MSA MGS-550 Operating Manual
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MSA MGS-550 Operating Manual

Fixed gas detector
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Operating Manual
MGS-550
Fixed Gas Detector
Order No.: H1100-1000/01
Print Spec: 10000005389 (R)
CR: 800000058146
MSAsafety.com
US

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Summary of Contents for MSA MGS-550

  • Page 1 Operating Manual MGS-550 Fixed Gas Detector Order No.: H1100-1000/01 Print Spec: 10000005389 (R) CR: 800000058146 MSAsafety.com...
  • Page 2 The warranties made by MSA with respect to the product are voided if the product is not installed and used in accordance with the instructions in this manual. Please protect yourself and your employees by following the instructions.
  • Page 3 All software utilized and/or distributed by MSA Bacharach is subject to copyright protection. All rights are reserved. No party may use or copy such software in any manner or format, except to the extent that MSA Bacharach grants them a license to do so. If this software is being loaded onto more than one computer, extra software licenses must be purchased.

  • Page 4: Table Of Contents

    Disposing of Electrochemical Sensors Technical Data General Specifications Sensor Specifications Modbus Registers Ordering Information 10.1 MGS-550 Instrument Only 10.2 MGS-550 Gas Detector, IP66 with IP66 Sensor 10.3 MGS-550 5m Remote and Second Sensing Heads 10.4 MGS-550 Replacement Parts and Accessories MGS-550...

  • Page 5: Safety

    Only trained and competent personnel may use this product. Only trained and competent personnel may inspect, repair and maintain the product as detailed in this manual. Maintenance that is not detailed in this manual must be completed by MSA Bacharach or personnel qualified by MSA Bacharach.

  • Page 6: Key Product Features

    Redundant sensor mapping option (one sensor can be mapped to both analog outputs) Menu navigation options: Tactile switches on the front cover Non-intrusive magnetic wand on the front cover Non-intrusive magnetic wand can be used to configure, calibrate, and maintain the device MGS-550...

  • Page 7: General Overview

    2 Description General Overview MGS-550...

  • Page 8: Sensor Styles

    If stranded conductors are used, a ferrule should be used. To improve RFI immunity in extreme environments, it might be necessary to ground the shield of the communications cable at the PLC, front-end controller, or Building Management System (e.g., the chassis, the ground bus-bar, etc.). MGS-550...

  • Page 9: Installation Restrictions

    Consider implications of the future use of accessories and maintenance equipment. Ensure that the mounting surface is flat and plumb. Ensure that any installed sensor is pointing downwards. MSA Bacharach recommends using M5 bolts (or smaller) with hex socket caps to mount the device. Electrical Installation 3.4.1...
  • Page 10 Using appropriate cable glands and/or conduit, connect the wires for power and signal to the appropriate terminal as indicated in the figure and wiring table that follow. Polarity must not be reversed. For 24 VAC installations in a daisy-chain configuration, the neutral polarity must be maintained for all instruments. Fasten terminal screws. MGS-550...
  • Page 11 Relay Wiring WARNING! At voltages > 30 VAC or > 42.2 VDC, the relay cables must be enclosed in protective conduit, or double-insulated cables must be used. Failure to follow this warning can result in serious personal injury or death. MGS-550...
  • Page 12 However, if a sensor is already connected, then it should be left plugged into its socket. If two remote sensors are to be installed, register only one sensor at a time. Refer to section 4.3.6 Register Sensor (F-06). MGS-550...
  • Page 13 3.4.5 Connecting One or More MGS-550s to an MSA Bacharach Controller NOTE: For wiring and configuration information, please refer to the manual which was included with the MSA Bacharach controller (e.g., MGS, etc.). At the central control system, connect the shield of the wires to the earth ground of the controller (e.g., the chassis, the ground bus-bar, etc.).
  • Page 14 4.4.5 Modbus Configuration (MB-xx). If the MGS-550 is at the end of the Modbus network, the terminating resistor must be set to “IN”. All other instrument terminating resistor must be set to “OUT” (factory default). See section 4.4.5 Modbus Configuration (MB-xx).

  • Page 15: Operation

    (F-01)). If two sensors are installed, both target gas names and “0”s will be toggled sequentially. NOTE: Sensor warm-up times may be different for dual sensor configurations. The power LED will continue to blink as long as at least one sensor is in warm-up. MGS-550...
  • Page 16 4.1.3 Verifying the Digital Modbus Signal The MGS-550 provides a Modbus RTU digital interface. All status messages and most parameters which can be accessed and/or configured through the menu can also be accessed and/or configured via a Building Management using a Modbus network. See section 4.4.5 Modbus Configuration...
  • Page 17 (for example, after registering a sensor, after calibrating a sensor, etc.). This is a confirmation display prior to de-registering all sensors and resetting node addresses (F-08). Tap [ENTER] to confirm reset. See section 4.3.8 De- register All Sensors and Reset Node Address (F-08) for additional information. MGS-550...
  • Page 18 NOTE: If two sensors are installed for the same gas, but have different measuring ranges, the unique sensor identifier or UID (see label on the sensor) will be displayed in addition to the gas name. NOTE: Depending on the sensor and measuring range, the gas concentration may or may not be shown with a decimal point. MGS-550...

  • Page 19: Menus

    4 Operation Menus 4.2.1 General Navigation The MGS-550 offers two methods of navigating through the menu. • Use the non-intrusive magnetic wand (tapping above • Use the internal push buttons (pressing the the “magnetic” icons with dashes) push button points).
  • Page 20 Access diagnostics, system information, and fault parameters F-10 Reset system to factory default setting An example of the layered structure of functions, menus, and parameters is illustrated below. Individual functions and parameters are described in detail in the sections that follow. MGS-550...
  • Page 21 4 Operation MGS-550...

  • Page 22: Functions

    Use the [UP] / [DOWN] key to select the test to be performed: 1 = relay test 2 = analog output test 3 = display test. After exiting this function, the instrument returns to the function menu and all test overrides are removed. MGS-550...
  • Page 23 “reg 2” will be displayed (depending on the configuration). Tap [ENTER] to confirm registration of the adding a sensor. “PASS1” or “PASS2” will be displayed. sensor Address If a sensor was previously registered in an instrument, was not de-registered, was removed, and then conflict MGS-550...
  • Page 24 Use the [UP] / [DOWN] keys to select a diagnostics code. After tapping [ENTER], the respective code will be displayed. See section 5.3 Troubleshooting for additional information. NOTE: The diagnostics attributes can be accessed directly during normal operation by tapping and holding [UP] for more than 3 seconds. MGS-550...

  • Page 25: Parameters

    S1-08 S2-08 4 = Latching, acknowledgeable Behavior S1-09 S2-09 Sensor n Type Code 4-digit sensor code (read-only) Read-Only. Sensor n measurement units: 1 = ppm S1-10 S2-10 Sensor n Units 2 = ppb 3 = Vol% 4 = %LEL MGS-550...
  • Page 26 NOTE: For all instruments monitoring oxygen, the low and medium alarms occur on concentrations that decrease below the set-points. The high alarm occurs on gas concentrations that increase beyond the set-point. This permits the detection of oxygen displacement and enrichment scenarios. MGS-550...
  • Page 27 Non-latching means that the alarm status clears if the gas concentration does not meet the alarm condition anymore. Acknowledgeable means that the alarm relay can be reset before the alarm condition clears. Not acknowledgeable means that the alarm relay cannot be reset until the alarm condition clears. MGS-550...
  • Page 28 For example, consider a 2-sensor system with relays configured as follows: R1-02=01 Relay 1 configured as 01 (Sensor 1 Low Alarm). R2-02=06 Relay 2 configured as 06 (Sensor 2 Medium Alarm). R3-02=13 Relay 3 configured as 13 (Any Sensor Fault or Instrument Electronics Critical Fault). MGS-550...
  • Page 29 Scales the FSD (full-scale deflection), i.e., the measuring range, between 20 and 100% FSD, to the maximum analog output (e.g., 20 mA). A1-03 Analog Output 1 Scaling The selected full scale deflection determines the analog output (e.g., 20 mA MGS-550...
  • Page 30 0 = OFF (gas name and concentration will not be shown) P1-01 Display Mode 1 = ON (gas name and concentration will be shown) If an alarm or fault condition occurs, the display will be turned on to show the error code(s). MGS-550...

  • Page 31: Maintenance

    Select alarm configuration (01 to 14) to activate Buzzer. Buzzer Enable and B1-01 Source 00 = Buzzer disabled Each MGS-550 has a built-in buzzer which can be designated to any alarm configuration. Refer to section 4.4.2 Relay Designation (RX-xx) for a list of alarm configurations. Maintenance...
  • Page 32 NOTE: If the intended operation is at higher altitudes, the factory calibration will result in a reading that is lower than the reading at sea level (a result of reduced partial pressure). A new span adjustment is recommended if the altitude or the ambient pressure is changed. The factory calibration is set to sea level. MGS-550...
  • Page 33 Use [UP] / [DOWN] to change the value to match the concentration of the calibration gas (in the units of the sensor – i.e., ppm, Vol %, %LEL, etc.), and tap [ENTER]. Apply span gas (see section 5.2.2 General Procedure) and tap [ENTER]. MGS-550...

  • Page 34: Troubleshooting

    0002 = Master RX buffer full (Non-critical, E300) D-01 0004 = Slave RX buffer full (Non-critical, E300) 0008 = CRC error in received packet (Non-critical, E300) 0010 = CRC error in received packet (Non-critical, E300) 0020 = Packet timeout (Non-critical, E300) MGS-550...
  • Page 35 2000 = Analog front end communications fault 4000 = Negative gas concentration fault 8000 = Sensor configuration fault For more information on these faults, Refer to table in section 5.3.5 Sensor Faults. Refer to section 5.3.1 Hexadecimal Format for combined codes. MGS-550...
  • Page 36 One or more power supply Input supply power to the Correct the input supply voltage to restore normal operation. 2000 voltages out of MGS-550 is out of range. See section 9.1 General Specifications. range Micro-processor 4000 Cycle power to the instrument.
  • Page 37 Checksum 0008 (CRC) error in Refer to section 3.4.5 Connecting One or More MGS- Transmission is corrupted received packet 550s to an MSA Bacharach Controller. (computed checksum doesn’t Checksum match transmitted checksum) Verify proper communications settings for the network. 0010...
  • Page 38 Analog front end 2000 communications EC analog front end failure Replace sensor module fault Negative gas 4000 Sensor has drifted too negative Perform zero and span calibration concentration fault Sensor 8000 General error in sensor configuration Replace sensor module configuration fault MGS-550...

  • Page 39: Sensor Maintenance

    Permeable membrane See figure above Lock nut (M40 X 1.5) See figure above Splash guard See figure above 1-12 Entire Assy (Local) 5.4.4 Replacing the Local Sensing Head Assembly 1-12 Entire Assy (Remote) 5.4.6 Replacing the Remote Sensing Head Assembly MGS-550...
  • Page 40 14. Screw locknut back on until it clicks three times (hand tight) while compressing the sensor cap against the base. 15. Power-up the instrument. Replacing the sensor control board requires sensor registration. See section 4.3.6 Register Sensor (F-06). 16. Verify calibration. MGS-550...
  • Page 41 9. Put lid back on and tighten the six screws. 10. Power-up instrument. 11. The instrument will prompt to start the sensor registration (e.g., “rEg 1”). Acknowledge with [ENTER]. The instrument will then indicate successful registration (e.g., “PASS 1”). MGS-550...
  • Page 42 8. Replace the enclosure lid as appropriate. 9. Power-up the instrument. 10. The instrument will prompt to start the sensor registration (e.g., “rEg 2”). Acknowledge with [ENTER]. The instrument will then indicate successful registration (e.g., “PASS 2”). MGS-550...
  • Page 43 8. Put lid back on and tighten the six screws. 9. Power-up instrument. 10. The instrument will prompt to start the sensor registration (e.g., “rEg 1”). Acknowledge with [ENTER]. The instrument will then indicate successful registration (e.g., “PASS 1”). MGS-550...

  • Page 44: Replacing The Instrument Electronics

    11. Replace the housing lid (maintain IP rating). Tighten the six screws of the lid using an M5 hex key. 12. Check settings of the parameters (see section Parameters), perform an instrument test (see section 4.3.4 Instrument Test (F-04)), and check calibration (see section 5.2.4 Span Adjustment). MGS-550...

  • Page 45: Replacing The Interface Board

    9. Replace the housing lid. Tighten the six screws of the lid using an M5 hex key. 10. Power up the instrument and verify proper operation. 11. Register sensors. See section 4.3.6 Register Sensor (F-06). Cleaning the Instrument Clean the instrument with a soft cloth using water and a mild detergent. Rinse with water. MGS-550...

  • Page 46: Factory Default Settings

    Alarm OFF Delay Value 00 = no delay AF-03 Critical Fault Latching 1 = latching AF-04 Alarm Acknowledge Timeout 59 minutes A1-01 Analog Output 1 Source 1 = Sensor 1 A1-02 Analog Output 1 Type 4 = 4 – 20 mA MGS-550...

  • Page 47: Sensor Principle

    2. Corrosive compounds such as halogenated hydrocarbons (releasing halogens such as bromine, chlorine or fluorine when oxidized) and halogen hydride acids as well as acidic gaseous compounds such as sulfur dioxide and nitrogen oxides, 3. Catalyst poisons such as sulfurous and phosphorous compounds, silicon compounds (especially silicones), and metal-organic vapors. MGS-550...

  • Page 48: Semiconductor Sensors

    However, this device has not been registered for household usage. Therefore it must not be disposed of through these channels. The device can be returned to your national MSA Bacharach Sales Organization for disposal. Please do not hesitate to contact MSA Bacharach if you have any further questions on this issue.

  • Page 49: Disposing Of Electrochemical Sensors

    Alarm delay 0 to 15 minutes (selectable) 2-, 3-, 4-, or 6-core shielded cable, 16 to 20 AWG (0.5 to Power and analog signal 1.5 mm Wiring 2-core twisted pair shielded cable 16 to 20 AWG (0.5 to Modbus network MGS-550...

  • Page 50: Sensor Specifications

    Influences restrictions of a particular sensor see sensor data sheet. Agency Approvals CE, UL/CSA/IEC/EN 61010-1 USA Certification (for units assembled in USA): MSA Bacharach (USA) is a TÜV-SÜD certified company. Company Certifications Ireland Certification (for units assembled in Ireland): Murco (a Bacharach Company) is an NSAI certified company.

  • Page 51: Modbus Registers

    Analog input registers are read only and use Modbus function code 04 (Read Input Register). Description Range Units Param 5.3.4 Non-Critical 30001 16-bit Current Fault Code Instrument electronics D-01 (E300) Faults 5.3.3 Instrument Electronics 30002 16-bit Last Fault Code Instrument electronics D-02 Critical (E100) Faults 30003 Software Version Instrument electronics 30004 Reserved MGS-550...
  • Page 52 Sensor 2 Type Code S2-09 1 = ppm 2 = ppb 30032 Display units Sensor 2 S2-10 3 = Vol% 4 = %LEL Full Scale in ppb, ppm, %LEL or Vol% Sensor 2. (Note: 30033 0 to 65535 Unit S2-11 MGS-550...
  • Page 53 0=Off, 1=On P1-01 40002 RS-485 Node Address 1 to 250 MB-01 40003 Baud Rate 0=9600, 1=19200 MB-02 40004 Stop Bits 1 or 2 MB-03 40005 Parity 0=None, 1=Odd, 2=Even MB-04 40006 Alarm Delay ON Value 00 to 15 Minutes AF-01 MGS-550...
  • Page 54 4 = 4 to 20 mA 40025 Analog Output 1 Scaling 20% to 100% of full scale A1-03 ±410 (can take an output 410 = 10% 40026 Analog Output 1 Offset A1-04 below zero) of full scale 40027 Analog Output 1 Full Scale PPM MGS-550...
  • Page 55 Instrument electronics 12V supply voltage x100 40048 Instrument electronics 6V supply voltage x100 40049 Instrument electronics 5.4V supply voltage x100 40050 Instrument electronics 3.3V supply voltage x100 40051 Instrument electronics temperature x100 40052 Instrument electronics tact and magnetic switch state MGS-550...
  • Page 56 Relay closed test. Setting this flag to zero closes all 3 relays simultaneously for 5 seconds. At 00005 the end of the test the relays revert to their normal operation. 00006 Relay opened test. Setting this flag to zero opens all 3 relays simultaneously for 5 seconds. At MGS-550...

  • Page 57: Ordering Information

    Ordering Information 10.1 MGS-550 Instrument Only NOTE: In the descriptions below, "MGS-550 Gas Detector" includes an instrument and one sensing head mounted directly to the instrument housing. Remote or secondary local sensors must be ordered as separate items. MGS-550 Instrument Only...
  • Page 58 10 Ordering Information MGS-550 Gas Detector, IP66 with IP66 Sensor Installed at the Factory 6600-8030 MGS-550 Gas Detector, IP66, EC, H2S, 0-200 ppm 6600-8031 MGS-550 Gas Detector, no IP rating, EC, HCl, 0-10 ppm 6600-8032 MGS-550 Gas Detector, IP66, EC, HCN, 0-30 ppm...

  • Page 59: Mgs-550 5M Remote And Second Sensing Heads

    MGS-550 Gas Detector, IP66, SC, R-513a, 0-1,000 ppm 10.3 MGS-550 5m Remote and Second Sensing Heads NOTE: Below is the MGS-550 Sensing Head Part Number Configurator. Part number format is: 6600-8ABC. NOTE: All 5m remote and second, directly mounted sensing heads must be ordered separately. Code IP66 Sensing Head Cable Type "A"...

  • Page 60: Mgs-550 Replacement Parts And Accessories

    SC, R-452a, 0-1,000 ppm SC, R-513a, 0-1,000 ppm 10.4 MGS-550 Replacement Parts and Accessories MGS-550 Replacement Parts and Accessories Replacement interface I/O PCB Assembly, MGS-550. Base PCB with terminal blocks for IP66 6600-8401 housing. 6600-8402 Replacement display PCB Assembly, MGS-550 6600-8403 Ribbon Cable, MGS-550.
  • Page 61 MGS-550 Replacement Parts and Accessories 6600-8405 Sensing Head Common Control PCBA, MGS-550 Sensing Head Front End Kit, MGS-550, IP66. Includes lock nut, nosepiece with membrane, O-ring, sensor foam spacers, and splash guard with calibration port. Also included are gaskets to be used as follows.
  • Page 62 10 Ordering Information MGS-550...
  • Page 63 10 Ordering Information MGS-550...
  • Page 64 10 Ordering Information MGS-550...

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