Emerson M22, M21 Transmitter electronics module and Relay options, Board assembly diagram

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1.2.2 Transmitter electronics module and Relay options

The transmitter electronics module may be equipped with 4 electromechanical relays or 4 solid-state relays which are mounted to the main terminal board via plastic standoffs. Relay boards are field replaceable by simply unlocking the plastic standoffs with a small flat head screw driver. Remove relay board after unlocking standoffs, insert the replacement relay board, and then lock the plastic standoff with the screw driver. See Figure 3 for relay board description.

Warning Before wiring or replacement of relay boards, ensure that the power to transmitter is switched off. Do not open the transmitter enclosure in a classified area.

Warning Avoid touching electronic components, as they are susceptible to electrostatic discharge (ESD). Refer to Appendix A, “Electrostatic Sensitive Device (ESD)”.

Figure 3: Board assembly diagram

MAN-0076 Rev 05 Millennium II December 07, 2012

Net Safety Monitoring Inc

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Contents Millennium Important Information Table of Contents Monitoring and Outputs Introduction Special conditions of useEnclosure Dimensions Transmitter Enclosure Dimensional DrawingInstallation UnpackMounting Transmitter Orientation OptionBoard assembly diagram Transmitter electronics module and Relay optionsRotating Electronics module Wiring and installation Field InstallationGuidelines SealsImportant Wiring Guidelines Cable choice and guidelinesArmored Cable preparation procedure Connecting wires Remotely mounted sensors jumper configuration Separation Jumpers positionsSensor and Transmitter terminals Sensor TerminalsRemote Reset Sensor Separation/ Remote mounting of sensorWiring drawings Non-isolated terminal connectionIsolated terminal connection Installation Checklist Display Transmitter Power UpTransmitter and faceplate description Menu buttons and access Intrusive AccessNon-Intrusive Access/Magnetic Reed switch Access Status LEDNavigating main menu OperationMenu options Menu structure flow chart Full calibration Normal calibration procedure Cont’d Zero calibration option Full Calibration Enable / Disable channels Viewing and setting alarm levels pointsSetting Relay options Relay AssignmentAlarm Relay 1 RL1 Alarm Relay 2 RL2 Alarm Relay 3 RL3 Select Display Language Relay Alarm Mode setting for Oxygen sensors onlyModbus Setup Setup Current Date Setup Current TimeView Event Log Event Types Display on Screen Events Format /hostSensor Upper Limit Range Manual ResetSelf Test Relay Serial Number & Firmware Version Select Gas TypeCalibration gas value 1Fault monitoring Monitoring and outputsRelays Analog 4-20mAReg Current Output Status LED Meaning Value Red Green RS-485 Modbus RTU Reg. Value Current Output Status LED Meaning Red GreenReg# Meaning Readable Writeable Hart Communication Bit MeaningPeriodic response check TroubleshootingMaintaining Spare Parts /Accessories StorageHow to Return Equipment Appendix Appendix B Resistance Appendix C Millennium II Transmitter Specifications Approvals December 07 Net Safety Monitoring Inc

M22, M21 specifications

The Emerson M21 and M22 are advanced industrial controllers designed to enhance process automation and operational efficiency in various industries. Emerson, a leader in automation technology, introduced these models to meet the growing demands for precision, reliability, and connectivity in today’s fast-paced industrial environments.

One of the standout features of the M21 and M22 controllers is their robust processing power. They are equipped with high-speed processors that enable rapid data processing and real-time decision-making. This capability allows users to respond promptly to changing process conditions, ensuring optimal performance and minimizing downtime.

The M21 and M22 offer versatile connectivity options, supporting various communication protocols such as Ethernet, Modbus, and TCP/IP. This extensive connectivity facilitates seamless integration into existing systems, allowing for easy collaboration between devices across different platforms. Users can monitor and control processes from virtually anywhere, providing flexibility and convenience.

Scalability is another essential characteristic of the M21 and M22. These controllers can easily adapt to growing operational demands, enabling businesses to expand their automation solutions without the need for complete overhauls. Whether you're running a small system or a large, complex operation, these controllers can scale to meet your needs.

Furthermore, Emerson has incorporated advanced diagnostic and predictive maintenance features into the M21 and M22 models. These technologies leverage data analytics to predict potential failures before they occur, allowing users to take proactive measures. This not only minimizes unexpected downtime but also extends the lifespan of equipment, contributing to overall cost savings.

In terms of user interface, the M21 and M22 come with intuitive software that provides easy navigation and configuration. The interface is designed to be user-friendly, reducing the learning curve for new operators and allowing for efficient setup and management of processes.

Finally, both controllers are built with a focus on reliability and durability, making them suitable for various industrial environments, including harsh or demanding settings. Their robust design ensures consistent performance, even in challenging conditions.

In summary, the Emerson M21 and M22 controllers represent cutting-edge solutions in industrial automation, offering high processing power, flexible connectivity, scalability, advanced maintenance features, user-friendly interfaces, and robust design. Companies looking to enhance their automation capabilities will find these controllers to be valuable assets in achieving operational excellence.