Convenient Wall-mounted Control System GMC 8420- Brochure

GasmesscomputerGMC 8420from Version 1.0Data SheetOutput ExtensionRK 8420Gas Detection and Warning SystemsPage 2 Technical Status: 11/2010Evaluation SystemsData SheetGMC 8420 / RK 8420Application The controller Gasmesscomputer GMC 8420, in conjunction with detectorsthat supply 4-20 mA output signals, has the following functions:? Measurement and display of the gas concentration? Monitoring these gases and warning of their presence? Triggering protective measures to counter increasing concentration.A gas warning installation consists of the following components:? An evaluation system? A detector? Controllable devices, such as:- fans- solenoid valves- horns- illuminated warning signsSet-upControlerDetectorProduct Features ? Type of installation: wall-mounting? Four measurement channels? Concentration display? Two alarm stages and additional horn output? Microprocessor technology provides numerous functions and simpleoperation? Verification of alarm signal without test gas? Fault monitoring for:- mains failure- computer defect- wire break / short circuit of sensor leads? Potential-free relay outputs for:- 3 freely programmable relays for Alarm 1, Alarm 2, Horn- 1 error message relayEvaluation System GMC 8420Output Extension RK 8420 ? Type of installation: wall-mounting? Optional extension of relay outputs- 4 freely programmable relays for Alarm 1, Alarm 2, Horn Technical Status: 11/2010 Page 3Evaluation SystemsData SheetGMC 8420 / RK 8420How It Works The controller is designed to be connected to up to four gas detectors with4…20 mA signal interfaces. In the event of an alarm, the relay outputs of thecontroller can switch technical safety measures, for example, to close asolenoid valve in a gas supply line. A built-in buzzer provides an acousticalarm.In addition the unit has four built-in DC switches for 32 VDC/ 200 mA, whichcan be used for further switching operations.The Ready LED shows that the controller is ready for use. The Measure LEDindicates each measurement. There are also visual indicators for error, pre-alarm and main alarm for each measurement channel. A fault message (ErrorLED) is given when the signal is outside the measurement range. The ErrorLED also indicates a wire break in the detector leads. LEDs A1 and A2 signalwhen a pre-alarm or main alarm is given. The present reading is shown in thedisplay. The channel number is displayed so that a concentration reading canbe correctly assigned. By briefly pressing the Stop button for any desiredchannel, its reading is continuously displayed. An alarm threshold can befreely assigned to the Horn output which controls an external acoustic deviceand the built-in buzzer.For the control of technical equipment and warning devices there are threefreely programmable output relays (230VAC/4A). These can be programmedwith the messages Alarm 1, Alarm 2 or Horn. A further output relay ispermanently assigned to the Error function.The output extension RK 8420 can be connected at the integral DC switch.This module provides the option of four more freely-programmable outputrelays (230VAC/4A).Parameters can be freely set for each measurement channel:- Alarm threshold for Alarm 1- Alarm threshold for Alarm 2- Alarm when signal is outside measurement range- Alarm latching / non-latching- Zero captureThe system parameterisation is carried out using an RS232 interface. For thisoperation a simple terminal emulator is necessary. As a rule this software isprovided by all operating systems, or it is available on a free licence.Page 4 Technical Status: 11/2010Evaluation SystemsData SheetGMC 8420 / RK 8420Technical Data Number of detectors thatcan be connectedMax. 4 detectorsDetector inputs 4x 4-20 mAExternal reset YesOutputs Potential-free changeover contacts (230 VAC, 4A):- 1x Error- 3x programmable for Alarm 1, Alarm 2, HornPhotoMOS relay (32 VDC, 200 mA)- 4x programmable for Alarm 1, Alarm 2, HornAlarm device Built-in 85dBA signal hornDisplay elements - Display for concentration- Display for channel number- LEDs for Alarm 1, 2, Error, Ready,MeasurementPower supply 100 - 240 VAC, 50 - 60 Hz, 20WEmergency power supply 1x 24VDC emergency power supply inputDistribution terminals For each: 6 terminals for N and PE, 3 for LTemperature range -10°C to +40°CRelative humidity 10 – 95% r.h. (non-condensing)Air pressure 800 – 1200 hPaAmbient conditions - Can be used up to 2000 m above sea level- Protect from direct sunlightStorage conditions -10°C to +70°C10 – 95% r.h. (non-condensing)Degree of protection IP44Housing Wall-mounting plastic housing(240x190x90 mm)Weight 1300 gAnticipated useful life Typically > 8 yearsConnections - Mains connection:cable gland for 7-14 mm dia. cable- Cable entries for sensors and switchedoutputs: double-diaphragm sockets,sealing range 5-9 mmElectrical safety EN61010EMC requirements EN50270 (Type 2)EN61000-6-3ReadyMeasureA3 /ErrorA1A2Channel12 34 ConcentrationChannelStopResetGMC 8420190 mm90 mm240 mmGMC 8420 Technical Status: 11/2010 Page 5Evaluation SystemsData SheetGMC 8420 / RK 8420Outputs Potential-free changeover contacts (230 VAC, 4A):- 4x programmable for Alarm 1, Alarm 2, HornInputs 4 x control inputs from GMC 8420Power supply Power supply from GMC 8420Distribution terminals 6 terminals (L, N, PE) for eachTemperature range -10°C to +40°CRelative humidity 10 – 95% r.h. (non-condensing)Air pressure 800 – 1200 hPaAmbient conditions - Can be used up to 2000 m above sea level- Protect from direct sunlightStorage conditions -10°C to +70°C10 – 95% r.h. (non-condensing)Degree of protection IP44Housing Wall-mounting plastic housing (160x190x90 mm)Weight 750 gAnticipated useful life Typically > 8 yearsConnections 2x cable glands for 7-14 mm dia. cables5x double-diaphragm sockets, sealing range 5-9 mmElectrical safety EN61010EMC requirements EN50270 (Type 2)EN61000-6-3Technical DataRK 8420190 mm90 mm160 mmRK 8420Page 6 Technical Status: 11/2010Evaluation SystemsData SheetGMC 8420 / RK 8420AccessoriesEverything from a single supplier - from system design to installation of yournew gas warning system. This is backed up with comprehensive coverage byour sales and service network. Ask us about regional representatives in yourarea. And after purchase our service technicians are ready and willing to helpand advise.ServiceOur sales representatives and service technicians are always available tohelp solve your measurement and control problems. A wide-rangingprogramme of equipment, housings and accessories combined with decadesof experience enable us to design and install measurement systemsespecially adapted to your applications.Customer-specificInstallationsBieler + Lang GmbHGas Detection and Warning SystemsPO Box 1129, D-77842 AchernOberkirchstr. 19-21, D-77855 AchernTelephone +49 (0) 78 41 / 69 37 - 0Telefax +49 (0) 78 41 / 69 37 - 99E-mail info@bieler-lang.deInternet www.bieler-lang.de We reserve the right to make technical changes? Horns? Warning lights? Solenoid valves? Central emergency power supplies? Connection cables for programming (USB)