RKI Instruments 65-2662XL-04 Operator's Manual
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RKI Instruments 65-2662XL-04 Operator's Manual

M2a-xl transmitter
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65-2662XL-04
M2A-XL Transmitter
Operator's Manual
Part Number: 71-0616
Revision: P1
Released: 11/15/22
RKI Instruments, Inc.
www.rkiinstruments.com

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Summary of Contents for RKI Instruments 65-2662XL-04

  • Page 1 65-2662XL-04 M2A-XL Transmitter Operator’s Manual Part Number: 71-0616 Revision: P1 Released: 11/15/22 RKI Instruments, Inc. www.rkiinstruments.com...
  • Page 2 Typical calibration frequencies for most applications are between 3 and 6 months, but can be required more often or less often based on your usage. 2 • 65-2662XL-04 M2A-XL Transmitter Operator’s Manual...
  • Page 3 Product Warranty RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year from date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge.

  • Page 4: Table Of Contents

    Selecting the Gas Type ............34 4 • 65-2662XL-04 M2A-XL Transmitter Operator’s Manual...
  • Page 5 Appendix C: Function Code 16 Registers ......63 65-2662XL-04 M2A-XL Transmitter Operator’s Manual • 5...

  • Page 6: Chapter 1: Introduction

    Chapter 1: Introduction Overview This chapter briefly describes the 65-2662XL-04 M2A-XL Transmitter. This chapter also describes the 65-2662XL-04 M2A-XL Transmitter Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the M2A-XL. About the M2A-XL Transmitter The M2A-XL transmitter is a fixed mount, continuous-monitoring detector head.

  • Page 7: Specifications

    M2A-XL and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the M2A- XL as described in this manual. 65-2662XL-04 M2A-XL Transmitter Chapter 1: Introduction • 7...

  • Page 8: Chapter 2: Description

    3/4 NPT Conduit Hub Terminal Mounting Hole (2x) Strip Window Magnetic Wand 3/4 NPT Conduit Hub M2A-XL Junction Box Detector Junction Box Hydrogen Sulfide Detector Calibration Adapter/ Splash Guard Figure 1: M2A-XL External Components 8 • Chapter 2: Description 65-2662XL-04 M2A-XL Transmitter...
  • Page 9 A ground boss near the top conduit hub provides an external earth ground connection. 65-2662XL-04 M2A-XL Transmitter Chapter 2: Description • 9...
  • Page 10 Rubber Boot and Spacer A rubber boot and spacer are installed between the detector housing cap and the sensor. They help ensure that the sensor remains plugged into the detector housing body. 10 • Chapter 2: Description 65-2662XL-04 M2A-XL Transmitter...
  • Page 11 The magnetic wand is a short plastic rod with a magnet in one end. It is used to actuate the magnetic control switches on the control PCB while the junction box cover is still installed so that non-intrusive calibration can be performed. 65-2662XL-04 M2A-XL Transmitter Chapter 2: Description • 11...

  • Page 12: Internal Description

    The Modbus output may be used to connect the M2A-XL to a Modbus network. The terminal PCB also controls three relays, one fail and two gas alarm relays. 12 • Chapter 2: Description 65-2662XL-04 M2A-XL Transmitter...
  • Page 13 The Modbus terminal strip is a three position plug-in style terminal strip and is the bottom terminal strip in the left terminal column. It allows connection of the M2A-XL into a Modbus network. 65-2662XL-04 M2A-XL Transmitter Chapter 2: Description • 13...
  • Page 14 Figure 5: Control PCB Component Location OLED Display The OLED display is located at the top of the control PCB. It indicates the current gas reading and displays messages and parameters in the M2A-XL’s programs. 14 • Chapter 2: Description 65-2662XL-04 M2A-XL Transmitter...
  • Page 15 Since displaying the Information Screen only requires the use of one switch, the wand may be used to show the Information Screen (see “Information Screen” on page 26). 65-2662XL-04 M2A-XL Transmitter Chapter 2: Description • 15...
  • Page 16 The alarm 2 LED is on when the M2A-XL is experiencing an alarm 2 condition. • RX & TX LED’s These LED’s indicate data being received (RX) and transmitted (TX) when the M2A-XL’s Modbus output is operating. 16 • Chapter 2: Description 65-2662XL-04 M2A-XL Transmitter...

  • Page 17: Chapter 3: Installation & Startup

    Mount the detector junction box with the detector facing down as shown in Figure 7. 3/4 NPT 4.86 5.66 Conduit Port, 2.82 3/4 NPT Plugged Conduit Port Ø 0.25, 2X 1.00 Figure 6: Outline & Mounting Dimensions, M2A-XL Junction Box 65-2662XL-04 M2A-XL Transmitter Chapter 3: Installation & Startup • 17...
  • Page 18 3. Install 3/16 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: Parts List” on page 59 for available tubing. 18 • Chapter 3: Installation & Startup 65-2662XL-04 M2A-XL Transmitter...

  • Page 19: Wiring The M2A-Xl Transmitter

    500 ft. 1,000 ft. 2,000 ft. 10. Connect the wires to the terminal block in the detector junction box. 11. Secure the detector junction box’s cover to the junction box. 65-2662XL-04 M2A-XL Transmitter Chapter 3: Installation & Startup • 19...
  • Page 20 CAUTION: If shielded cable is used, leave the cable shield’s drain wire disconnected and insulated at the detector junction box. You will connect the opposite end of the cable’s drain wire to the M2A-XL junction box’s chassis (earth) ground. 20 • Chapter 3: Installation & Startup 65-2662XL-04 M2A-XL Transmitter...
  • Page 21 16. If shielded cable is used between the detector junction box and the M2A-XL junction box, connect the cable’s drain wire to an available chassis (earth) ground at the M2A-XL junction box. Do not connect the shield drain wire at the detector junction box. 65-2662XL-04 M2A-XL Transmitter Chapter 3: Installation & Startup • 21...
  • Page 22 Table 3: Wire Size for PWR/SIG Connections Max Distance to Max Distance to Max Distance to Controller Controller w/16 Gauge Controller w/14 Gauge w/18 Gauge Wire Wire Wire 2,500 ft. 5,000 ft. 8,000 ft. 22 • Chapter 3: Installation & Startup 65-2662XL-04 M2A-XL Transmitter...
  • Page 23 5. Make controller, device, and relay connections as appropriate. If shielded cable is used for the PWR/SIG connections, connect the cable shield’s drain wire to an available chassis ground at the gas monitoring controller, recording device, or programmable controller. 65-2662XL-04 M2A-XL Transmitter Chapter 3: Installation & Startup • 23...

  • Page 24: Start Up

    “Adjusting the Fresh Air Reading.” Adjusting the Fresh Air Reading When the M2A-XL is shipped from RKI Instruments, Inc., it is factory calibrated. If a full calibration is desired at startup, see “Calibration” on page 41.
  • Page 25 4. Press and release the ENTER button. The M2A-XL will perform a zero operation and the display will indicate SPAN w/Cal Gas?. 5. Press and release the DOWN/NO button. The display will indicate Leaving CAL Mode and the M2A-XL will return to normal operation. 65-2662XL-04 M2A-XL Transmitter Chapter 3: Installation & Startup • 25...

  • Page 26: Chapter 4: Operation

    M2A-XL. 3. Release the DOWN/NO button when you are done viewing the Information Screen. The display will return to the normal operation screen within a couple of seconds. 26 • Chapter 4: Operation 65-2662XL-04 M2A-XL Transmitter...

  • Page 27: 4 - 20 Ma Signal Output Operation

    2.4 mA until the fail alarm is cleared. During the 30 second delay, the signal output follows the detector output. In the case of a downscale reading, the display and the signal output continue to track the reading down to -99% of full scale (1.15 mA). 65-2662XL-04 M2A-XL Transmitter Chapter 4: Operation • 27...

  • Page 28: Alarm Indications

    When the gas reading reaches the alarm 1 setpoint, the M2A-XL senses an alarm 1 condition. The M2A-XL alerts you to an alarm 1 condition as follows: • The A1 LED turns on. • The gas reading alternates with the ALARM-1 message. • The alarm 1 relay energizes. 28 • Chapter 4: Operation 65-2662XL-04 M2A-XL Transmitter...
  • Page 29 NOTE: If the ENTER button is pressed while the M2A-XL is in an alarm 2 condition, the A2 LED will flash but all other indications will remain unchanged. You cannot de-energize the alarm 2 relay until the gas reading falls below the alarm 2 setpoint. 65-2662XL-04 M2A-XL Transmitter Chapter 4: Operation • 29...
  • Page 30 2. When the input power increases above 10.0 volts, the M2A-XL will begin its warm-up sequence. 3. Verify that the M2A-XL enters normal operation after its warm-up sequence. If necessary, perform a fresh air adjustment. See “Adjusting the Fresh Air Reading” on page 24. 30 • Chapter 4: Operation 65-2662XL-04 M2A-XL Transmitter...

  • Page 31: Chapter 5: Configuration Mode

    Table 5 lists the M2A-XL parameters you can set. Table 5 also lists the factory set value for each parameter. Table 5: Configuration Parameters Parameter Description (Factory Set Value) ALARM-1 (level) The gas reading at which the M2A-XL initiates an alarm 1 condition. (10 ppm) 65-2662XL-04 M2A-XL Transmitter Chapter 5: Configuration Mode • 31...
  • Page 32 2 condition is initiated. It can be set in 1 second (1 secs) increments from 0 - 60 seconds, in 1 minute increments from 1 - 15 minutes, and in 15 minute increments from 15 - 60 minutes. 32 • Chapter 5: Configuration Mode 65-2662XL-04 M2A-XL Transmitter...
  • Page 33 If you wish to save the adjustments made, press and release the UP/YES button. Config Saved is indicated on the display for a few seconds and the M2A-XL returns to normal operation. 65-2662XL-04 M2A-XL Transmitter Chapter 5: Configuration Mode • 33...

  • Page 34: Chapter 6: Gas Type Mode

    CAUTION: The target gas is factory set and does not normally need to be changed. The standard setting for the 65-2662XL-04 is hydrogen sulfide. Gas Type Mode includes a 5-minute time-out feature. If you do not press a button for 5 minutes, the M2A-XL automatically returns to normal operation.
  • Page 35 Use the UP/YES and DOWN/NO buttons to adjust a setting. See “Chapter 5: Configuration Mode” on page 31 for a complete description of Configuration Mode. 65-2662XL-04 M2A-XL Transmitter Chapter 6: Gas Type Mode • 35...
  • Page 36 Since a complete calibration is required, the calibration sequence will proceed without asking if you want to perform certain operations. 36 • Chapter 6: Gas Type Mode 65-2662XL-04 M2A-XL Transmitter...

  • Page 37: Chapter 7: Maintenance

    This ribbon cable plugs into a connector on the top edge of the control PCB and on the bottom of the terminal PCB. 3. If the power difficulties continue, contact RKI for further instruction. 65-2662XL-04 M2A-XL Transmitter Chapter 7: Maintenance • 37...
  • Page 38 • The detector fresh air contact RKI for further signal is low enough instruction. to cause a fail condition. • The detector is malfunctioning. • The terminal or display PCB is malfunctioning. 38 • Chapter 7: Maintenance 65-2662XL-04 M2A-XL Transmitter...

  • Page 39: Calibration Frequency

    Although there is no particular calibration frequency that is correct for all applications, a calibration frequency of every 3 to 6 months is adequate for most hydrogen sulfide transmitter applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months.
  • Page 40 10. Add 1 minute to the length of time determined in Step 6. This is the response time for the detector. When performing a zero adjustment or span adjustment, gas must be applied for this length of time. 40 • Chapter 7: Maintenance 65-2662XL-04 M2A-XL Transmitter...

  • Page 41: Calibration

    Touching the glass and removing the wand is the same as pressing and releasing a button. Touching the glass and keeping the wand in place is the same as pressing and holding a button. 65-2662XL-04 M2A-XL Transmitter Chapter 7: Maintenance • 41...
  • Page 42 9. Unscrew the zero air cylinder from the fixed flow regulator. Leave the calibration adapter/ splash guard’s flexible tubing connected to the regulator. The M2A-XL will continue to display the minimum gas response on the display and retain the response level in its memory. 42 • Chapter 7: Maintenance 65-2662XL-04 M2A-XL Transmitter...
  • Page 43 8. The M2A-XL will perform a span operation. The display will indicate SPAN Gas PASS for a few seconds, then indicate SPAN Gas SAVED before indicating Leaving CAL Mode for a few seconds. NOTE: If the span adjustment fails, see “Troubleshooting” on page 37 for recommended actions. 65-2662XL-04 M2A-XL Transmitter Chapter 7: Maintenance • 43...

  • Page 44: Replacing Components Of The H S Detector

    6. Remove the replacement sensor from its packaging and remove the wire jumper. This wire jumper is installed on the sensor pins for shipment or storage but must be removed for the sensor to operate properly when installed in a detector. 44 • Chapter 7: Maintenance 65-2662XL-04 M2A-XL Transmitter...
  • Page 45 7. Connect the detector leads to the terminal block the same way the old detector was wired (see Figure 8 on page 21). 8. Screw the calibration adapter/splash guard onto the new detector housing cap. 65-2662XL-04 M2A-XL Transmitter Chapter 7: Maintenance • 45...
  • Page 46 10. Turn on or plug in power to the M2A-XL. CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the next step. 11. Calibrate the replacement detector as described in “Calibration” on page 41. 46 • Chapter 7: Maintenance 65-2662XL-04 M2A-XL Transmitter...

  • Page 47: Chapter 8: Rs-485 Modbus Output

    The MODBUS terminal strip is located on the terminal PCB (see Figure 4 on page 13). The following signals are available at the Modbus terminal strip: Table 8: Modbus Terminal Strip Signals Modbus Terminal Label (RS-485 Modbus Signal Name Name) Common 65-2662XL-04 M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 47...
  • Page 48 An M2A-XL can be wired into an existing M2 Modbus system. The shape of the terminal PCB will be different but the wiring connections are identical and the ground jumper on the M2A-XL must still be removed. 48 • Chapter 8: RS-485 Modbus Output 65-2662XL-04 M2A-XL Transmitter...
  • Page 49 An M2A-XL can be wired into an existing M2 Modbus system. The shape of the terminal PCB will be different but the wiring connections are identical and the ground jumper on the M2A-XL must still remain installed. 65-2662XL-04 M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 49...
  • Page 50 ID = 2 ID = 3 ID = 4 ID = 127 Up to 128 M2As can be connected without a repeater Figure 14: Multiple M2A-XLs in a Two Branch Configuration 50 • Chapter 8: RS-485 Modbus Output 65-2662XL-04 M2A-XL Transmitter...

  • Page 51: Using The M2A-Xl In A 4-Wire Modbus System

    If the currently displayed parameter setting is OK, press the ENTER button to proceed to the next parameter. Table 9 lists the M2A-XL Modbus Mode parameters you can set. Table 9 also lists the factory set value for each parameter. 65-2662XL-04 M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 51...
  • Page 52 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, the ENABLED/DISABLED setting must be set to ENABLE. 52 • Chapter 8: RS-485 Modbus Output 65-2662XL-04 M2A-XL Transmitter...

  • Page 53: Supported Modbus Functions

    1 = Initialization 2 = Normal 3 = Warm-up 4 = Fail 5 = Calibration 6 = Post-Calibration 7 = Low Power 8 = Setup [11] Gas Type Change 0=Not Changed 1=Changed 65-2662XL-04 M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 53...
  • Page 54 0 = Not Energized 1 = Energized Alarm 1 Relay Status 0 = Not Energized 1 = Energized Register 3 Register 3 is the supply voltage (0.1 volt per count). 54 • Chapter 8: RS-485 Modbus Output 65-2662XL-04 M2A-XL Transmitter...
  • Page 55 Integer values are in seconds. Register 27 Register 27 is the alarm 1 OFF delay. Integer values are in seconds. Register 28 Register 28 is the alarm 2 trigger. 0=Decreasing 1=Increasing 65-2662XL-04 M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 55...
  • Page 56 Register 36 is calibration month (upper byte) and day (lower byte). This is zero based (e.g. January=0 and the 1st=0). Register 37 Register 37 is the calibration year. Register 38 Register 38 is the calibration outcome. Upper=Gas Operation Lower=Air Operation 56 • Chapter 8: RS-485 Modbus Output 65-2662XL-04 M2A-XL Transmitter...
  • Page 57 NOTE: Register 40 in Function Code 03, the remote configuration register, must be set to 1 in order for Register 16 to work. Value & Field ENTER (used for “Alarm Reset”) 0=Not Pressed 1=Pressed 65-2662XL-04 M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 57...
  • Page 58 58 • Chapter 8: RS-485 Modbus Output 65-2662XL-04 M2A-XL Transmitter...

  • Page 59: Chapter 9: Parts List

    M2A junction box 45-6132RK Termination and ground jumper 65-2428 S replacement detector assembly (includes sensor), CSA version 71-0616 65-2662XL-04 M2A-XL Transmitter Operator’s Manual (this docu- ment) 81-0076RK-01 Zero air calibration cylinder, 34 liter steel 81-0076RK-03 Zero air calibration cylinder, 103 liter...

  • Page 60: Appendix A: Control Button Quick Reference Guide

    5 seconds • Enable or Disable Modbus Modbus Mode Press and Hold DOWN/NO and • Slave ID ENTER for 5 • Baud Rate seconds • Parity • Response Delay 60 • Appendix A: Control Button Quick Reference Guide 65-2662XL-04 M2A-XL Transmitter...

  • Page 61: Appendix B: Plc And Dcs Device Wiring

    • If the M2A-XL will be wired into a Modbus network, see “Chapter 8: RS-485 Modbus Output” on page 47. 65-2662XL-04 M2A-XL Transmitter Appendix B: PLC and DCS Device Wiring • 61...
  • Page 62 (24 VDC) - Alarm 1 Alarm Device Detector Controller Wiring (PLC, DCS) Alarm 2 Alarm Device Modbus Wiring Typical Alarm Wiring Shown Figure 15: PLC and DCS Device Wiring 62 • Appendix B: PLC and DCS Device Wiring 65-2662XL-04 M2A-XL Transmitter...

  • Page 63: Appendix C: Function Code 16 Registers

    Value must be an integer. Any decimals are omitted. The decimal point location is the same as specified in Register 1 of Function Code 03. Register 8 Register 8 is the alarm 2 trigger. 0=Decreasing 1=Increasing 65-2662XL-04 M2A-XL Transmitter Appendix C: Function Code 16 Registers • 63...
  • Page 64 Register 16 is explained in Supported Modbus Functions in the M2A-XL manual. Register 17 Register 17 is the calibration month (MSB) and day (LSB). This is zero-based (e.g. January=0 and the 1st=0). Register 18 Register 18 is the calibration year. 64 • Appendix C: Function Code 16 Registers 65-2662XL-04 M2A-XL Transmitter...
  • Page 65 Write “1” to this bit to clear “Configuration Changed” flag Register 20 Register 20 is the AutoZero Disable. 0=AutoZero Enabled 1=AutoZero Disabled Register 21 Register 21 is the Remote Configuration Register. 0=No Remote Configuration 1=Reset Alarm 65-2662XL-04 M2A-XL Transmitter Appendix C: Function Code 16 Registers • 65...

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