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RKI Instruments 65-2658XL-CH4-4, Руководство оператора

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Chapter 8: RS-485 Modbus Output

 65-2658XL-CH4-4 M2A-XL Transmitter Operator’s Manual

Termination Jumper

The M2A-XL includes a 2-pin termination header (see Figure 3 on page 11) that is used when the 
M2A-XL is used in a Modbus system. Every M2A-XL is supplied with a termination jumper (a 
jumper block) installed onto this header. If the M2A-XL is not used in a Modbus system, this 
jumper has no function. When the M2A-XL is installed in a Modbus system, this jumper must be 
installed in an M2A-XL that is at the end of a Modbus line. Any M2A-XL in a Modbus system 
that is not at the end of a line must have the termination 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 can be connected without a repeater

RS-485

RS-485

ID = 126

ID = 127

M2A

Termination

Jumper

Not Installed

M2A

Termination

Jumper

Not Installed

ID = 128

M2A

Termination

Jumper

Installed

ID = 125

ID = 1

M2A

Termination

Jumper

Not Installed

M2A

Termination

Jumper

Not Installed

ID = 128

RS-485

M2A

Termination

Jumper

Installed

Modbus

Master

Up to 128 M2As can be connected without a repeater

M2A

Termination

Jumper

Not Installed

M2A

Termination

Jumper

Not Installed

M2A

Termination

Jumper

Not Installed

M2A

Termination

Jumper

Not Installed

ID = 2

ID = 3

RS-485

ID = 1

M2A

Termination

Jumper

Installed

ID = 127

ID = 4

Содержание 65-2658XL-CH4-4

Страница 1: ...RKI Instruments Inc www rkiinstruments com 65 2658XL CH4 4 M2A XL Transmitter Operator s Manual Part Number 71 0622 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 37 Calibration 38 Replacing the IR CH4 Detector 41 Chapter 8 RS 485 Modbus Output 43 Overview 43 Wiring the M2A XL in a Modbus System 43 Using the M2A XL in a 4 wire Modbus System 47 Modbus Mode 47...

Страница 6: ...an OLED display 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...

Страница 7: ...s Alarm Settings Alarm 1 Alarm 2 100 100 Construction housing Explosion proof Junction Box NEMA 4X Area Classification Explosion proof for Class I Groups B C and D Sampling Method Diffusion Input Powe...

Страница 8: ...nded 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 inst...

Страница 9: ...in the bottom 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...

Страница 10: ...libration 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 w...

Страница 11: ...right consists 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...

Страница 12: ...bottom the 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...

Страница 13: ...ons The M2A XL includes three push button switches that allow you to enter the M2A XL s operating modes navigate through the modes update settings and save changes to the settings The push button swit...

Страница 14: ...23 Status LEDs The M2A XL includes five status LEDs that are located above the display see Figure 4 Fail LED The fail LED turns on when the M2A XL is experiencing a fail condition A fail condition ca...

Страница 15: ...edures The site should be easily accessible For the detector junction box select a site where the target gas is likely to be found first For lighter gases mount the detector near the ceiling for heavi...

Страница 16: ...inch I D 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...

Страница 17: ...classification 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...

Страница 18: ...r s white 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...

Страница 19: ...ontroller 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 to seal the threads to ensure water does not ente...

Страница 20: ...bus Output on page 43 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 ca...

Страница 21: ...n page 38 Verify that the M2A XL is in a fresh air environment environment known to be free of combustible or toxic gas vapors and of normal oxygen content 20 9 Non Intrusive Fresh Air Signal Adjustme...

Страница 22: ...ith 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 NO button The display will indica...

Страница 23: ...een The Information Screen displays the M2A XL s operating voltage and firmware and hardware information To display the Information Screen do the following 1 Press and hold the DOWN NO button for 3 se...

Страница 24: ...iguration 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 M2...

Страница 25: ...the 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 ENTE...

Страница 26: ...press 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 whil...

Страница 27: ...and the input 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...

Страница 28: ...Viewing Changing M2A XL Parameters 1 While in normal operation simultaneously press and hold the UP YES and ENTER buttons for 5 seconds to enter Configuration Mode Release the buttons when the follow...

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

Страница 30: ...R 5 secs The filter feature helps smooth out jumpy or noisy signals from the detector You can set the filter from 0 seconds to 60 seconds in 5 sec onds increments The displayed gas reading is the aver...

Страница 31: ...s the UP 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...

Страница 32: ...s 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 scree...

Страница 33: ...xt one Use 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 las...

Страница 34: ...ld the UP 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 Calibratio...

Страница 35: ...ms probable causes and recommended action for problems you may encounter with the M2A XL NOTE This troubleshooting guide describes M2A XL problems only If the M2A XL is connected to a controller see t...

Страница 36: ...is properly shielded See Wiring the M2A XL Transmitter on page 17 2 Verify that the detector wiring is correct and secure 3 Increase the filter setting in Configuration Mode 4 Increase the zero suppr...

Страница 37: ...xternal alarms 2 Note the current gas reading displayed at the M2A XL Slow or No Response Difficult or Unable to Calibrate Unable to successfully set the fresh air or span reading during calibration M...

Страница 38: ...pan adjustment gas must be applied for this length of time Calibration This section describes how to calibrate the M2A XL transmitter It includes procedures to prepare for calibration enter Calibratio...

Страница 39: ...s mounted remotely from the M2A XL When zero air is applied to the M2A XL during a fresh air adjustment the M2A XL will freeze the display reading at the lowest response and the M2A XL will continue t...

Страница 40: ...Span Setting 1 If you want to continue with adjusting the span setting press and release the UP YES button APPLY will alternate with SPAN Gas on the top display line and the current gas reading will b...

Страница 41: ...adapter splash guard s flexible tubing from the regulator NOTE Do not disconnect the flexible tubing from the calibration adapter splash guard 11 Store the components of the calibration kit in a safe...

Страница 42: ...ransmitter Operator s Manual 10 Turn on or plug in power to the M2A XL NOTE Allow the replacement detector to warm up for 15 minutes before you continue with the next step 11 Calibrate the replacement...

Страница 43: ...e found online 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 w...

Страница 44: ...In this configuration 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 F...

Страница 45: ...n terminal 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 co...

Страница 46: ...e the termination 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 12...

Страница 47: ...bus Mode Modbus Mode allows you to configure various parameters relating to the Modbus setup of the M2A XL Modbus Mode includes a 5 minute time out feature If you do not press a control button for 5 m...

Страница 48: ...ration Parameters Modbus Mode Parameter Available Settings Description Enabled Disabled Can be set to ENABLED or DISABLED factory setting Enables or disables the Modbus output Slave ID The Slave ID ca...

Страница 49: ...ed is indicated on the display for a few seconds and the M2A XL returns 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 m...

Страница 50: ...ion 7 Low Power 8 Setup 11 Gas Type Change 0 Not Changed 1 Changed 10 Configuration Change 0 Not Changed 1 Changed 9 Calibration Activity Flag 0 No Calibration Activity 1 Calibration Activity Has Occu...

Страница 51: ...ter 14 Register 14 is the alarm 2 set point The decimal point location is the same as specified in Register 1 Registers 15 19 Registers 15 19 are the Gas Name ASCII String NULL Terminated Registers 20...

Страница 52: ...Register 29 Register 29 is the alarm 2 normal relay state 0 Normally De Energized 1 Normally Energized Register 30 Register 30 is the alarm 2 relay reset 0 Latching 1 Self Resetting Register 31 Regist...

Страница 53: ...ve Reading 6 Span Gas Value Is Not OK 7 Calculated Zero Is Too Low 8 Calculated Zero Is Too High 9 Zero Failure 10 Span Failure 11 Calibration Is Overscale 12 LEL Sensor Offset Is Too High 13 LEL Null...

Страница 54: ...n on the M2A XL It is useful for remotely silencing alarms With the M2A XL in an alarm condition bit 0 can be used to silence it Table 12 Register 16 Button Function NOTE Register 40 in Function Code...

Страница 55: ...e IR type 71 0622 65 2658XL CH4 4 M2A XL Transmitter Operator s Manual this document 81 0013RK 01 Calibration cylinder 50 volume CH4 in nitrogen 34 liter steel 81 0076RK 01 Zero air calibration cylind...

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: ...strip 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 unshiel...

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...

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