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 provides 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.
