Monitoring relays - The inexpensive solution for monitoring key system parameters

Monitoring relays

Monitoring relays are an inexpensive solution for monitoring important electrical and physical system parameters. EMD monitoring relays can be used to monitor overvoltage, undervoltage, overcurrent, undercurrent, phase failure, phase sequence, phase asymmetry, power factor, active power, motor winding temperature, and fill levels.

Go to Product Detail Page for item 1336410
MACX-MR-3V-690 - Monitoring relay
MACX-MR-3V-690 - Monitoring relay
1336410

3-phase voltage monitoring relay, with overvoltage, undervoltage, window monitoring as well as phase sequence, phase loss failure, asymmetry (adjustable asymmetry) and neutral monitoring functions. 24 V AC/DC … 240 V AC/DC wide range power supply, with adjustable threshold values, response delay, and supporting failure record storage and NFC communication. True RMS value test.

Go to Product Detail Page for item 1336412
MACX-MR-3V-690-PT - Monitoring relay
MACX-MR-3V-690-PT - Monitoring relay
1336412

3-phase voltage monitoring relay, with overvoltage, undervoltage, window monitoring as well as phase sequence, phase loss failure, asymmetry (adjustable asymmetry) and neutral monitoring functions. 24 V AC/DC … 240 V AC/DC wide range power supply, with adjustable threshold values, response delay, and supporting failure record storage and NFC communication. True RMS value test.

Go to Product Detail Page for item 1336404
MACX-MR-PH-690 - Monitoring relay
MACX-MR-PH-690 - Monitoring relay
1336404

3-phase voltage monitoring relay, 24 V AC/DC … 240 V AC/DC wide range power supply, monitoring for phase sequence, phase failure and asymmetry (with adjustable asymmetry and response delay). It can be configured using smart phone app via NFC wireless communication function, 1x2 PDT dry contact outputs, closed circuit principle, auto reset, optional screw connection and plug-in connection.

Go to Product Detail Page for item 1336527
MACX-MR-PTC-PT - Monitoring relay
MACX-MR-PTC-PT - Monitoring relay
1336527

Temperature monitoring relay of the motor winding (max. 2x3 PTCs) for temperature sensors according to DIN 44081 and DIN 44082 with short-circuit monitoring of the PTC thermistor circuit, dynamic line break monitoring, 2-channel detection circuit.
It can be read using smart phone app via NFC wireless communication function, 1x2 PDT dry contact outputs, closed circuit principle, manual reset, optional screw connection and plug-in connection.

Go to Product Detail Page for item 1336523
MACX-MR-PTC - Monitoring relay
MACX-MR-PTC - Monitoring relay
1336523

Temperature monitoring relay of the motor winding (max. 2x3 PTCs) for temperature sensors according to DIN 44081 and DIN 44082 with short-circuit monitoring of the PTC thermistor circuit, dynamic line break monitoring, 2-channel detection circuit.
It can be read using smart phone app via NFC wireless communication function, 1x2 PDT dry contact outputs, closed circuit principle, manual reset, optional screw connection and plug-in connection.

Go to Product Detail Page for item 1487460
MACX-MR-V-600-R-PT - Monitoring relay
MACX-MR-V-600-R-PT - Monitoring relay
1487460

1-phase voltage monitoring relay with RS-485 interface (0 V ... 600 V AC/DC), with adjustable threshold values, response delay, undervoltage, overvoltage, window monitoring functions. 24 V ... 240 V AC/DC wide-range power supply. Supports failure record storage, supports NFC communication and Modbus/RTU communication, with two configuration possibilities. 1 PDT dry contact output, plug-in connection.

Your advantages

  • Increase system availability and reduce downtime
  • Easy configuration with user-friendly user interface
  • Targeted control or shutdown when a limit value is exceeded or not met
Monitoring relay with display and buttons

Versatile monitoring functions with intuitive operation

Smart monitoring relays

The smart MACX-MR monitoring relay provides you with many monitoring functions with extended setting options, large measuring ranges, and a broad supply voltage range.

Your advantages with our smart monitoring relay:

  • High-contrast OLED display for on-site configuration and measured value display
  • Smart configuration and easy transfer of configurations with the MACX-MR app via NFC communication
  • Wide supply voltage range with galvanic isolation from the measuring circuit
  • Extended measuring ranges and high measuring accuracy with true RMS measurement
  • PIN protection against unauthorized changes
  • Precise limit value setting without checking or calculating potentiometer settings

MACX-MR monitoring relay in detail

Smart monitoring relays, configuration via display and button
MACX-TR monitoring relay, error evaluation via smartphone app
Smart monitoring relays, portfolio overview
Smartphone with configuration app for monitoring relays
Smart monitoring relays, configuration via display and button

Start a precise device configuration with the intuitive menu navigation, without long tests and calculations. Use either the easy-to-read OLED display and the pushbuttons on the device or the smartphone app with extended functions.

MACX-TR monitoring relay, error evaluation via smartphone app

Have an overview of even small deviations from normal operation. The recording of the error code, error value, value deviation, and error time help to quickly analyze and fix the cause of the error. You can configure the error output contacts to distinguish between different errors.

Smart monitoring relays, portfolio overview

Experience the versatility of the MACX-MR monitoring relay with its extended setting options, wide measuring range and wide supply voltage range. The electrical isolation of the measuring and supply circuit guarantees you high safety and accuracy.

Smartphone with configuration app for monitoring relays

Use the many options of the smartphone app to intuitively configure your monitoring relay. The extended functions include the readout and transfer of stored settings to additional monitoring relays as well as the availability of device information. A function diagram, a description, and a reminder function in the event of setting errors have been integrated into the app to ensure that making the settings is even more intuitive. The MACX-MR app is used to perform an accurate parameter configuration, which is downloaded to the device in batches. Protect the configurations of the monitoring relay against unauthorized access using a PIN code.

Four compact monitoring relays on a DIN rail

Compact monitoring relays – quick and tool-free wiring

Compact monitoring relays

The compact EMD-BL monitoring relays are ideal for simple monitoring tasks, especially in building installation and series production.

Your advantages with our compact monitoring relays:

  • Space saving with the compact installation housing
  • Easy handling with rotary switches on the housing front for parameter setting
  • Clear diagnostics with status LED
  • Ideal for series production thanks to a price-optimized solution for numerous monitoring functions

EMD-BL monitoring relays in detail

Four monitoring relays side by side with hand for size comparison
Two monitoring relays with one line wired via push-in direct-connection technology
Monitoring relay with screwdriver for setting parameters via rotary switch
Conveyor drive with motor, connector, and connection to the monitoring relay
Four monitoring relays side by side with hand for size comparison

The devices of the EMD-BL series stand out in particular due to their slim design and belong to the compact monitoring relays of our product family. With the increasing amounts of electronics in the control cabinet, lack of space is a constant challenge. With the space-saving design, our monitoring relay is ideally suited for building installation and series production.

Two monitoring relays with one line wired via push-in direct-connection technology

Reduce wiring time many times over with the proven push-in direct-connection technology. Without tools and up to 50% lower insertion forces, you reduce not only the time required but also process costs. Both voltage and phase monitoring relays are quickly installed because they are supplied from the measuring circuit.

Monitoring relay with screwdriver for setting parameters via rotary switch

Desired parameters, such as monitoring ranges and tripping delay, are set conveniently via rotary switches on the front of the housing. Easy-to-read LEDs also allow rapid on-site analysis.

Conveyor drive with motor, connector, and connection to the monitoring relay

Current monitoring: Check electrical loads for functionality or wire breaks with undercurrent monitoring and avoid overload situations or blockages with overcurrent monitoring.

Phase monitoring: Monitor all phase parameters (phase failure, phase sequence, and asymmetry) in a 3-phase network

Temperature monitoring: Detect motor heating with temperature-dependent resistors that activate the relay to signal.

Voltage monitoring: Protect machinery and equipment from the damaging effects of overvoltages and undervoltages.

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The entire portfolio at a glance

You will find our expertise in switching, isolating, and amplifying here. Select the ideal relay for your application from the range stretching from solid-state relays, electromechanical relays, coupling relays, optocouplers, monitoring relays, timer relays, right through to logic modules.

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Product family relays, optocouplers, monitoring relays, and current monitors

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