Product Description
MTL MTL7728P Shunt-Diode Safety Barrier
- Manufacturer: Measurement Technology Ltd (MTL), part of Eaton's Crouse-Hinds series
- Model/Part Number: MTL7728P+
- Description: Shunt-Diode Safety Barrier
Overview
- The MTL7728P+ is a shunt-diode safety barrier designed for intrinsic safety applications in hazardous areas. It limits the transfer of electrical energy to prevent ignition in explosive atmospheres, making it suitable for connecting safe-area equipment to devices in Zones 0, 1, or 2. The barrier is commonly used in industries like oil and gas, chemical, and process automation to protect circuits for instrumentation, sensors, and control systems.
Technical Specifications
| Specification | Details |
|---|---|
| Model | MTL7728P+ |
| Series | MTL7700 Intrinsic Safety |
| Type | Shunt-Diode Safety Barrier |
| Safety Parameters | Uo: 28 V, Io: 93 mA, Po: 0.65 W |
| Maximum Safe Voltage (Um) | 250 V rms or dc |
| Resistance | 300 Ω (end-to-end) |
| Channels | Single channel, positive polarity |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +80°C |
| Mounting | 35 mm DIN rail |
| Connection | Removable terminals |
| Certifications | ATEX: II (1) GD [Ex ia] IIC, IECEx, FM, CSA |
Additional Information
- Functionality: The MTL7728P+ provides intrinsic safety by limiting voltage and current to safe levels for hazardous-area devices, such as transmitters, solenoids, or switches. It features removable terminals for easy installation and maintenance, bussed power feed compatibility, and electronic fusing for enhanced reliability. The barrier is a direct replacement for the MTL700 series, maintaining compatible terminal numbering and safety descriptions.