Monitoring relays and current monitors – The inexpensive solution for monitoring key system parameters

Monitoring relays and current 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. The current relay detects and monitors sinusoidal alternating currents in the frequency range from 45 to 65 Hz.

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Go to Product Detail Page for item 2866064

EMD-FL-3V-400 - Monitoring relay

EMD-FL-3V-400 - Monitoring relay

2866064

Monitoring relay for monitoring 3-phase voltages of 280…520 V AC, undervoltage, window, phase sequence, phase failure, asymmetry, wide range power supply unit, 2 changeover contacts

Go to Product Detail Page for item 2866022

EMD-FL-C-10 - Monitoring relay

EMD-FL-C-10 - Monitoring relay

2866022

Monitoring relay for monitoring 1-phase currents of 0 … 10 A AC/DC, overcurrent/undercurrent or window, error memory, wide range power supply unit, 2 changeover contacts

Go to Product Detail Page for item 2866077

EMD-SL-PH-400 - Monitoring relay

EMD-SL-PH-400 - Monitoring relay

2866077

Monitoring relay for monitoring phase sequence, phase failure and asymmetry, 342…457 V AC, supply from the measurement voltage, 2 changeover contacts

Go to Product Detail Page for item 2866048

EMD-FL-V-300 - Monitoring relay

EMD-FL-V-300 - Monitoring relay

2866048

Monitoring relay for monitoring 1-phase voltages of 0…300 V AC/DC, overvoltage/undervoltage or window, error memory, wide range power supply unit, 2 changeover contacts

Go to Product Detail Page for item 2885359

EMD-SL-PS- 24DC - Power module

EMD-SL-PS- 24DC - Power module

2885359

Power modules, pluggable, for EMD-SL-..., supply voltage: 20 V DC ... 30 V DC

Go to Product Detail Page for item 2867937

EMD-SL-C-UC-10 - Monitoring relay

EMD-SL-C-UC-10 - Monitoring relay

2867937

Monitoring relay for monitoring 1-phase currents of 0…10 A AC/DC, undercurrent, supply voltage can be selected via power module, 1 changeover contact

Go to Product Detail Page for item 2866093

EMD-SL-PTC - Monitoring relay

EMD-SL-PTC - Monitoring relay

2866093

Monitoring relay for temperature monitoring of the motor winding (maximum 6 PTC) with error memory for temperature sensors in acc. with DIN 44081, test function with integrated test/reset button, supply voltage can be selected via power module, 2 changeover contacts

Go to Product Detail Page for item 2866051

EMD-SL-3V-400 - Monitoring relay

EMD-SL-3V-400 - Monitoring relay

2866051

Monitoring relay for monitoring 3-phase voltages of 280…520 V AC, window, without neutral conductor connection, supply voltage can be selected via power module, 1 changeover contact

Go to Product Detail Page for item 2905597

EMD-SL-PH-690 - Monitoring relay

EMD-SL-PH-690 - Monitoring relay

2905597

Monitoring relay for monitoring the phase sequence, phase failure and asymmetry of 3-phase voltages at 208 V AC ... 690 V AC, 2 changeover contacts, with screw connection

Go to Product Detail Page for item 2885249

EMD-FL-3V-690 - Monitoring relay

EMD-FL-3V-690 - Monitoring relay

2885249

Monitoring relay for monitoring 3-phase voltages of 483…897 V AC, undervoltage, window, phase sequence, phase failure, asymmetry, supply voltage can be selected via power module, 2 changeover contacts

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

New products

New MACX-MR smart monitoring relay on a DIN rail

Smart monitoring relays

Intelligent, small, precise, and user-friendly

The new MACX-MR monitoring relay offers two intuitive methods of operation. Either with OLED and keys or with a smartphone app via NFC. This allows you to make precise settings as well as read detailed module information and error logs about measured values.

Main features

24 V AC/DC ... 240 V AC/DC integrated power supply, isolated from the measuring input
Setting accuracy: 1% of the set value
Operating temperature: -25°C … +70°C
CE, CCC, UL
Compliance with railway standard EN 50155, GB/T 25119

Your benefits

Intuitive operation thanks to high-contrast OLED display with keys as well as an app for NFC communication for making settings directly without having to check and calculate
Comprehensive error logging and error retrieval as well as configurable output contacts to distinguish between different errors
Single-channel extended measuring range to avoid wiring errors for the customer
Electrical isolation ensures a high degree of safety and accuracy

To the product list

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

Intuitive operation

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.

Troubleshooting

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.

Versatile, safe, accurate

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.

MACX-MR smartphone app

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.

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

Compact and cost-effective

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.

Quick and easy wiring

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.

Easy handling

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.

Application examples

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.

Current relays: current values at a glance

Current relays

The current relay converts sinusoidal 50 Hz/60 Hz alternating currents into binary switching signals. Current detection takes place inductively via the conductor led through the module. The switching thresholds are set roughly via internal DIP switches, with fine adjustment performed using a potentiometer on the front. A high-quality changeover contact relay with a gold layer is located on the output side. It can be operated in both open and closed circuit current behavior.

Your advantages with the current relay

Adjustable switching hysteresis
Relay changeover contact output
3-way isolation
Adjustable open and closed circuit current behavior
Switching point can be freely selected in the measuring range from 0 to 16 A AC

E-paper

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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