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Monitoring Relay

Monitoring | Monitoring relays, timer relays, function blocks

 

The requirements pertaining to safety and system availability are constantly increasing - regardless of the industry. Processes are becoming more and more complex, not only in mechanical engineering and the chemical industry but also in plant and automation technology. The requirements for power engineering are also constantly on the rise.

The INTERFACE Monitoring product range comprises various products for the conversion, measurement, and monitoring of electrical parameters: current and voltage transducers, current transformers, monitoring relays, timer relays, and special function modules.

Electronic monitoring relays EMD
EMD series offers a cost-effective solution in performing various monitoring tasks in process technology, system engineering, and power engineering: current, voltage, phase parameters (phase sequence, phase failure, asymmetry), effective power, load monitoring (cos φ), motor winding temperature, liquid level.

Electronic timer relays ETD
Compact timer relays of 6.2mm width with an adjustable time range can be used for simple time control functions.

Two product ranges are available: compact timer relays and multifunctional timer relays.

Special function modules
In special function modules, simple functions are integrated down to component level, packaged for industrial use, and provided with a professional connection method: diode modules, lamp testing modules, display modules, motor attenuation module.

 

Single-phase current monitoring 
The monitoring relays EMD-...V... monitor the direct and alternating currents from 0...100 mA to 0...10 A.
The times for starting override (only for EMD-FL-...) and response delay can be set using the potentiometer. The operating states are displayed by LEDs. Floating PDT contacts are available as signal outputs. 
 
 
 
 
 

EMD-FL-C-10

EMD-SL-C-UC-10

EMD-SL-C-OC-10

Monitoring range

10mA - 10A AC/DC

10mA - 10A AC/DC

10mA - 10A AC/DC

Relay output

2 PDT

1 PDT

1 PDT

Supply

     

With power module EMD-SL-PS...

  Yes Yes

With power module EMD-SL-PS45...

     

Wide-range power unit 24-264 V AC/DC

Yes    

Frequency range

48 - 400 Hz

48 - 63 Hz

48 - 63 Hz

Functions

     

Undercurrent

Yes Yes  

Overcurrent

Yes   Yes

Window function

Yes    

Single-phase voltage monitoring
The monitoring relays EMD-...C... monitor the direct and alternating currents from 0...30 V to 0...300 V.
The times for starting override (only for EMD-FL-...) and response delay can be set using the potentiometer. The operating states are displayed by LEDs. Floating PDT contacts are available as signal outputs. 
 
 
 
  EMD-FL-V-300 EMD-SL-V-UV-300

Monitoring range

3 - 300V AC/DC 3 - 300V AC/DC

Relay output

2 PDT

1 PDT

Supply

   

With power module EMD-SL-PS...

  Yes

With power module EMD-SL-PS45...

   

Wide-range power unit 24-264 V AC/DC

Yes  

Frequency range

48 - 400 Hz

48 - 63 Hz

Functions

   

Window function

Yes  

Undervoltage

Yes Yes

Surge voltage

Yes  
     
Three-phase voltage monitoring  
The monitoring relays EMD-...-3V... monitor interlinked AV voltages.
The voltage monitoring device EMD-SL-3V-400-N monitors the voltafe of the individual phases in the three-phase 400 V system for overvoltage or undervoltage in relation to the neutral conductor.
The response delay can be set using the potentiometer. The operating states are displayed by LEDs. Floating PDT contacts are available as signal outputs. 
 
 
 
 
  EMD-FL-3V-400 EMD-FL-3V-500

EMD-FL-3V-690

Monitoring range

3 x (320 - 480V) AC 3 x (400 - 600V) AC

3 x (550 - 830V) AC

Relay output

2 PDT

2 PDT

2 PDT

Supply

     

With power module EMD-SL-PS...

     

With power module EMD-SL-PS45...

  Yes Yes

Wide-range power unit 24-264 V AC/DC

Yes    

Frequency range

48 - 400 Hz

48 - 63 Hz

48 - 63 Hz

Functions

     

Window Function

Yes Yes Yes

Undervoltage

Yes Yes Yes
Surge voltage      

Phase sequence

Yes Yes Yes
Phase failure Yes Yes Yes
Asymmetry 5...25% / OFF 5...25% / OFF 5...25% / OFF
       
 
 
 
 
  EMD-SL-3V-400 EMD-SL-3V-400-N

EMD-SL-PH-400

Monitoring range

3 x (320 - 480V) AC 3 x (320 - 480V) AC

3(N) 342 - 477V AC

Relay output

1 PDT

1 PDT

1 PDT

Supply

     

With power module EMD-SL-PS...

Yes Yes  

With power module EMD-SL-PS45...

Yes    

Wide-range power unit 24-264 V AC/DC

Yes    

Frequency range

48 - 63 Hz

48 - 63 Hz

48 - 63 Hz

Functions

     

Window Function

Yes Yes  

Undervoltage

     
Surge voltage      

Phase sequence

 

  Yes
Phase failure     Yes
Asymmetry     Set 30%
       
Temperature monitoring (motor winding) 
The monitoring relays EMD-SL-PTC monitors the motor winding temperatures by means of PTC (PTC thermistor resistance) as per DIN 44081. If the PTC total resistance is less than 3.6 kW (normal temperature of the motor) when the supply voltage is applied, the output relay picks up. If the total resistance rises abive 3.6 kW (at least one of the PTCs has reached the nominal switch-off temperature), the output relay drops out. The output ralay picks up again when the total resistance has dropped below 1.8 kW again after the PTC has cooled down, and either an internal or external reset button has been passed or the power supply interrupted.
   
 
 
  EMD-SL-PTC

Monitoring range

< 1.8kW ...≥ 3.6kW

Relay output

2 PDT

Supply

 

With power module EMD-SL-PS...

Yes

With power module EMD-SL-PS45...

 

Wide-range power unit 24-264 V AC/DC

 

Frequency range

 

Functions

 

Thermistor monitor

Yes
   
Load monitoring (cos φ) 
The monitoring relay EMD-FL-PF-400 is a cos φ monitor for load monitoring in one or three-phase networks with adjustable theshold values, separately adjustable starting override and response delya.

Phase monitoring
The monitoring relay EMD-SL-PH-400 monitors linked AC voltages with and without neatural conductors for phase sequence, phase failure and asymmetry. The value asymmetry is set to 30%.

     
 
 
 
  EMD-FL-PF-400 EMD-SL-PH-400

Monitoring range

3 x 415 / 240V AC

400V (3 x 400 / 230V AC

Relay output

2 PDT

1 PDT

Functions

   

Window function

Yes  

Underload

Yes  

Overload

Yes  
Phase sequence   Yes
Phase failure   Yes
Asymmetry   5...30% / OFF
     

Filling level monitoring (cos φ) 
The monitoring relay EMD-SL-LL-230 monitors the level of electricity conductive liquids with the help of conductive probes (not included in the scope of supply). 
The sensitivity can be set from 0.25...100 kW. The rotart switch can be used to select the following functions:
- Pump up: Pump up or minimum monitoring
- Pump down: Pump down or maximum monitoring

A switch-on and release delay can be set using the rotary switch for sense wave and foam formation.

   
 
 
  EMD-SL-LL-230

Functions

Pumping up (max.)Pumping down (min.)
Input Conductive probe, type: SK1, SK2, SK3

Relay output

2 PDT

Compact timer relay 6.2mm width 
The compact timer relays ETD-BL-1T-... with a design width of just 6.2 mm save up to 70% space in the control cabinet as compared to the conventional timer relays. 
With an adjustable time and a pre-defined function, this compact timer relay is ideal for simple applications.
The supply of 24 V DC voltage and a PDT in the output result in a wide usage range.
       
 
 
 
 
ETD-BL-1T-ON-... ETD-BL-1T-ON-CC-... ETD-BL-1T-OFF-CC-...

ETD-BL-1T-F-...

Time replay with switch-on delay (voltage controlled) and an adjustable time range Time replay with switch-on delay (control contact) and an adjustable time range Time replay with off delay (control contact) and an adjustable time range Time replay with flasher function (beginning with the pulse) and an adjustable time range
       
Multifunctional timer relay 
The four variants of the multifunctional timer relays ETD completely cover the range of classic applications.
Each of these devices is a practical combination of functionalituy with extrememly simple operation. The adjustable time ranges have been kept as weide as possible to allow them to be used in universal applications. The timer relay applications are therfore to be found not only in the ms range, but also in the range of days.
The desired function can be set using the rotary switch.
       
 
 
 
 
ETD-FL-2T-DTI ETD-SL-1T-DTF ETD-SL-2T-I

ETD-SL-1T-S

Multifunctional timer relay with two settable times Multifunctional timer relay with one settable times Impluse encoder with settable pulse and pause times

Star/delta timer relay 

Diode modules 
Diode circuits fulfill the most varied requirements in electrical and, above all, electronic control systems, for example:
- The electrical decoupling of messages in fault warning systems or
- As spark arrester diodes for damping surge voltages of inductive consumers, e.g. solenoid valves, direct voltage relays etc.
Due to these requirements, diode modules are available as "diode gates" with common anode or cathode or as diodes for free assignment.
   
 
 
EMG...-DIO EMG...-DIO
Wtih diode type 1 N 4007  With diode type 1 N 5408
   

Lamp testing modules 
Lamp test cicuits, which decouple signals so that they are non-interacting, can be designed with two module versions:
- The diodes are connected in pairs, and circuit connections can be freely made to the anodes.
- For ach diode pair, one anode is connected to a common point.

   
 
 
EMG45-.../LP EMF 90-.../LP
   
Display modules 
Light indicator modules facilitate the monitoring of sequences of eletronic control systems and are a useful troubleshooting tool. The LEDs can be labaled individually.
   
 
 
EMG 22-LED EMG 45-LED
Display module with seven LEDs/glow lamps Display module with 14 LEDs
   
Motor attenuation modules for 3-phase motor 
Inductivities of motors or contactor coils can superimpose DC and AC circuits with dangerous voltages. RC elements have proven to be suitable for attenuation.
The compact motor attenuation modules for star-connected circuits can be installed in the terminal boxes on-sit, i.e. far away from elctrical control systems.
Suitable RC elements for ranges from 4 to 7.5 kW are selected according to:
- Operating voltage
- Three-phase performance
 
 
EMG 17-RC/.../S
Motor attenuation module for star circuit
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