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- Manufacturer: Honeywell 
-    Part Number: MTL4015 
- Condition:New with Original Package 
- Product Type: Hazardous Area Signal Isolator 
-   Country of Origin: USA 
- Payment:T/T, Western Union 
- Shipping port: Xiamen 
- Warranty: 12 months 
Product Description
The MTL4015 Switch/Proximity Detector Interface Unit is a high-performance module from the MTL4000 Series, designed to connect field switches or proximity detectors located in hazardous areas to safe-area control systems. It enables a single sensor to control two independent safe-area relay outputs, making it ideal for applications where one signal must drive both control and shutdown systems.
This module provides galvanic isolation, ensuring safe signal transmission and protecting both field devices and control systems from electrical faults. Moreover, it includes line fault detection (LFD) for open or short circuits and earth fault monitoring, supporting comprehensive system diagnostics. The phase-reversal switch allows alarm signaling for either sensor state, offering flexibility for various control philosophies.
Engineered for the process automation, oil & gas, and chemical industries, the MTL4015 guarantees compliance with intrinsic safety standards such as ATEX, IECEx, and FM. Its compact DIN-rail design, intuitive LED indicators, and robust build make it a reliable choice for mission-critical applications.
Key Features & Benefits
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Dual Output Control: Drives two separate safe-area relay outputs from one hazardous-area input. 
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Full Galvanic Isolation: Protects systems from surges, noise, and cross-channel interference. 
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Integrated Line Fault Detection: Detects open or short circuits in sensor wiring. 
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Configurable Alarm Logic: Phase-reversal switch allows custom alarm response. 
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High Reliability: Certified for use in hazardous areas under ATEX, IECEx, CSA, and FM. 
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LED Status Indication: Provides quick visual feedback for power, signal, and fault conditions. 
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Flexible Mounting: Suitable for both DIN rail and backplane installations. 
Technical Specifications
| Specification | Details | 
|---|---|
| Model Number | MTL4015 | 
| Manufacturer | MTL Instruments | 
| Function | Switch/Proximity Detector Interface | 
| Input Type | Contact closure or proximity detector (NAMUR standard) | 
| Input Location | Hazardous area | 
| Output Type | Two independent relay outputs | 
| Output Location | Safe area | 
| Relay Contact Rating | 250 V AC / 2 A resistive load | 
| Isolation | Galvanic isolation between input and outputs | 
| Line Fault Detection (LFD) | Supported (open/short circuit detection) | 
| Earth Fault Detection | Supported | 
| Power Supply | 20–35 V DC | 
| Mounting Type | DIN rail or backplane | 
| Operating Temperature | –20°C to +60°C | 
| Dimensions (W × H × D) | 17.5 mm × 110 mm × 120 mm | 
| Weight | 200 g | 
| Certifications | ATEX, IECEx, CSA, FM | 
| Application | Dual signaling for control and shutdown systems | 
| Availability | In stock | 
FAQ
Q1: What is the main function of the MTL4015?
It interfaces a hazardous-area switch or proximity detector with two safe-area control systems via relay outputs.
Q2: Does the module include line fault detection?
Yes, the MTL4015 provides LFD for broken or shorted sensor lines.
Q3: Can it operate in high-temperature environments?
Yes, it supports temperatures from –20°C to +60°C, suitable for most industrial settings.
Q4: Is the MTL4015 suitable for SIL-rated systems?
While not certified SIL by default, it can be integrated into SIL-compliant architectures when used within MTL’s safety-rated systems.
Q5: What certifications does the MTL4015 carry?
It is certified under ATEX, IECEx, CSA, and FM for intrinsic safety in hazardous environments.
