Eaton / MTL Instruments MTL5018 Resistance Isolator

The MTL5018 is a two-channel resistance isolator that interfaces switches and proximity detectors located in hazardous areas with safe-area control circuits. Each channel delivers independent relay outputs with user-selectable phase reversal to signal alarm conditions. Line fault detection (LFD) identifies open or short circuits in field wiring. The unIt has 250V RMS/DC isolation between input, output, and power terminals and conforms to intrinsic safety standards for Zone 0 and Division 1 hazardous locations. ## Technical Specifications • Channels: Two independent • Power Supply: 20 to 35V DC • Current Consumption: 60mA at 20V, 40mA at 35V • Power Dissipation: 1.4W at 24V, 1.5W at 35V • Isolation Voltage: 250V RMS or DC between power supply, hazardous-area circuits, and relay outputs • Intrinsic Safety Parameters (per channel): 10.5V, 800Ω, 14mA, Um = 250V rms or dc • Input/Output Characteristics: 7 to 9V from 1kΩ • Conductor Accommodation: Up to 2.5mm² stranded or single-core • Dimensions: 16mm unit width • Mounting: DIN-rail (Type T35 top-hat rail to EN50022, BS5584, DIN46277) • Connectors: Plug-in signal and power connectors ## Key Features • Two changeover relay outputs for safe-area load control • Independent phase reversal selection per channel for alarm signaling • Selectable line fault detection with required external resistors (500Ω–1kΩ series; 20kΩ–25kΩ parallel) • NAMUR/DIN 19234 input compatibility for proximity detectors • Green power indicator and yellow channel status LEDs ## Typical Applications • Control of safe-area loads from Zone 0 (IIC, T6) switches in intrinsically safe systems • Proximity detector interface for Group A hazardous locations (Div. 1) • Field wiring fault detection in distributed safety networks ## Compatibility & Integration The MTL5018 belongs to the MTL5000 series and supports intrinsically safe sensors in Zone 0 and Division 1 environments. Plug-in connectors enable rapid integration into DIN-rail control panels.