Bacharach MGS-401 User Manual
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Bacharach MGS-401 User Manual

Entrance monitor for commercial & industrial applications
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MGS-401 Entrance Monitor
for Commercial & Industrial Applications
Fixed Gas Detection
P/N: 1100-2527
|
Revision 1.0
User
Manual

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Summary of Contents for Bacharach MGS-401

  • Page 1 MGS-401 Entrance Monitor for Commercial & Industrial Applications Fixed Gas Detection User Manual P/N: 1100-2527 Revision 1.0...
  • Page 2 MSA Bacharach, Inc. warrants to buyer that it will convey good title to this product. MSA Bacharach’s liability and buyer’s remedy under this warranty of title are limited to the removal of any title defects or, at the election of MSA Bacharach, to the replacement of this product or parts thereof that are defective in title.

  • Page 3: About This Manual

    1. Introduction 1.1 About this Manual Thank you for investing in a MSA Bacharach MGS-401 Entrance Monitor. To ensure operator safety and the proper use of the controller, please read the contents of this manual for important information on the operation and maintenance of the instrument.

  • Page 4: General Safety Statements

    The MGS-401 can display up to (4) different diffusion gas detectors on a single 3.5” LCD screen and communication is done through a digital Modbus network. In addition, the MGS-401 can be used on larger compressor room networks with multiple doors.

  • Page 5: System Guidance

    Failure to follow this warning can result in serious bodily injury or death. 2.2 System Guidance The MGS-401 Entrance Monitor is but one piece of a complete gas detection system. MGS-400 Series Gas detectors in the monitored area can signal via digital bus, relays and/or audible and visual output.

  • Page 6: Design Features

    MGS-401 User Manual 2.3 Design Features Input Power 24VAC/DC, +20%, 7W max. Enclosure Rating IP54 Operating Temperature C to 50 Relative Humidity 0 to 95% non-condensing Altitude 6560 ft (2000 M) RS485 Modbus RTU Client for Gas Detectors Communications RS485 Modbus RTU Server for BMS...

  • Page 7: Front Panel

    MGS-401 User Manual 2.4 Front Panel Figure 2-4 - Front Panel Layout Front Panel Description Integrated visual alarm in bezel Controller Power & Fault LEDS Mute alarm button >80dB Alarm ½ “ NPT Cable Glands (x2)
  • Page 8 MGS-401 User Manual 2.5 Back of Lid Components Not populated Figure 2-5 - MGS-401 Under Lid Connections and Configuration Component Description 24VAC/DC Input/Output Modbus to Gas Detectors Modbus to BMS Remote Silence Alarm Input Forced Alarm Input Aux. Buzzer Output...

  • Page 9: Installation

    Failure to follow these warnings can result in serious bodily injury or death. 3.2 Preliminary Inspection The MGS-401 Entrance Monitor has been thoroughly inspected and tested prior to shipment from the factory. Nevertheless, it is recommended that the instrument be re-checked prior to installation.

  • Page 10: Power Wiring

    The MGS-401 Entrance Monitor features (2) ½” NPT cable fittings or 15mm cable glands that can be used for power entry wiring (item 5 in “Figure 2-4 - MGS-401 Front Panel). Alternately, ½ conduit could be used but the connection must be gasketed to ensure IP54 rating.
  • Page 11 In addition, the relay will change state and alarm if there are any faults detected with the MGS-401 Entrance Monitor or with any of the connected gas detectors. The relay can also be configured for failsafe response. See section 4.2, MGS-401 Configuration for relay settings.
  • Page 12 Bank 1 Switch 5 is used to set the Baud Rate of the Modbus network to either ‘9600’ or ‘19200’. The default Baud Rate is ‘9600’ or OFF. Bank 1, Switches 6, 7 and 8 are used to assign a Modbus ID to the MGS-401 when used on a BMS...
  • Page 13 MGS-401 Configuration 4.2.1 The MGS-401 can be configured as a ‘Controller’ or as a ‘Listener’. If there are no other Modbus ‘controllers’ on the network, the MGS-401 must be configured as a ‘Controller’, see configuration advice below. As a ‘Controller’ the MGS-401 will actively seek changes to the network data in the connected gas detectors.
  • Page 14 Bank 3, Switch 7 is used to ENABLE the Forced Alarm Input. The factory default is ‘DISABLED’ or OFF. Bank 3, Switch 8 is used to set the temperature units on the MGS-401 Entrance Monitor to either F or C. The factory default is ‘DISABLED’ or MGS-401 Final Installation Check 4.3.1...

  • Page 15: Operation

    MGS-401 Entrance Monitor will display that information on the LCD and respond with audible and visual alarms, configured relay response and other countermeasures that are connected or configured. The following graphic shows details of a single configured gas detector.

  • Page 16: Troubleshooting

    The System screen can be accessed by pressing the Silence button on the MGS-401 front panel (3) consecutive times within 3 seconds. The System screen will show some of the configuration of the MGS401. In addition, it will display any MGS-401 Fault Codes that may be present. See Section 6.1.2 Fault Codes for Fault Code details.

  • Page 17: Modbus Map

    MGS-401 User Manual Modbus Map...
  • Page 18 MGS-401 User Manual...

  • Page 19: Part Numbers

    Merchandise Authorization Number (RMA #). All returned goods must be accompanied by an RMA #. Pack the equipment securely (in its original packing, if possible), as MSA Bacharach cannot be held responsible for any damage incurred during shipping to our facility.

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