The Current Monitors DG 3302 and DG 3282 are used to monitor limit values of AC and DC currents.
- Easy configuration on front panel Measuring range and operating mode switchable, switch point and hysteresis adjustable with potentiometer
- Status indication by LED Easy monitoring and switching point adjustment
- Relay changeover contacts with high power handling or fully isolated transistor switching outputs
- True 4-port separation Protection against erroneous measurements due to parasitic voltages or ground loops
- Protective Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage
- High reliability and noise immunity No microprocessor, no integrated software
- Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant
 Datasheet |
| User Manual |
The configurable Current Monitoring Relay DG 35300 is used for limit monitoring and processing of DC and AC current signals and mV signals for current measuring with shunt resistors. A SPST relay or optionally an isolated, passive transistor switch (Open-Collector) is available at the output.
- Input for current measurement and mV shunt voltage using internal or external shunt resistor
- Easy configurable via DIP switches or via USB limit point, hysteresis and mode of operation can be directly set, limit point adjust
- Switchable timer and special functions Switch-on delay, switch-off delay and wiper function, Memory and window functions
- 3-Port-Separation protection against switching errors due to parasitic voltages or ground loops
- Extremely slim design 6.2 mm slim housing for a simple and space saving DIN rail mounting
- Optional In-Rail-Bus mounting rail connector allows for fast and economical installation
- Protective Separation acc. to EN 61140 Protects service personnel and downstream devices against impermissibly high voltage
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant (carriage and insurance paid by sender)
| User Manual |
The configurable Limit Alarm Switch DG 35200 is used for limit monitoring and processing of unipolar and bipolar standard signals. A SPST relay or optionally an isolated, passive transistor switch (Open-Collector) is available at the output.
- Universal input for current and voltage and integrated transmitter supply
- Easy configurable via DIP switches or via USB limit point, hysteresis and mode of operation can be directly set, limit point adjust also in operation via teach-in function
- Switchable timer and special functions Switch-on delay, switch-off delay and wiper function, Memory and window functions
- 3-Port-Separation protection against switching errors due to parasitic voltages or ground loops
- Extremely slim design 6.2 mm slim housing for a simple and space saving DIN rail mounting
- Optional In-Rail-Bus mounting rail connector allows for fast and economical installation
- Protective Separation acc. to EN 61140 Protects service personnel and downstream devices against impermissibly high voltage
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant (carriage and insurance paid by sender)
| Datasheet |
| User Manual |
The Limit Value Monitor DG 3101 is used to monitor measured values in 0(4) ... 20 mA and 0 ... 10 V standard signal circuits. A transmitter supply +Us is provided for the operation of 2-wire transmitters.
- Easy configuration on front panel Operating mode switchable via DIP switch, switch point and hysteresis adjustable with potentiometer
- Status indication by LED Easy monitoring and switching point adjustment
- True 4-port separation Protection against erroneous measurements due to parasitic voltages or ground loops
- Protective Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage
- High reliability and noise immunity No microprocessor, no integrated software
- Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant
| Datasheet |
| User manual |
The Limit Value Monitors DG 3202 und DG 3282 are used to monitor measured values in 0(4) ... 20 mA and 0 ... 10 V standard signal circuits. A transmitter supply +Us is provided for the operation of 2-wire transmitters.
- Easy configuration on front panel Operating mode switchable via DIP switch, switch point and hysteresis adjustable with potentiometer
- Status indication by LED Easy monitoring and switching point adjustment
- Relay changeover contacts with high power handling or fully isolated transistor switching outputs
- True 4-port separation Protection against erroneous measurements due to parasitic voltages or ground loops
- Protective Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage
- High reliability and noise immunity No microprocessor, no integrated software
- Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant
| Datasheet |
| User Manual |
The Temperature Monitors DG 3602 and DG 3632 are used for temperature control with RTD sensors in 2-wire connection.
- Easy configuration on front panel Measuring range and operating mode switchable, switch point and hysteresis adjustable with potentiometer
- Status indication by LED Easy monitoring and switching point adjustment
- Relay contacts with high power handling 2 fully isolated changeover contacts
- True 4-port separation Protection against erroneous measurements due to parasitic voltages or ground loops
- Protective Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage
- High reliability and noise immunity No microprocessor, no integrated software
- Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant
| Datasheett |
| User Manual |
The configurable switch amplifier DG 31000 is used to capture, amplify and supply of industrial binary signals. A SPST relay or optionally an isolated, passive transistor switch (Open-Collector) is available at the output.
- Universal Binary Input for all common industrial status signals
- Easily configurable via DIP switches Sensor type, action direction and mode of operation directly selectable
- Switchable timer functions Switch-on delay, switch-off delay and wiper function
- 3-Port Isolation Protection against switching errors due to parasitic voltages or ground loops
- Extremely slim design 6.2 mm slim housing for a simple and space saving DIN rail mounting
- Optional In-Rail-Bus mounting rail connector Allows fast and cost-effective installation and provides a common fault message
- Protective separation acc. to EN 61140 Protects service personnel and downstream devices against impermissibly high voltage
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant (carriage and insurance paid by sender)
| Datasheet |
| User Manual |
The Thermistor Motor Protection Relay DG 3802 protects motors und machines against over-temperature caused by heavy starting duties, braking, under-voltage, over-voltage and high switching frequencies.
- Reliable overtemperature protection Up to 6 thermistors or bimetal switches, wire break detection in the sensor input
- Fault message in closed-circuit operation 2 output relays not activated in the event of fault, restart via auto-reset
- Status indication by LED Easy monitoring and switching point adjustment
- Protective Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage
- High reliability and noise immunity No microprocessor, no integrated software
- Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant
| Datasheet |
| User Manual |
The Voltage Monitors DG 3402 and DG 3482 are used to monitor limit values of AC and DC voltages.
- Easy configuration on front panel Measuring range and operating mode switchable, switch point and hysteresis adjustable with potentiometer
- Status indication by LED Easy monitoring and switching point adjustment
- Relay changeover contacts with high power handling or fully isolated transistor switching outputs
- True 4-port separation Protection against erroneous measurements due to parasitic voltages or ground loops
- Protective Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage
- High reliability and noise immunity No microprocessor, no integrated software
- Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting
- 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant
| Datasheet |
| User Manual |
- Messgröße: Wechselspannung oder -strom
- Überlastgrenze dauernd: 1,2-fach
- Messkategorie: CAT III
- Arbeitsspannung:
- 300V
- 600V (Messbereiche > 250V..≤600V
- Verschmutzungsgrad: 2
- Schutzart
- IP 52 Gehäuse
- IP 20 Anschlüsse
 Datasheet |
- Input from Pt100 sensors in 2- or 3-wire connection
- Selectable, pre-calibrated temperature ranges
- Two relay outputs with independent switch functions
- Monostable relays for safe tripping at power failure
- SPDT relays with 6 A switch capacity
- High configuration flexibility with DIP switches
- Trip levels and hysteresis adjustable from the front
- Three front LED’s for trip indication and power supply monitoring
- 4 kV isolation between input, output and power supply
- Protective Separation acc. to EN 50178
- Universal 24 V AC and DC power supply
- DIN-rail mounting
Datasheet
- Current and voltage input
- Two relay outputs with independent switch functions
- Monostable relays for safe tripping at power failure
- SPDT relays with 6 A switch capacity
- High configuration flexibility with DIP switches
- Trip levels and hysteresis adjustable from the front
- Three front LED’s for trip indication and power supply monitoring
- 4 kV isolation between input, output and power supply
- Protective Separation acc. to EN 50178
- Universal 24 V AC and DC power supply
- DIN-rail mounting
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Datasheet
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Three-phase alternating current measuring relay
| AUX | 230 Vac |
|---|---|
| OUTPUT | 2 relays with SPDT contact |
| THRESHOLDS | 1 max + 1 min or max adjustable range 15...10 %In |
| FORMAT | rail DIN wall mounting |
| INPUT | In 5 A |
| TYPE | Three-phase alternating current measuring relay |
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Datasheet
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Three-phase alternating voltage measuring relay
| AUX | Selfsupplied |
|---|---|
| OUTPUT | 1 relay with 2 SPDT contacts |
| THRESHOLDS | 1 min + 1 max adjustable range +-20 %Un |
| FORMAT | rail DIN wall mounting |
| INPUT | Un 100 V |
| TYPE | Three-phase alternating voltage measuring relay |
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Datasheet
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Single-phase alternating current measuring relay
| AUX | 230 Vac |
|---|---|
| OUTPUT | 1 relay with SPDT contact |
| THRESHOLDS | 1 min. or 1 max. adjustable range 10...120 %In |
| FORMAT | 2 DIN module |
| INPUT | In 1 A |
| TYPE | Single-phase alternating current measuring relay |
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Datasheet
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Single-phase alternating voltage measuring relay
| AUX | 150...250 Vdc |
|---|---|
| OUTPUT | 1 relay with SPDT contact |
| THRESHOLDS | 1 min. or 1 max. adjustable range 10...120 %Un |
| FORMAT | 2 DIN module |
| INPUT | Un 400 V |
| TYPE | Single-phase alternating voltage measuring relay |
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Datasheet
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Three-phase alternating voltage measuring relay-phase failure/phase sequence/asimetry
| AUX | Selfsupplied |
|---|---|
| OUTPUT | 1 relay with SPDT contact |
| THRESHOLDS | voltage asymmetry threshold adjustable 5...25 % |
| FORMAT | 2 DIN module |
| INPUT | 380...415 V 50 and 60 Hz |
| TYPE | Three-phase alternating voltage measuring relay-phase failure/phase sequence/asimetry |
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Datasheet
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Non-priority single phase load tripping and signalling relay with instantaneous display kW-V-A
| AUX | 230 Vac |
|---|---|
| OUTPUT | 1 relay with SPST contact in voltage (250Vac/16A) |
| THRESHOLDS | intervention setup range 0...6,5 kW |
| FORMAT | 2 DIN module |
| INPUT | Voltage 195...264 V 50 Hz - Max current 28 A |
| TYPE | Non-priority single phase load tripping and signalling relay with instantaneous display kW-V-A |
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Datasheet
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Analog Threshold Signal Generators / Threshold Relays
An analog threshold signal generator (threshold relay) continuously monitors an analog input signal — such as a voltage, current or sensor output — and compares it against a predefined threshold. If the signal exceeds or falls below the threshold, the relay triggers and produces an output signal (e.g. switch output, alarm or alert). This makes threshold relays ideal for automatic monitoring, protection functions or alerting within control cabinets and installations.
These devices are usually built as compact DIN-rail modules and can be easily integrated into existing cabinets. The input is analog (voltage, current or standard signal), and the output is via relay or switch contacts — allowing actuation of alarms, control circuits or other loads. Analog threshold signal generators thus offer a simple and reliable solution for monitoring and protection tasks in measurement and control systems.
Questions & Answers on Analog Threshold Signal Generators / Relays
What is an analog threshold signal generator?
A device that monitors an analog input signal and activates a relay output when a set threshold is crossed (above or below the threshold).
Which input signals are common?
Common inputs include analog standard signals such as 0 … 10 V or 4 … 20 mA; depending on the model, direct voltage or current inputs from sensors or transmitters may also be supported.
How is the threshold defined?
Usually via a potentiometer, DIP-switch or configuration setting; some devices offer multiple thresholds (e.g. alarm and reset threshold) for more flexibility.
What output does a threshold relay provide?
Typically a relay contact (potential-free or with supply) or switch output, which can be used to trigger alarms, control relays or send signals to control or monitoring systems.
Is galvanic isolation provided?
Often yes — between input and output, to prevent interference, ground loops or potential differences, ensuring safe and reliable operation.
What are typical use cases?
Monitoring of voltage, current or analog signals for over-/under-voltage protection, current monitoring, temperature or sensor value supervision — and triggering alarms or switching actions when thresholds are crossed.
How is the device mounted?
It mounts on a DIN rail; the input signal is wired to the input terminals, the output relay contacts to the control or alarm circuits.
What are the advantages compared to discrete circuits?
Compactness, simplicity, standardized wiring, galvanic isolation, easy installation, and reliable switching — without complex wiring or programming.
Are there limitations?
Yes — threshold relays usually provide only simple switching logic; for more complex monitoring (timing, delays, logic conditions), a programmable controller or advanced monitoring system may be necessary.
When is their use recommended?
Whenever a measurement or sensor signal needs to be monitored and an automatic reaction on threshold violation is required — e.g. in industrial systems, machine controls, building automation or safety/alarm systems.