Phoenix Contact DEK-OE- 24DC_24DC_100KHZ Solid-State Relay

Technical Overview

Solid-state relay terminal block featuring 100 kHz transmission, 24 VDC input, 4-30 VDC/50 mA output, and 2.5 kV isolation.

Key Features

Includes signal inputs on PLC counter boards.
Limit frequency of up to 100 kHz.
With capacitor on the input side for interference suppression.
Equipped with yellow LED operating voltage display.
Provides basic insulation with a test voltage of 2.5 kV AC.
DIN rail mounting for easy installation.
Screw connection for secure wiring.
Features reverse polarity and surge protection in input and output circuits.

Technical Specification Matrix

Parameter	Value
Nominal Input Voltage	24 V DC
Input Voltage Range	19.2 V DC to 28.8 V DC
Typical Input Current at UN	6 mA
Output Voltage Range	4 V DC to 30 V DC
Limiting Continuous Output Current	50 mA
Transmission Frequency	100 kHz
Typical Response Time	1.5 µs
Typical Turn-off Time	2 µs
Test Voltage (Input/Output)	2.5 kV AC
Ambient Temperature (Operation)	-20 °C to 60 °C
Ambient Temperature (Storage/Transport)	-20 °C to 70 °C
Connection Method	Screw connection
Conductor Cross Section Rigid	0.2 mm² ... 4 mm²
Conductor Cross Section Flexible	0.2 mm² ... 2.5 mm²
Mounting Type	DIN rail mounting
Contact Switching Type	1 N/O contact (SPST-NO)
Color	green (RAL 6021)
Physical Weight (kg)	0.02
Dimensions L x W x H (cm)	5.6 x 0.62 x 8

Industrial Applications

1. High-Speed Signal Isolation in PLC Systems

This solid-state relay effectively isolates high-speed digital signals (up to 100 kHz) between field devices and PLCs, protecting sensitive PLC inputs from electrical noise and transient voltages in industrial control cabinets. The 2.5 kV AC insulation ensures robust separation.

Problem Solved

Protects sensitive PLC inputs from high-frequency electrical noise, voltage spikes, and ground loops while maintaining rapid signal integrity in industrial automation applications.

PLC input protectionHigh-frequency isolation2.5 kV AC insulation24 V DC control100 kHz signal processing

2. Interfacing Industrial Sensors to Microcontrollers

The relay allows for safe and reliable interfacing of 24 V DC industrial sensors to lower voltage microcontroller-based systems (e.g., 5V or 3.3V logic) by providing electrical isolation and voltage conversion (4-30V DC output). Its compact DIN rail design simplifies integration.

Problem Solved

Provides galvanic isolation and voltage level shifting between high-voltage industrial sensors and low-voltage microcontroller logic, preventing damage from potential differences and transient events.

Sensor interfacingVoltage level shiftingElectrical isolationMicrocontroller protectionDIN rail mount

3. High-Frequency PWM Control for Small DC Motors

Capable of handling a 100 kHz transmission frequency and providing a 4-30 V DC/50 mA output, this solid-state relay is suitable for precise Pulse Width Modulation (PWM) control of small DC motors or actuators. Its solid-state nature ensures fast, repeatable switching and extended operational life.

Problem Solved

Enables rapid and precise speed or position control for small DC motors using high-frequency PWM signals, overcoming the limitations and wear of traditional electromechanical relays.

PWM controlSmall DC motorsHigh-frequency switchingSolid-state outputActuator control