Danfoss MCX - User Manual

www.danfoss.com/mcx
Save time and money with MCX
controllers and MMIMYK interface
To make the correct installation of your MMIMYK please follow this
programming guide
User manual

Summary

Introduction to MMIMYK

Purpose of the Document

Details the MMIMYK's functions as a programming module, gateway, and data logger with a graphic display and keyboard.

References for Fieldbus Installation

Provides links to guidelines for CAN and RS485 fieldbus installation on the Danfoss website.

Definitions and Abbreviations

Explains key terms like EMC (Electromagnetic Compatibility) and EMI (Electromagnetic Interference).

MMIMYK Installation Guide

MMIMYK Power Supply Options

Explains how MMIMYK can be powered via direct connection to MCX, network connection, or external power.

MMIMYK Mounting Recommendations

Advises on mounting MMIMYK on a DIN-rail in a vibration-free environment for optimal performance.

General Considerations for MMIMYK Use

Ensuring Reliable USB Connectivity

Key points for reliable USB connection: cable holder, length, type, shielding, and placement away from noise sources.

Data Logging Power Supply

Recommends 24 Vac power for data logging and notes MMIMYK's ability to save data during power failures.

USB Gateway Reliability Factors

Discusses how PC USB host interface quality impacts USB gateway reliability in noisy environments.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The MMIMYK is an advanced "all in one" device designed to perform multiple functions, including acting as a programming module, a gateway, and a data logger. It features a bright graphic display and a keyboard, enabling users to configure the module for various functions. To extend its memory capacity, the MMIMYK also includes a slot for an MMC (Multi Media Card).

Function Description

The MMIMYK serves as a versatile tool for managing and interacting with MCX controllers and other devices within a network. Its primary functions are:

• Programming Module: When directly connected to an MCX controller, the MMIMYK can supply power to the MCX and facilitate programming. This direct connection simplifies the setup for configuration tasks.
• Gateway: The MMIMYK functions as a CAN/RS485 to USB gateway, allowing communication between different fieldbus networks and a host device, such as an industrial PC. This gateway capability is crucial for integrating MCX controllers into broader control systems and for remote monitoring or configuration.
• Data Logger: The device is capable of logging data, which is particularly useful for monitoring system performance over time. In fixed installations, the 24 Vac power supply is recommended for data logging, as it ensures that in the event of a power failure, the MMIMYK retains enough energy to save all the last acquired data to the memory card. This feature is vital for maintaining data integrity and providing historical insights into system operations.

Usage Features

The MMIMYK is designed for flexible power supply options and robust connectivity:

• Multiple Power Sources: The MMIMYK can be powered through several sources:

  • Direct Connection to MCX: When used as a programming function, the MMIMYK can draw power directly from the MCX controller via an RJ11 connection. This connection also provides the CANbus link.
  • 24 Vac or 12 Vdc Jack: The device can be powered via a 24 Vac or 12 Vdc jack. It's important to note that this supply is not isolated with respect to CANbus or RS485. If the system includes other non-isolated power supply devices, the MMIMYK should have a dedicated supply to prevent potential issues.
  • USB Port: The MMIMYK can be supplied with power from the host USB port. Users should ensure that the USB port is a "high-current" type, capable of supplying up to 500 mA, as per USB 2.0 specifications, given the MMIMYK's potentially high current consumption. The USB port on the MMIMYK is galvanically isolated from the fieldbus connections, enhancing safety and reducing interference.
  • Network Connection (MYK powered by MCX or externally powered): In a network setup, the MMIMYK can either be powered by an MCX controller or by an external 12 Vdc or 24 Vac supply. This flexibility allows for integration into various network architectures.

• Connectivity:

  • RJ11: This connection not only supplies power to the MMIMYK but also directly provides the CANbus connection when linked to an MCX.
  • USB: The USB port facilitates connection to a host device for gateway and data logging functions. Special attention is required for reliable USB connections, especially in industrial environments.
  • CANbus and RS485: The MMIMYK supports both CANbus and RS485 fieldbus connections, enabling broad compatibility with different industrial communication standards.

• User Interface: The device features a bright graphic display and a keyboard, allowing for direct configuration and interaction with the module's functions without necessarily needing an external computer for basic setup.

Maintenance Features

While the manual primarily focuses on installation and usage, certain aspects contribute to the device's reliability and ease of maintenance:

• Robust Installation Guidelines: The manual provides detailed guidelines for correct installation, particularly when the MMIMYK is used as a gateway or data logger. Adhering to these guidelines helps prevent problems and ensures optimal performance.

• Mounting: The MMIMYK is designed for convenient mounting on a DIN-rail, which is a standard practice in industrial control cabinets, simplifying installation and organization.

• Vibration Resistance: It is recommended that the cabinet where the MMIMYK is mounted be mainly vibration-free. This consideration helps prevent problems with the USB connector or memory card, thereby extending the device's lifespan and ensuring stable operation.

• Electromagnetic Compatibility (EMC) and Electromagnetic Interference (EMI) Considerations: The manual emphasizes the importance of EMC/EMI considerations, especially for reliable USB connections in electromagnetically noisy environments. Recommendations include:

  • Placing a cable holder close to the MMIMYK to keep the USB connector firmly in place.
  • Using a short (less than 1 meter), shielded USB cable, possibly with a ferrite clamp.
  • Routing the USB cable far from noise sources such as inverters, motors, and contactors.
  • Placing ferrite clamps on RS485 and CANbus cables close to the MMIMYK.
  • Referring to specific guidelines for CAN and RS485 fieldbus installation to ensure proper network setup and minimize interference.

• Data Integrity for Data Logging: The recommendation for a 24 Vac power supply in fixed data logging installations, coupled with the device's ability to save data during power failures, highlights a key maintenance-related feature. This design choice ensures that valuable logged data is not lost, reducing the need for data recovery efforts and improving the overall reliability of monitoring systems.

The MMIMYK's design and recommended installation practices aim to provide a reliable, versatile, and user-friendly solution for programming, gateway, and data logging applications within industrial control systems, particularly those utilizing MCX controllers.

Danfoss MCX Specifications