$ 102.35
Ensure safe motor operation with Phoenix Contact EMD-BL-PTC-PT monitoring relay. Reliable temperature protection, fast response, and compact DIN-rail design.
The Phoenix Contact EMD-BL-PTC-PT monitoring relay provides dependable temperature monitoring for motor windings and other sensitive equipment. Designed to work with up to six PTC sensors, it protects systems from overheating and helps maintain consistent performance. Its compact build and push-in connection technology make installation quick and efficient, while built-in short-circuit monitoring adds an extra layer of safety. By continuously supervising operating conditions, this relay supports smooth and cost-effective operation, reducing risks of downtime and extending the service life of critical machinery.
The EMD-BL-PTC-PT relay improves system safety by detecting overtemperature at an early stage and reacting in less than a second. Clear LED indicators make it easy to see operating status, while an integrated changeover contact enables straightforward connection to controllers or shutdown circuits. With its automatic reset function, the relay minimizes the need for manual intervention. Industries such as machine building, process control, and building automation gain significant advantages through increased reliability, reduced maintenance costs, and longer equipment life. Its slim DIN-rail design saves space, making it well suited for modern control cabinets.
Why Phoenix Contact EMD-BL-PTC-PT?
Choose the Phoenix Contact EMD-BL-PTC-PT because it combines precision temperature monitoring with robust safety features in a compact form. It’s engineered for demanding environments, offering rapid response, simple installation, and long service life. By uniting reliability with ease of use, it ensures your motors and systems stay protected without compromising efficiency.
What problem does it solve?
The EMD-BL-PTC-PT solves the critical challenge of motor overheating, a common cause of costly failures and downtime. By detecting excessive winding temperatures early and responding instantly, it prevents equipment damage, unplanned stoppages, and expensive repairs. This proactive protection safeguards productivity, making it indispensable for industries that rely on continuous, safe operation.
| Feature | Details | Benefit |
|---|---|---|
| Product Type | Temperature monitoring relay | Reliable thermal protection for motors and equipment |
| Number of Sensors Supported | Up to 6 PTC sensors (DIN 44081/44082) | Monitors multiple windings simultaneously for enhanced safety |
| Supply Voltage | 230 V AC (195.5–253 V AC) | Stable operation within industrial voltage ranges |
| Power Consumption | 3.5 VA (0.5 W) | Energy-efficient with low running cost |
| Response Delay | < 100 ms | Instant protection against overheating |
| Reset Function | Automatic reset | Reduces manual intervention and downtime |
| Output Contact | 1 floating changeover contact, max. 250 V AC | Flexible integration into control systems |
| Switching Capacity | Up to 1250 VA | Handles demanding load requirements safely |
| Connection Method | Push-in terminals, 0.14–2.5 mm² | Quick and tool-free installation |
| Dimensions | 17.5 × 89.5 × 65.5 mm (W × H × D) | Compact design saves space in control cabinets |
| Service Life (Mechanical) | 15 million cycles | Long lifespan ensures high reliability |
| Housing Protection | IP40 (housing), IP20 (terminal) | Suitable for standard industrial environments |
| Operating Temperature | -25 °C to +55 °C | Dependable performance across wide conditions |
| Country of Origin | Austria | European manufacturing quality |
Download Phoenix Contact EMD-BL-PTC-PT (2906253) Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4055626053745 |
| Tariff Number | 85364900 |
| Weight per Piece | 72 g |
| Country of Origin | Austria |
In modern vehicles, small DC motors drive functions like mirrors, locks, and seat adjustments. When these motors stall due to obstruction or excessive force, heat builds quickly. A PTC sensor integrated with a monitoring relay responds by sharply increasing resistance, cutting current before the winding overheats. This rapid self-protecting action prevents damage to the motor and associated electronics. As a result, automotive manufacturers rely on this technology to ensure comfort features remain reliable over years of use while avoiding expensive repairs from burnt-out components or electrical shorts.
Industrial motors often run under heavy load or in environments with poor cooling. Overheating can silently degrade insulation and lead to sudden breakdowns. Embedding PTC sensors into motor windings enables continuous internal temperature feedback. When the relay detects unsafe heat levels, it triggers protective action such as shutdown or alarm signaling. This early intervention preserves the health of the motor, reduces maintenance intervals, and prevents costly unplanned stoppages. By combining internal sensing with fast relay response, factories gain a proven safeguard against one of the most common causes of motor failure.
When power supplies, inverters, or chargers are first switched on, large capacitors draw a sudden rush of current. Left unchecked, this surge stresses circuit components and can shorten their lifespan. A PTC sensor configured for inrush limiting resists strongly at the initial surge, absorbing the peak load. As it heats and stabilizes, its resistance falls to allow normal current flow. This simple yet effective method protects semiconductors and capacitors from wear, extends equipment life, and keeps power systems operating smoothly. It is a cost-efficient alternative to more complex surge protection designs.
During the manufacturing of electric motors, windings are often impregnated with resin that must cure under elevated temperatures. Sensors installed in the windings must withstand this stage without losing accuracy for long-term monitoring. PTC thermistors designed for such use remain stable throughout curing and continue to provide precise temperature feedback once the motor is in service. This ensures that, even after harsh production processes, the finished motor maintains dependable thermal protection. Manufacturers value this reliability because it guarantees consistent product quality and long-lasting performance in the field.
| Category | Model Name | Part Number | Benefits |
|---|---|---|---|
| Monitoring Relay | EMD-BL-1TS-230 | (Phoenix Contact series item) | Expands monitoring to additional electrical or thermal parameters. |
| Mounting Accessory | NS 35 DIN Rail | Standard Rail | Provides secure and standardized installation in control cabinets. |
| Terminal Blocks | Push-in Terminal Blocks PT Series | Various (e.g., 3209517, etc.) | Ensures reliable wiring and fast tool-free connections. |
| Interface Relay | PLC Interface Relay | Multiple series | Extends switching capacity and improves control integration. |
| Power Supply | TRIO Power, QUINT Power | Multiple series | Delivers stable voltage, ensuring uninterrupted relay operation. |
| Protection Device | CB Series Circuit Breakers | Multiple series | Adds overcurrent and short-circuit protection to connected loads. |
| Temperature Sensor | PTC Thermistors (DIN 44081/44082) | Standard PTC Sensors | Provides accurate temperature detection for motor windings. |
For expert guidance before placing your order.
Warranty – 1-year warranty for your peace of mind.
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Technical Support – Contact us for professional after-sales technical assistance.
