Our products

• 4–20 mA current input
• Self-powered by the current loop without an auxiliary power supply
• 1 Threshold adjustable via multi-turn potentiometer and open-loop detection
• 2 outputs, normally open contacts: 1 contact closed below the threshold, 1 contact closed above the threshold
both contacts open when the 4–20 mA loop is interrupted

• Functional safety level: SIL2 / SIL3 according to IEC 61508
The DSL1-35mA-A is specifically designed for applications requiring a very high level of functional safety
; its analog design allows for complete control over failure modes,
and the absence of an auxiliary power supply significantly improves the product’s reliability.

PTC protection relays
• Process and temperature inputs: Volts, mA, potentiometer, NTC, PTC for coil and winding protection in accordance with DIN 44082
• 1000-point LED measurement display
• Internal or external threshold adjustable via pushbutton or analog signal (4..20mA/0..10V)
• 1 or 2 10A changeover relay outputs
• Applications
thermal protection relays, thermostats
threshold relays for 4…20mA loops

The DSL35L is a compact relay that allows you to set a threshold—or, with th
, two independent thresholds—for an analog input signal, providing a cost-effective solution for control or protection applications.
The measured value is displayed on a 3-digit LED display.

THRESHOLD DETECTOR
• Process and temperature inputs: Volts, mV, uA, mA, AC or DC Amps, RMS, TRMS
Sensor power supply: 4–20 mA Potentiometer, frequency, Ohms Thermocouple, PT100, NTC, CTP, …
NAMUR proximity sensor (IEC 60497-5-6) Capacitive divider, strain gauge
• Special inputs Sum, difference, or average of 2 setpoint inputs
Setpoint potentiometer (multi-turn or single-turn with screw) Selection of max. or min. value across 2 inputs

• DSL1-35: 1-threshold / 1-changeover relay version
• DSL2-35: 2-threshold / 2-changeover relay version
• DSL3-65: 3-threshold / 3-changeover relay version
• DSL4-65: 4-threshold / 4-changeover relay version

• Positive or negative safety (selected via internal switch)
• Internal setpoint (potentiometer) or external setpoint (voltage, potentiometer)

The DSL35 allows you to set one or two independent thresholds for any type of analog signal; it is designed
for protection applications or simple on/off control.

High level of functional safety
• 4–20 mA current input
• 1 threshold adjustable via a multi-turn potentiometer and open-loop detection
• Positive safety: Relays activated below the threshold
• 2 electromechanical changeover contact outputs Independent relays
• Functional safety level: SIL2 / SIL3 according to IEC 61508
The DSL1-35mA-SIL threshold detector is specially designed for safety applications;
its analog design ensures a high level of reliability as well as complete control
over failure modes. It is naturally suited for protection applications.

Very high level of operational reliability
• Active or passive 4–20 mA current input with or without sensor power supply
• 1 threshold adjustable via multi-turn potentiometer and open-loop detection
• Safety mode selectable via DIP switch; relays activated above or below the threshold
• 2 outputs, electromechanical changeover contact Independent relay
• Traceability of internal components provided with the list of manufacturing operations and individual inspection sheet (Nuclear application)
• Functional safety level: SIL2 / SIL3 according to IEC 61508

The DSL1-35mA-NUC threshold detector is specifically designed for safety applications;
its analog design ensures a high level of reliability and complete control
over failure modes. It is ideally suited for use in protection applications.