The MTLx521 and the MTL4521L are loop-powered modules which enable a device located in the hazardous area to be controlled from the safe area. They can drive a certified intrinsically safe low-power load, as well as non-energy-storing simple apparatus such as an LED.

• Number of channels: One
• Location of load: Zone 0, IIC, T4-6 hazardous area if suitably certified Div. 1, Group A hazardous location
• Input voltage: 20 to 35V dc
• Hazardous-area output (MTLx521): Minimum output voltage: 13.6V at 48mA; Maximum output voltage: 24V from 180Ω; Current limit: 48mA minimum
• Hazardous-area output (MTL4521L): Minimum output voltage: 11.1V at 48mA; Maximum output voltage: 24V from 232Ω; Current limit: 48mA minimum
• Output ripple: < 0.5% of maximum output, peak to peak
• Response time: Output within 10% of final value within 100ms
• LED indicator: Yellow: output status, on when output active
• Maximum current consumption: 90mA at 24V
• Power dissipation within unit: 1.4W at 24V
• Safety description (MTLx521): Uo =25V Io =147mA Po =0.92W Um = 253V rms or dc
• Safety description (MTL4521L): Uo = 25V Io = 108mA Po = 0.68W Um = 253V rms or dc