RKI Instruments 65-2646XLS-SW Operator's Manual
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RKI Instruments 65-2646XLS-SW Operator's Manual

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65-2646XLS-SW
M2A-XL Transmitter
Operator's Manual
Part Number: 71-0652
Revision: P1
Released: 1/24/24
RKI Instruments, Inc.
www.rkiinstruments.com

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Summary of Contents for RKI Instruments 65-2646XLS-SW

  • Page 1 65-2646XLS-SW M2A-XL Transmitter Operator’s Manual Part Number: 71-0652 Revision: P1 Released: 1/24/24 RKI Instruments, Inc. www.rkiinstruments.com...
  • Page 2 For most applications, typical calibration frequencies are between 3 and 6 months but can be more often or less often based on your usage. 2 • 65-2646XLS-SW M2A-XL Transmitter Operator’s Manual...
  • Page 3 We do not assume indemnification for any accident or damage caused by the operation of this gas monitor and our warranty is limited to the replacement of parts or our complete goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does not cover field labor or shipment of parts back to RKI.

  • Page 4: Table Of Contents

    Selecting the Gas Type ........... 31 4 • 65-2646XLS-SW M2A-XL Transmitter Operator’s Manual...
  • Page 5 Appendix C: Function Code 16 Registers ......58 65-2646XLS-SW M2A-XL Transmitter Operator’s Manual • 5...

  • Page 6: Chapter 1: Introduction

    Chapter 1: Introduction Overview This chapter briefly describes the 65-2646XLS-SW M2A-XL Transmitter. This chapter also describes the 65-2646XLS-SW M2A-XL Transmitter Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the M2A. About the M2A Transmitter The M2A transmitter is a fixed mount, continuous-monitoring detector head.

  • Page 7: Specifications

    M2A and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the M2A as described in this manual. 65-2646XLS-SW M2A-XL Transmitter Chapter 1: Introduction • 7...

  • Page 8: Chapter 2: Description

    WARNING: If the top conduit hub is used for wiring, be sure to seal the threads to ensure water does not enter the junction box. See “Wiring the M2A Transmitter” on page 17 for complete wiring instructions. 8 • Chapter 2: Description 65-2646XLS-SW M2A-XL Transmitter...
  • Page 9 The housing includes a four-socket pattern. This socket pattern accepts the sensor’s four pins to secure the sensor within the detector housing. A pre-amplifier, located between the sockets and two interconnect wires, conditions the sensor’s signal before the signal reaches the controller. 65-2646XLS-SW M2A-XL Transmitter Chapter 2: Description • 9...
  • Page 10 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. 10 • Chapter 2: Description 65-2646XLS-SW M2A-XL Transmitter...

  • Page 11: Internal Description

    The Modbus output may be used to connect the M2A to a Modbus network. The terminal PCB also controls three relays, one fail and two gas alarm relays. 65-2646XLS-SW M2A-XL Transmitter Chapter 2: Description • 11...
  • Page 12 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 into a Modbus network. 12 • Chapter 2: Description 65-2646XLS-SW M2A-XL Transmitter...
  • Page 13 RX LED Fail LED TX LED Magnetic Switches ENTER DOWN/NO RKI I S RUM UP/YES M2A-XL RA SMI Push Button Control Switches OLED Display UP/YES DOWN/NO ENTER Figure 5: Control PCB Component Location 65-2646XLS-SW M2A-XL Transmitter Chapter 2: Description • 13...
  • Page 14 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 22). 14 • Chapter 2: Description 65-2646XLS-SW M2A-XL Transmitter...
  • Page 15 The alarm 2 LED is on when the M2A is experiencing an alarm 2 condition. • RX & TX LED’s These LED’s indicate data being received (RX) and transmitted (TX) when the M2A’s Modbus output is operating. 65-2646XLS-SW M2A-XL Transmitter Chapter 2: Description • 15...

  • Page 16: Chapter 3: Installation & Startup

    3/4 NPT 1.93 2.25 Conduit Port, Plugged 1.12 3/4 NPT Conduit Port 8.6 max 3.4 max Ø 0.25, 2X 1 1/2-20 For Calibration Cup 1.02 Figure 6: Outline & Mounting Dimensions 16 • Chapter 3: Installation & Startup 65-2646XLS-SW M2A-XL Transmitter...

  • Page 17: Wiring The M2A Transmitter

    The detector terminal strip and the alarm 1 relay terminal strip may be removed by grasping them with your fingers if the adjacent terminal strips have been removed. 65-2646XLS-SW M2A-XL Transmitter Chapter 3: Installation & Startup • 17...
  • Page 18 NOTE: If the M2A is being wired to a PLC or DCS device, see “Appendix B: PLC and DCS Device Wiring” on page 57, then continue with step 8. 18 • Chapter 3: Installation & Startup 65-2646XLS-SW M2A-XL Transmitter...
  • Page 19 (24 VDC) - Alarm Device Detector Wiring Alarm 2 Alarm Device Modbus Typical Alarm Wiring Wiring Shown Figure 8: Wiring the M2A Junction Box to a Controller and Alarm Devices 65-2646XLS-SW M2A-XL Transmitter Chapter 3: Installation & Startup • 19...

  • Page 20: Start Up

    “Adjusting the Fresh Air Reading.” Adjusting the Fresh Air Reading When the M2A is shipped from RKI Instruments, Inc., it is factory calibrated. If a full calibration is desired at startup, see “Calibration” on page 36.
  • Page 21 4. Press and release the ENTER button. The M2A 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 will return to normal operation. 65-2646XLS-SW M2A-XL Transmitter Chapter 3: Installation & Startup • 21...

  • Page 22: Chapter 4: Operation

    M2A. 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. 22 • Chapter 4: Operation 65-2646XLS-SW M2A-XL Transmitter...

  • Page 23: 4 - 20 Ma Signal Output Operation

    1 setpoint • Gas reading alternates with ALARM-1 message Alarm 2 Increasing gas reading at or above the • A2 LED is on alarm 2 setpoint • Gas reading alternates with ALARM-2 message 65-2646XLS-SW M2A-XL Transmitter Chapter 4: Operation • 23...
  • Page 24 NOTE: If the ENTER button is pressed while the M2A is in an alarm 1 condition, the A1 LED will flash but all other indications will remain unchanged. You cannot de-energize the alarm 1 relay until the gas reading falls below the alarm 1 setpoint. 24 • Chapter 4: Operation 65-2646XLS-SW M2A-XL Transmitter...
  • Page 25 NOTE: The fail alarm has a 30 second delay. Responding to a Fail Condition 1. Verify that the detector wiring is correctly and securely connected. 2. Verify that the replaceable plug-in sensor in the detector housing is properly installed. 65-2646XLS-SW M2A-XL Transmitter Chapter 4: Operation • 25...
  • Page 26 2. When the input power increases above 10.0 volts, the M2A will begin its warm-up sequence. 3. Verify that the M2A enters normal operation after its warm-up sequence. If necessary, perform a fresh air adjustment. See “Adjusting the Fresh Air Reading” on page 20. 26 • Chapter 4: Operation 65-2646XLS-SW M2A-XL Transmitter...

  • Page 27: Chapter 5: Configuration Mode

    Table 5 lists the M2A 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 initiates an alarm 1 condition. (25 ppm) 65-2646XLS-SW M2A-XL Transmitter Chapter 5: Configuration Mode • 27...
  • Page 28 2 condition is initiated. It can be set in 1 sec- (1 secs) ond increments from 0 - 60 seconds, in 1 minute increments from 1 - 15 minutes, and in 15 minute increments from 15 - 60 minutes. 28 • Chapter 5: Configuration Mode 65-2646XLS-SW M2A-XL Transmitter...
  • Page 29 The DO OVER? YES/NO message will display. Press and release the UP/YES button. The Re-do Config message will display and the M2A will return to the first adjustable parameter. Go back to step 3 and continue. 65-2646XLS-SW M2A-XL Transmitter Chapter 5: Configuration Mode • 29...
  • Page 30 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 returns to normal operation. 30 • Chapter 5: Configuration Mode 65-2646XLS-SW M2A-XL Transmitter...

  • Page 31: 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 65-2646XLS-SW is carbon monoxide. Gas Type Mode includes a 5-minute time-out feature. If you do not press a button for 5 minutes, the M2A automatically returns to normal operation.
  • Page 32 See “Chapter 5: Configuration Mode” on page 27 for a complete description of Configuration Mode. 7. When you have reviewed and accepted the last item in Configuration Mode by pressing the ENTER button, display will ask SAVE IT? YES/NO. 32 • Chapter 6: Gas Type Mode 65-2646XLS-SW M2A-XL Transmitter...
  • Page 33 Since a complete calibration is required, the calibration sequence will proceed without asking if you want to perform certain operations. 65-2646XLS-SW M2A-XL Transmitter Chapter 6: Gas Type Mode • 33...

  • Page 34: 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. 34 • Chapter 7: Maintenance 65-2646XLS-SW M2A-XL Transmitter...
  • Page 35 5. If the fail condition continues, signal is low enough to contact RKI for further instruction. cause a fail condition. • The detector is malfunctioning. • The terminal or display PCB is malfunctioning. 65-2646XLS-SW M2A-XL Transmitter Chapter 7: Maintenance • 35...

  • Page 36: 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 carbon monoxide transmitter applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months.
  • Page 37 1. Connect the calibration kit sample tubing to the calibration cup hose barb. 2. Screw the calibration cup onto the detector. 3. Connect the fixed flow regulator to the calibration cup using the sample tubing. 65-2646XLS-SW M2A-XL Transmitter Chapter 7: Maintenance • 37...
  • Page 38 The display will indicate Leaving Cal Mode and the M2A will return to normal operation. 2. Screw the calibration gas cylinder into the fixed flow regulator. 3. Turn the regulator knob counterclockwise to open the regulator. 38 • Chapter 7: Maintenance 65-2646XLS-SW M2A-XL Transmitter...

  • Page 39: Replacing Components Of The Co Detector

    1. Turn off or disconnect power to the M2A. 2. Unscrew the detector housing cap from the housing body. Make sure not to lose the cap gasket. See Figure 2 for an illustration of the CO detector. 65-2646XLS-SW M2A-XL Transmitter Chapter 7: Maintenance • 39...
  • Page 40 8. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector housing body. 9. Turn on or plug in power to the M2A. CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the next step. 40 • Chapter 7: Maintenance 65-2646XLS-SW M2A-XL Transmitter...
  • Page 41 14. Turn on or plug in power to the M2A. CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the next step. 15. Calibrate the replacement detector as described in “Calibration” on page 36. 65-2646XLS-SW M2A-XL Transmitter Chapter 7: Maintenance • 41...

  • Page 42: Chapter 8: Rs-485 Modbus Output

    The MODBUS terminal strip is located on the terminal PCB (see Figure 4 on page 12). 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 42 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...
  • Page 43 An M2A 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 must still be removed. 65-2646XLS-SW M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 43...
  • Page 44 An M2A 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 must still remain installed. 44 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...
  • Page 45 ID = 2 ID = 3 ID = 4 ID = 127 Up to 128 M2As can be connected without a repeater Figure 13: Multiple M2As in a Two Branch Configuration 65-2646XLS-SW M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 45...

  • Page 46: Using The M2A 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 Modbus Mode parameters you can set. Table 9 also lists the factory set value for each parameter. 46 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...
  • Page 47 NOTE: All M2As on a Modbus network must be configured with the same baud rate and parity, and each M2A must have a unique slave ID. For an M2A to participate on a network, the ENABLED/DISABLED setting must be set to ENABLE. 65-2646XLS-SW M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 47...

  • Page 48: 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 48 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...
  • Page 49 Fail Relay Status 0 = Not Energized 1 = Energized Alarm 2 Relay Status 0 = Not Energized 1 = Energized Alarm 1 Relay Status 0 = Not Energized 1 = Energized 65-2646XLS-SW M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 49...
  • Page 50 Register 26 Register 26 is the alarm 1 ON delay. Integer values are in seconds. Register 27 Register 27 is the alarm 1 OFF delay. Integer values are in seconds. 50 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...
  • Page 51 Register 36 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. 65-2646XLS-SW M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 51...
  • Page 52 Function Code 16, Register 21, that value is automatically copied to Function Code 03, Register 40. The M2A firmware looks to Function Code 03, Register 40 for the remote configuration setting. 52 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...
  • Page 53 Function Code 16, Register 21, that value is automatically copied to Function Code 03, Register 40. The M2A firmware looks to Function Code 03, Register 40 for the remote configuration setting. 65-2646XLS-SW M2A-XL Transmitter Chapter 8: RS-485 Modbus Output • 53...
  • Page 54 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 54 • Chapter 8: RS-485 Modbus Output 65-2646XLS-SW M2A-XL Transmitter...

  • Page 55: Chapter 9: Parts List

    M2A-XL junction box with foam pad, label, and conduit plug 33-7101RK Charcoal filter disk 45-6132RK Termination and ground jumper 71-0652 65-2646XLS-SW 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 56: Appendix A: Control Button Quick Reference Guide

    5 seconds Modbus Mode Press and Hold • Enable or Disable Modbus DOWN/NO and • Slave ID ENTER for 5 • Baud Rate seconds • Parity • Response Delay 56 • Appendix A: Control Button Quick Reference Guide 65-2646XLS-SW M2A-XL Transmitter...

  • Page 57: Appendix B: Plc And Dcs Device Wiring

    (24 VDC) - Alarm 1 Alarm Device Detector Controller Wiring (PLC, DCS) Alarm 2 Alarm Device Modbus Wiring Typical Alarm Wiring Shown Figure 14: PLC and DCS Device Wiring 65-2646XLS-SW M2A-XL Transmitter Appendix B: PLC and DCS Device Wiring • 57...

  • Page 58: 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 58 • Appendix C: Function Code 16 Registers 65-2646XLS-SW M2A-XL Transmitter...
  • Page 59 Integer value is in seconds (0-60 in 5 second increments). Register 15 Register 15 is the calibration timeout. Value is in minutes (5, 10, 15, 20, 25, or 30). 65-2646XLS-SW M2A-XL Transmitter Appendix C: Function Code 16 Registers • 59...
  • Page 60 This register can be used to clear those flags. Table 17: Register 19, Clear Change Flags Bit(s) Value & Field [15:2] Unused Write “1” to this bit to clear “Gas Type Changed” flag 60 • Appendix C: Function Code 16 Registers 65-2646XLS-SW M2A-XL Transmitter...
  • Page 61 Function Code 16, Register 21, that value is automatically copied to Function Code 03, Register 40. The M2A firmware looks to Function Code 03, Register 40 for the remote configuration setting. 65-2646XLS-SW M2A-XL Transmitter Appendix C: Function Code 16 Registers • 61...

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