Phoenix DEK Series: Industrial Signal Conversion & Relay Modules - Selection Guide
Product Overview
The Phoenix DEK Series includes two core product lines: TR/INV signal conversion modules and REL relay interface modules. These devices provide essential signal processing and isolation functions in industrial automation systems, ensuring reliable communication between different voltage domains and protection for control circuits. Designed for 35mm DIN rail mounting with compact 6.2mm width, these modules offer robust performance in harsh industrial environments (-20°C to 50°C) while maintaining 4kV electrical isolation between input and output circuits.
Model Quick Reference Table
1. DEK-TR/INV Signal Inverter Module
| Model No. |
Product Name |
Key Features |
Application Scenarios |
| 2964319 |
DEK-TR/INV |
Signal inverter (PNP ↔ NPN conversion), switching amplifier |
Converts transistor outputs between ground-switching (NPN) and plus-switching (PNP) for device compatibility |
2. DEK-REL General Relay Modules (5V/24V Coil)
| Model No. |
Product Name |
Coil Voltage |
Contact Type |
Key Features |
Application Scenarios |
| 2941170 |
DEK-REL-5/O/1 |
5V AC/DC |
Normally Open (NO) |
1-pole, standard relay function |
Low-voltage control circuits, 5V-powered devices |
| 2941183 |
DEK-REL-5/I/1 |
5V AC/DC |
Normally Closed (NC) |
1-pole, standard relay function |
Low-voltage safety circuits requiring normally closed operation |
| 2941154 |
DEK-REL-24/O/1 |
24V AC/DC |
Normally Open (NO) |
1-pole, standard relay function |
Industrial control circuits, PLC outputs, 24V systems |
| 2940171 |
DEK-REL-24/I/1 |
24V AC/DC |
Normally Closed (NC) |
1-pole, standard relay function |
Safety interlocks, emergency stop circuits, fail-safe applications |
3. DEK-REL Special Function Relay Modules
| Model No. |
Product Name |
Coil Voltage |
Key Features |
Application Scenarios |
| 2964063 |
DEK-REL-24/1/AKT |
24V AC/DC |
Momentary action (pulse) function, LED status indicator |
Short-pulse control signals, actuator triggering, status monitoring |
| 2964050 |
DEK-REL-24/1/SEN |
24V AC/DC |
Sensor monitoring capability |
Process automation, detecting sensor status, signal conditioning |
| 2964940 |
DEK-REL-24/1/SEN/SO123 |
24V AC/DC |
Sensor monitoring with SO123 protocol interface |
Industrial networks requiring standardized sensor communication |
| 2964131 |
DEK-REL-24/1/S |
24V AC/DC |
Special contact material (AgNi+Au) for high current |
Heavy-duty switching applications, higher current loads |
| 2964500 |
DEK-REL-G24/21 |
24V DC |
Enhanced galvanic isolation (4kV), screw connection |
Safety-critical systems, medical equipment, noise-sensitive environments |
Core Technical Specifications (Universal)
| Parameter |
Value |
Notes |
| General Specifications |
|
|
| Mounting Type |
35mm DIN rail (NS 35/7.5) |
Standard industrial installation |
| Module Width |
6.2mm |
Space-saving design for dense cabinet layouts |
| Connection Method |
Screw terminals (M3 thread) |
Accepts 0.2-2.5mm² wire, 8mm stripping length |
| Electrical Characteristics |
|
|
| Input-Output Isolation |
4kV (G24/21 model) |
Protects control circuits from voltage spikes |
| Contact Rating |
3A continuous, 5A max |
Suitable for small to medium industrial loads |
| Power Consumption |
<1W (5V models); <2W (24V models) |
Low heat generation for long-term operation |
| Environmental Ratings |
|
|
| Operating Temperature |
-20°C to 50°C |
Industrial-grade temperature tolerance |
| Humidity Resistance |
95% RH (non-condensing) |
Suitable for humid industrial environments |
Application Scenarios & Recommended Models
1. Signal Conversion Between Different Logic Systems
- Requirement: Converting between PNP and NPN transistor outputs
- Recommended Model: 2964319 (DEK-TR/INV)
- Key Reason: Bidirectional signal inversion enables seamless integration of devices using different logic standards
2. General-Purpose Relay Control in Industrial Systems
- Requirement: 24V DC control circuit switching for machinery components
- Recommended Model: 2941154 (DEK-REL-24/O/1)
- Key Reason: Normally open contact provides standard control functionality for industrial automation
3. Safety Interlock Circuits
- Requirement: Reliable emergency stop or safety circuit with fail-safe operation
- Recommended Model: 2940171 (DEK-REL-24/I/1)
- Key Reason: Normally closed contact ensures circuit opens in case of power failure or module fault
4. Sensor Monitoring in Process Automation
- Requirement: Monitoring status of sensors in production lines
- Recommended Model: 2964050 (DEK-REL-24/1/SEN)
- Key Reason: Designed specifically for sensor interface applications, providing reliable status indication
5. Heavy-Duty Switching Applications
- Requirement: High-current switching in industrial machinery
- Recommended Model: 2964131 (DEK-REL-24/1/S)
- Key Reason: Special contact material (AgNi+Au) allows higher continuous current ratings
6. Enhanced Safety Systems with Galvanic Isolation
- Requirement: Medical equipment or sensitive industrial control with noise isolation
- Recommended Model: 2964500 (DEK-REL-G24/21)
- Key Reason: 4kV isolation protects against electrical noise and ground loops
Core Advantages
- Versatile Signal Handling: Convert between different voltage domains and signal types (PNP/NPN)
- Space Optimization: 6.2mm width allows up to 16 modules per 10cm rail space
- Reliable Isolation: 4kV electrical separation between input and output circuits prevents interference
- Industrial Robustness: Operates reliably in extreme temperatures (-20°C to 50°C)
- Cost-Effective: Single-module solution for signal conversion or relay control
- Easy Integration: Standard DIN rail mounting and screw terminals simplify installation
Installation & Usage Notes
- Mounting: Securely attach to 35mm DIN rail using built-in clips; ensure proper alignment
- Wiring: Use 0.2-2.5mm² stranded or solid wires with 8mm stripping length; torque M3 screws to 0.5-0.6Nm
- Voltage Verification: Confirm coil voltage matches system voltage (5V or 24V AC/DC)
- Contact Configuration: Select O/1 (NO) for standard control or I/1 (NC) for safety applications
- Heat Dissipation: Leave minimum 3mm space between modules for adequate ventilation
- Noise Reduction: For sensitive applications, use shielded cables and consider DEK-REL-G24/21 for enhanced isolation
- Maintenance: Regularly inspect terminals for tightness and clean dust from module surfaces
Summary
The Phoenix DEK Series provides essential building blocks for industrial automation systems, offering reliable signal conversion and relay control in a compact, robust package. Choose DEK-TR/INV for signal inversion needs, and select from the REL series based on your voltage requirements (5V/24V), contact type (NO/NC), and application-specific needs (sensor monitoring, heavy-duty switching, or enhanced isolation). All models feature industry-standard DIN rail mounting and are designed to perform consistently in demanding industrial environments.
