p>12345</p> <p>45</p> <p>60</p> <p>+VR1</p> <p>Gas sensor TGS4161</p> <p>3</p> <p>3</p> <p>14 Max t=1.6(mm)</p> <p>3 Max</p> <p>Microprocessor</p> <p>C2</p> <p>3</p> <p>19</p> <p>2.50.64</p> <p>6.9</p> <p>Revised 02/06 3</p> <p>TECHNICAL INFORMATION FOR CDM4161</p> <p>VINVDD</p> <p>VSS</p> <p>6</p> <p>5 4</p> <p>8</p> <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>ConnectorMB5P-90S</p> <p>11</p> <p>7</p> <p>3</p> <p>5</p> <p>4</p> <p>2</p> <p>1</p> <p>6</p> <p>2208</p> <p>9</p> <p>5</p> <p>14</p> <p>D/AConverter</p> <p>VCONC</p> <p>CTRL</p> <p>TRBL</p> <p>GND</p> <p>Microcomputer</p> <p>Fig. 2 - Circuit diagram of interface for circuit</p> <p>Table 1 - Specifications</p> <p>emantcudorP OC(edixoidnobraC 2 eludomrosnes)</p> <p>.oNledoM 00L-1614MDC 00M-1614MDC</p> <p>egnarnoitceteD mpp000,4ot004 mpp000,8ot004</p> <p>)elpicnirp(rosneS )etylortceleetatsdilos(1614SGT</p> <p>)1*(ycaruccA .xorppa elacslluf%02</p> <p>ylppusrewoP 0.5CD detalugerV2.0</p> <p>noitpmusnocrewoP )xaM(Wm003</p> <p>&amp;erutarepmetlanoitarepOegnarytidimuh</p> <p>)noitasnednocdiova(HR%59~5,C05+~01-</p> <p>&amp;erutarepmetegarotSegnarytidimuh</p> <p>)gabfoorperutsiomanikcap(HR%09~5,C06+~02-</p> <p>emitpumraW sruoh2</p> <p>noitartnecnoc2OC)2*(langis</p> <p>OCotlanoitroporptuptuogolanasuounitnoC 2 noitartnecnoc</p> <p>OC=cnocV 2 000,1/noitartnecnoc)elacsllufV4CD(</p> <p>OC=cnocV 2 000,2/noitartnecnoc)elacsllufV4CD(</p> <p>langislortnoC</p> <p>OCnehw(tuptuoHGIH:NO 2 )dlohserhtsdeecxe.cnoctuptuoWOL:FFO</p> <p>)mpp(000,2/005,1/000,1/008 )mpp(000,8/000,5/000,2/000,1</p> <p>langisnoitcnuflaM)noitcnuflamrosnes(tuptuoWOL:NO</p> <p>CNTAOLF:FFO</p> <p>yalpsidDEL</p> <p>)pumrawgnirudsknilb(nosirewopelihwsthgiL:DELneerG</p> <p>elbuortgnirudsknilB:DELwolleY</p> <p>OCnehwsthgiL:DELdeR 2 dlohserhtehtsdeecxenoitartnecnoc</p> <p>hctiwsteseR OCtneibmaehtsehsilbatsE 2 dehsupnehwmpp004sanoitartnecnoc</p> <p>snoisnemiD )1NC.lcnimm91x76x54(mm91x06x54</p> <p>thgieW g71.xorppa</p> <p>Note 1: Assumes benchmark is setaccuractely at 400ppm of CO2. This valuedoes not contain long term drift.Note 2: In this module, the CO2concentration is calculated by measuringthe relative change of sensor output at themeasuring point from sensor output inclean air (assumed to be 400ppm of CO2).</p> <p>Revised 02/06 4</p> <p>TECHNICAL INFORMATION FOR CDM4161</p> <p>the settings of JP3 and JP4 as shown in Table 3. Themodule is pre-set at Mode I before shipment.</p> <p>2-7 Baseline reset switch</p> <p>The baseline value may be manually reset using thisswitch. When this switch is pushed, the sensorsoutput at that moment is memorized as 400ppm ofCO2 (the baseline value in fresh air). When the switchis pushed during warm-up time (within the first twohours after the module is powered on), the baselinevoltage is read at that moment and the moduleimmediately goes into operation mode.</p> <p>Caution: If the baseline reset switch is pushed whilein a polluted environment where the actual CO2concentration is higher than 400 ppm (ambientlevels), the accuracy of readings may becomeadversely affected.</p> <p>2-8 Input-output signal (CN1)</p> <p>Please refer to Table 4-Rated input and output voltagesfor rated values. Also please refer to Fig. 2-Circuitdiagram of interface for circuit.</p> <p>2-8-1 Vin (Pin No. 1)Regulated voltage should be input into this port. Thesensors output may vary according to the sensorsvoltage dependency characteristics if the inputvoltage fluctuates. Please refer to "TGS4161 TechnicalInformation" for details.</p> <p>2-8-2 Concentration output (Pin No. 2)An analog voltage (CO2 concentration/1000)</p> <p>Table 4 - Rated input/output voltages</p> <p>.oNniP metI muminiM lacipyT mumixaM m/u</p> <p>1 V(tupniylppusrewoP NI ) 5.3 0.5 5.5 V</p> <p>2OC 2 .cnoc</p> <p>tuptuoV( CNOC )</p> <p>egatlovtuptuO 0.0 - V NI V</p> <p>egatlovelbawollA - - 5.5 V</p> <p>3langislortnoC</p> <p>tuptuo)LRTC(</p> <p>)FFO(egatlovtuptuOI LO Am1=</p> <p>- - 2.0 V</p> <p>)NO(egatlovtuptuOI HO Am1=</p> <p>V NI 6.0- - - V</p> <p>egatlovelbawollA - - 5.5 V</p> <p>tnerrucelbawollA - - 52 Am</p> <p>4langiselbuorT</p> <p>tuptuo)LBRT(</p> <p>)NO(egatlovtuptuOIC Am5=</p> <p>- - 3.0 V</p> <p>egatlovelbawollA - - 05 V</p> <p>tnerrucelbawollA - - 001 Am</p> <p>edoM 3PJ 4PJ</p> <p>OCdlohserhT 2 langiSlortnoCfonoitartnecnoC</p> <p>00L-1614MDC 00M-1614MDC</p> <p>NO FFO NO FFO</p> <p>I NEPO NEPO mpp008 mpp027 mpp000,1 mpp009</p> <p>II NEPO TROHS mpp000,1 mpp009 mpp000,2 mpp008,1</p> <p>II TROHS NEPO mpp005,1 mpp053,1 mpp000,5 mpp005,4</p> <p>VI TROHS TROHS mpp000,2 mpp008,1 mpp000,8 mpp002,7</p> <p>Table 3 - CDM4161 jumper pin settings</p> <p>corresponding to CO2 concentration is output fromthis port.</p> <p>2-8-3 Control signal output (Pin No. 3)When CO2 concentrations exceed the controlconcentration, output from this port will be ON.</p> <p>2-8-4 Trouble signal output (Pin No. 4)This port will output ON in the followingsituations:</p> <p>* when the sensors heater is broken* when the connection for control concentration</p> <p> setting is broken</p> <p>2-9 LEDs (refer to Table 5)</p> <p>2-9-1 Green LED (LED 1)The green LED indicates the modules powercondition. It will be lit when the power is on. TheLED blinks on and off during warm-up time (for thefirst two hours after power is turned on).</p> <p>2-9-2 Yellow LED (LED 2)The yellow LED indicates a trouble condition. It</p> <p>Revised 02/06 5</p> <p>TECHNICAL INFORMATION FOR CDM4161</p> <p>noitidnoC DELneerG DELwolleY DELdeRlangislortnoC</p> <p>)LRTC(langiselbuorT</p> <p>)LBRT(</p> <p>OC 2 langisnoitartnecnoc</p> <p>00L-1614MDC 00M-1614MDC</p> <p>doireppumraW FFO/NOknilB FFO FFO FFO FFO V4.0 V2.0</p> <p>OC 2 dlohserhT</p> <p>Revised 02/06 6</p> <p>TECHNICAL INFORMATION FOR CDM4161</p> <p>FIGARO GROUP</p> <p>HEAD OFFICE</p> <p>Figaro Engineering Inc.1-5-11 Senba-nishiMino, Osaka 562-8505 JAPANTel.: (81) 72-728-2561Fax: (81) 72-728-0467email: figaro@figaro.co.jpwww.figaro.co.jp</p> <p>OVERSEAS</p> <p>Figaro USA Inc.3703 West Lake Ave. Suite 203Glenview, IL 60026 USATel.: (1) 847-832-1701Fax.: (1) 847-832-1705email: figarousa@figarosensor.comwww.figarosensor.com</p> <p>without power for a long period of time.</p> <p>5) Please refer to TGS4161 Technical Information forother handling precautions of TGS4161.</p> <p>5. Important Notice</p> <p>Figaro Engineering Inc. (Figaro) reserves the right tomake changes without notice to any products hereinto improve reliability, functioning or design.</p> <p>Information contained in this document is believedto be reliable. However, Figaro does not assume anyliability arising out of the application or use of anyproduct or circuit described herein; neither does itconvey any license under its patent rights, nor therights of others.</p> <p>IMPORTANT NOTEThis product is not designed and authorized for useas a component in life support applications whereina failure or malfunction of the products may resultin injury or threat to life. Figaro Engineering Inc.reserves the right to make changes to this productwithout notice to improve reliability, functioning,and/or design.</p>

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