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65-2660XL-XX-04 M2A-XL Transmitter Operator’s Manual

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Chapter 7: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Calibration Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Determining Response Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Replacing the IR CO

2

Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Chapter 8: RS-485 Modbus Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Wiring the M2A-XL in a Modbus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Using the M2A-XL in a 4-wire Modbus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Modbus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Supported Modbus Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Chapter 9: Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Appendix A: Control Button Quick Reference Guide . . . . . . . . . . . . . . . . . . . . 56

Appendix B: PLC and DCS Device Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Appendix C: Function Code 16 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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Содержание 65-2660RK-01-04

Страница 1: ...RKI Instruments Inc www rkiinstruments com 65 2660XL XX 04 M2A XL Transmitter Operator s Manual Part Number 71 0621 Revision P1 Released 12 15 22...

Страница 2: ...th Periodic calibration and maintenance of the gas monitor is essential for proper operation and correct readings Please calibrate and maintain this instrument regularly Frequency of calibration depen...

Страница 3: ...nty indicates the full extent of our liability and we are not responsible for removal or replacement costs local repair costs transportation costs or contingent expenses incurred without our prior app...

Страница 4: ...8 Internal Description 10 Chapter 3 Installation Startup 15 Overview 15 Mounting the M2A XL Transmitter 15 Wiring the M2A XL Transmitter 17 Start Up 21 Chapter 4 Operation 23 Overview 23 Normal Opera...

Страница 5: ...e 39 Calibration 39 Replacing the IR CO2 Detector 43 Chapter 8 RS 485 Modbus Output 44 Overview 44 Wiring the M2A XL in a Modbus System 44 Using the M2A XL in a 4 wire Modbus System 48 Modbus Mode 48...

Страница 6: ...isplay which is visible through the window in the cover front face and provides a 4 20 mA signal which indicates the target gas reading for use by a gas monitoring controller recording device or progr...

Страница 7: ...0 ppm 20 ppm 0 01 volume 0 1 volume Alarm 1 2 000 ppm 2 500 ppm 0 50 volume 50 0 volume Alarm 2 5 000 ppm 5 000 ppm 3 00 volume 50 0 volume Construction housing Explosion proof Junction Box NEMA 4X Ar...

Страница 8: ...ended for situations where the detector needs to be installed at an inaccessible location The detector junction box can be installed at the inaccessible location and the M2A XL junction box can be ins...

Страница 9: ...m 3 4 NPT conduit hub A terminal strip is provided for wiring connections and the detector is factory wired to one side of this terminal strip The other side of the terminal strip is for user supplied...

Страница 10: ...can be performed Internal Description This section describes the internal components of the M2A XL The internal components of the M2A XL include the terminal PCB which provides for all the wiring con...

Страница 11: ...sists of the relay terminal strips A 20 position connector at the bottom of the terminal PCB is used to connect the terminal PCB to the control PCB with a ribbon cable A 5 position connector on the le...

Страница 12: ...e fail alarm 1 and alarm 2 relay terminal strips They are three position plug in style terminal strips The relay terminal strips are used to connect devices such as lights and horns that are controlle...

Страница 13: ...indicates the current gas reading and displays messages and parameters in the M2A XL s programs Control Buttons The M2A XL includes three push button switches that allow you to enter the M2A XL s ope...

Страница 14: ...4 Fail LED The fail LED turns on when the M2A XL is experiencing a fail condition A fail condition can be caused by a detector failure or low detector signal Alarm 1 LED The alarm 1 LED is on when the...

Страница 15: ...erform start up maintenance and calibration procedures The site should be easily accessible Mount the detector junction box near the floor where CO2 is likely to be found first The junction boxes shou...

Страница 16: ...flexible polyurethane tubing to the fitting at the bottom of the calibration adapter splash guard and route it to an accessible area that is close to the M2A XL junction box See the Chapter 9 Parts Li...

Страница 17: ...ation of the junction boxes conduit seals must be installed as shown in Figure 7 Adhere to your local electrical code when installing the conduit seal 8 Guide a four conductor shielded cable or four w...

Страница 18: ...e wire to the LEL W terminal Connect the wire corresponding to the detector s green wire to the LEL G terminal Connect the wire corresponding to the detector s black wire to the LEL B terminal CAUTION...

Страница 19: ...whether the M2A XL is wired to a gas monitoring controller or just to power whether any relays are used and whether the Modbus output is used WARNING If the top conduit hub is used for wiring be sure...

Страница 20: ...t on page 44 See Figure 8 below for field wiring connections to the M2A XL Figure 8 Wiring the M2A XL Junction Box to a Controller and Alarm Devices 3 Re install the control PCB and ribbon cable if ne...

Страница 21: ...s Inc it is factory calibrated If a full calibration is desired at startup see Calibration on page 39 Since there is a background of CO2 in air of typically 300 600 ppm 0 03 0 06 volume it is necessar...

Страница 22: ...djust If you want to exit Calibration Mode press and release the DOWN NO button The M2A XL will indicate Leaving CAL Mode and the M2A XL will return to normal operation 3 To continue with adjusting th...

Страница 23: ...eading in a fresh air environment The high range detectors 0 50 volume and 0 100 volume detectors will not display a reading in fresh air Information Screen The Information Screen displays the M2A XL...

Страница 24: ...Mode Gas Type Mode or Modbus Mode the signal output will be fixed at 3 5 mA until the M2A XL returns to normal operation If the M2A XL s input power decreases below 18 5 volts so that the M2A XL is i...

Страница 25: ...alarm 1 setpoint press the ENTER button to reset the alarm 1 circuit Resetting the alarm 1 circuit turns off the A1 LED resets the OLED display and de energizes the alarm 1 relay NOTE If the ENTER but...

Страница 26: ...the ENTER button to reset the alarm circuit Resetting the alarm circuit turns off the A2 light resets the OLED display and de energizes the alarm 2 relay NOTE If the ENTER button is pressed while the...

Страница 27: ...nput voltage is displayed on the bottom line of the OLED display The fail relay de energizes NOTE The low power alarm cannot be cleared using the ENTER button When the voltage increases to 10 0 volts...

Страница 28: ...YES and ENTER buttons for 5 seconds to enter Configuration Mode Release the buttons when the following screen appears 2 If you want to exit Configuration Mode press and release the DOWN NO button and...

Страница 29: ...1 OffDy alarm 1 off delay 0 sec The amount of time the M2A XL delays turning off the alarm 1 circuit once an alarm 1 condition passes This parameter appears only if the alarm 1 relay reset setting is...

Страница 30: ...ding of 0 0 for gas readings from 1 0 volume to 1 0 volume The zero suppression is settable from 0 to 6 of the detection range FILTER 5 secs The filter feature helps smooth out jumpy or noisy signals...

Страница 31: ...YES button to return to normal operation If you wish to change some of the adjustments made press and release the DOWN NO button The DO OVER YES NO message will display Press and release the UP YES bu...

Страница 32: ...first turned on Selecting the Gas Type 1 While in normal operation or during the warm up sequence press and hold the UP YES and DOWN NO buttons for five seconds Release them when the following screen...

Страница 33: ...e the UP YES and DOWN NO buttons to adjust a setting See Chapter 5 Configuration Mode on page 28 for a complete description of Configuration Mode 7 When you have reviewed and accepted the last item in...

Страница 34: ...YES button for 5 seconds to enter Calibration Mode but since a calibration is required only a momentary push is needed to enter Calibration Mode after changing the gas type 11 See Calibration on page...

Страница 35: ...mmended preventive maintenance schedule to ensure the optimum performance of the M2A XL It includes daily and biannual procedures Daily Verify a display reading at the controller of the background con...

Страница 36: ...the power source or controller is correct and secure 2 Verify that the ribbon cable connecting the terminal PCB to the control PCB is securely installed This ribbon cable plugs into a connector on th...

Страница 37: ...for further instruction Fail Condi tion M2A XL indicates a fail condition Controllerindicates a fail condition The detector wiring to the terminal PCB is disconnected or misconnected The wiring from...

Страница 38: ...nt calibration NOTE See Calibration Frequency on page 38 for calibration frequency guidelines The calibration cylinder is low out dated or defective The calibration gas flow rate is too low The calibr...

Страница 39: ...en starting the gas flow and noticing a reading response 7 Turn the regulator s on off knob clockwise to close the regulator 8 Unscrew the regulator from the calibration cylinder 9 Disconnect the cali...

Страница 40: ...a control switch button touch the magnet in the end of the magnetic wand to the M2A XL s glass cover directly above the magnetic switch you wish to actuate Touching the glass and removing the wand is...

Страница 41: ...YES button ENTER will alternate with FreshAir on the top display line and the current gas reading will be on the bottom display line To skip adjusting the fresh air reading press and release the DOWN...

Страница 42: ...e to display the maximum gas response on the display and retain the response level in its memory 7 Adjust the gas reading up or down to match the calibration gas cylinder concentration by using the UP...

Страница 43: ...e them 5 Unscrew the detector from the detector junction box 6 Guide the detector leads of the replacement detector through the bottom conduit hub of the detector junction box then screw the mounting...

Страница 44: ...nline at www modbus org specs php The Modbus protocol supports a maximum of 247 unique slave addresses 1 247 The M2A XL s line driver provides for up to 128 M2A XLs to be connected together without th...

Страница 45: ...onfiguration 5 wires are used for wiring the M2A XL into a Modbus system Figure 9 also illustrates typical alarm device wiring The ground jumper must be removed in this wiring configuration Figure 9 R...

Страница 46: ...l on the Modbus controller is omitted Instead the Common terminal on the Modbus controller is connected to the of the 24 VDC power supply The ground jumper must be installed in this wiring configurati...

Страница 47: ...mination jumper removed see Figure 11 Figure 12 below Figure 11 Multiple M2A XLs in a Daisy Chain Configuration Figure 12 Multiple M2A XLs in a Two Branch Configuration Modbus Master Up to 128 M2As ca...

Страница 48: ...2A XL automatically returns to normal operation NOTE If the M2A XL returns to normal operation because of a time out it enters a warm up period just as it does when it is first turned on 1 While in no...

Страница 49: ...to normal operation NOTE All M2A XLs on a Modbus network must be configured with the same baud rate and parity and each M2A XL must have a unique slave ID For an M2A XL to participate on a network th...

Страница 50: ...gisters 1 2 is shown below in Table 10 Table 11 Table 10 Register 1 Numerical Reading with Sign Decimal Point Bit Field Assignments Bit s Value Field 15 Sign of Reading 0 Positive 1 Negative 14 13 For...

Страница 51: ...t Asserted 1 Fail Asserted 7 6 Alarm 2 Status 0 No Alarm 1 Unacknowledged Alarm 2 Acknowledged Alarm 3 Unused Code 5 4 Alarm 1 Status 0 No Alarm 1 Unacknowledged Alarm 2 Acknowledged Alarm 3 Unused Co...

Страница 52: ...the same as specified in Register 1 Registers 15 19 Registers 15 19 are the Gas Name ASCII String NULL Terminated Registers 20 22 Registers 20 22 are the Gas Units String NULL Terminated Register 23...

Страница 53: ...conds Register 33 Register 33 is zero suppression Toxics and LEL 0 6 of full scale Oxygen 0 0 7 Oxygen The decimal point location is the same as specified in Register 1 Register 34 Register 34 is nois...

Страница 54: ...er access level 0 None 1 Alarm Reset Function Code 16 Write Registers There are 21 registers in Function Code 16 that can be used to write to the M2A XL This manual only describes Register 16 because...

Страница 55: ...steel 81 0070RK 03 Calibration cylinder 2 000 ppm CO2 in nitrogen 103 liter 81 0071RK 01 Calibration cylinder 5 000 ppm CO2 in nitrogen 34 liter steel 81 0071RK 03 Calibration cylinder 5 000 ppm CO2 i...

Страница 56: ...then press and release the ENTER button to accept the setting Table 14 Control Button Quick Reference Chart Mode Entered or Function Performed Button Combination Adjustable or Viewable Parameters Ala...

Страница 57: ...ence Guide 57 Modbus Mode Press and Hold DOWN NO and ENTER for 5 seconds Enable or Disable Modbus Slave ID Baud Rate Parity Response Delay Table 14 Control Button Quick Reference Chart Mode Entered or...

Страница 58: ...trip If the PWR SIG terminal strip connections and one or more relays are used route the connections to the M2A XL in conduit Use shielded cable in the conduit for the PWR SIG connections and unshield...

Страница 59: ...XL Figure 13 PLC and DCS Device Wiring Alarm Device Power Fail Alarm Device Alarm 1 Alarm Device 24 VDC 24 VDC Power Supply 24 VDC Typical Alarm Wiring Shown 24 VDC 4 20 mA In S Alarm 2 Alarm Device C...

Страница 60: ...Increasing Register 3 Register 3 is the alarm 1 relay state 0 Normally De Energized 1 Normally Energized Register 4 Register 4 is the alarm 1 relay reset 0 Latching 1 Self Resetting Register 5 Regist...

Страница 61: ...seconds Register 13 Register 13 is the zero suppression Toxics and LEL 0 6 Full Scale Oxygen 0 0 7 Oxygen Value must be an integer Any decimals are omitted Register 14 Register 14 is the noise filter...

Страница 62: ...register can be used to clear those flags Table 16 Register 19 Clear Change Flags Register 20 Register 20 is the AutoZero Disable 0 AutoZero Enabled 1 AutoZero Disabled Register 21 Register 21 is the...

Страница 63: ...65 2660XL XX 04 M2A XL Transmitter Appendix C Function Code 16 Registers 63...

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