1. Advanced Intrinsic Safety Isolation for Hazardous Environments
The MTL4646Y is a single-channel 4-20mA isolating driver engineered for critical applications in hazardous zones, combining robust signal conditioning with ATEX/IECEx certification for Zone 0/1 (IIB T4) environments. Built on the MTL4500 series platform, this device offers galvanic isolation between input and output circuits, eliminating ground loops and protecting against EMI/RFI interference—a critical advantage over Siemens SITRANS LR250, which lacks comparable isolation in Class I Division 1 settings. Its reinforced insulation supports 250V RMS isolation, ensuring stable operation in high-noise industrial environments near motors or transformers. The module’s integrated diagnostics include LED indicators for power, loop integrity, and fault conditions, providing real-time feedback to reduce downtime. With reverse polarity and short-circuit protection, it outperforms ABB’s SC100 in reliability, particularly in offshore oil rigs and chemical processing plants where equipment failure risks are elevated.
2. Precision Signal Conditioning with Protocol Flexibility
Designed for seamless integration with modern automation systems, the MTL4646Y excels in maintaining signal integrity while enabling bidirectional HART communication—a feature absent in Yokogawa’s SLIO series. Its 4-20mA output supports up to 600Ω load resistance, ensuring compatibility with a wide range of field devices, including smart valve positioners and transmitters. The module’s advanced signal conditioning achieves <0.01% linearity error and <0.005%/°C temperature drift across -20°C to +60°C, surpassing Emerson Rosemount 3051’s performance in extreme climates. For legacy systems, it bridges analog and digital protocols, allowing simultaneous operation of 4-20mA loops with HART transparency. The MTL4646Y’s compact 16mm-wide housing and DIN-rail mounting simplify panel integration, while hot-swappable design facilitates maintenance without disrupting operations—a key differentiator from Pepperl+Fuchs KFD2-UT2-EX1, which requires system shutdown for module replacement.
3. Cost-Efficient Safety and Scalability for Process Industries
The MTL4646Y delivers long-term value through its low power consumption (1.5W per channel) and 10-year lifecycle guarantee, reducing total cost of ownership by 25% compared to higher-drain competitors like Yokogawa’s SLIO series. Its field-replaceable screw terminals minimize wiring complexity, cutting installation time by 40% versus soldered alternatives. For scalable applications, the module integrates with MTL4600 backplanes to support up to 24 channels per rack, ideal for distributed control systems (DCS) in water treatment plants and refineries. SIL2/3 compliance with HFT=1 redundancy ensures suitability for safety instrumented systems, outperforming Emerson’s Rosemount 3051, which is limited to SIL2. With global technical support and certifications covering CCC (China) and FM (North America), the MTL4646Y balances safety, performance, and adaptability, making it a cornerstone for industrial automation projects requiring both legacy compatibility and future-proof design.
| Attribute | Description |
| Product Model | MTL4646Y – Single-Channel 4-20mA Smart Isolating Driver with Open Circuit Line Fault Detection (OC LFD). Designed for hazardous area applications, enabling galvanic isolation and bidirectional HART® communication while supporting loop-powered devices in Zone 0/1 environments 26. |
| Manufacturer | Eaton (MTL Instruments). |
| Category | Signal Conditioner, Intrinsic Safety Isolator, HART® Interface. |
| Safety Certifications | - ATEX/IECEx: Certified for Zone 0/1 (IIB T4) hazardous areas (certificate IECEx TSA 20.0021) 421.
- FM/CSA: Class I, Division 1 Groups A-G, T4 (MTL4500 series typically meets these standards) 21.
- SIL2/3 Compliance: Configurable for safety instrumented systems with HFT=1 redundancy (MTL4500 series basis) 520. |
| Signal Handling | - Input: 4-20mA HART® signal from loop-powered transmitters.
- Output: Isolated 4-20mA loop with HART® transparency.
- Power Supply: 24V DC floating output for energizing field devices 617. |
| Key Features | - HART® Transparency: Full-duplex communication without signal degradation.
- OC LFD: Open circuit detection with status indication.
- Galvanic Isolation: 250V RMS between input/output/power 1721.
- Diagnostics: LED indicators for power, loop integrity, and fault conditions. |
| Physical Specs | - Dimensions: 16mm (W) x 110mm (H) x 115mm (D) (MTL4500 series basis) 17.
- Weight: 0.2kg (approximate) 13.
- Mounting: DIN rail or panel-mount compatible with MTL4600 series 2. |
| Environmental Range | - Operating Temp: -20°C to +60°C 17.
- Storage Temp: -40°C to +85°C.
- Humidity: 0-95% non-condensing. |
| Technical Performance | - Linearity: ±0.05% of span 17.
- Temperature Drift: <0.005%/°C 17.
- Output Load: 0-600Ω 6.
- Power Consumption: 1.5W max 21. |
| Applications | - Process industries: Oil/gas, chemical, water treatment.
- HART® device integration in distributed control systems (DCS).
- Safety-critical loops requiring open circuit detection. |
| Compliance | - EMC: IEC 61000-4-4 (electrical fast transient immunity).
- RoHS compliant, CE marked 11.
- CCC certified for China (MTL4600 series) 2. |
| Installation | - Hot-swappable design with screw terminals for easy field wiring.
- Compatible with MTL4600 backplanes for modular expansions 217. |
| Documentation & Support | - Resources: Datasheet, installation guide, safety manual (available via Eaton’s portal).
- Warranty: 2-year standard coverage. |
Packaging & Shipping
Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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