MTL4521 Loop-Powered Controller | MTL Instruments

MTL4521 Loop-Powered Hazardous Area Controller

The MTL4521 from MTL Instruments provides safe control for hazardous locations. This loop-powered device requires no separate power supply for operation. It delivers reliable performance for intrinsically safe applications.

Core Features and Operation

• The unit operates on a 20-35V DC loop-powered input for simple installation.
• It safely drives intrinsically safe loads in the most demanding hazardous areas.
• The controller achieves a fast 100ms response time to reach 10% of final value.
• A clear LED status indicator provides instant visual feedback on operation.

Detailed Electrical Specifications

• Brand: MTL Instruments
• Model: MTL4521
• Output Voltage Range: Provides between 11.1V minimum and 24V maximum output.
• Current Limit: Delivers a robust output of ≥48mA for connected devices.
• Output Ripple: Maintains clean power with less than 0.5% peak-to-peak ripple.
• Power Consumption: Uses only 90mA at 24V, totaling 1.4 watts.

Safety Certifications and Compliance

• Certified for Zone 0, IIC, and T4-T6 temperature classes with approved equipment.
• Fully compliant with Division 1, Group A requirements for hazardous locations.
• Entity parameters include Uo=25V, Io=108mA, Po=0.68W for system design.

Common Applications

• Control and power for intrinsically safe LED lighting systems.
• Operation of low-power solenoid valves in classified areas.
• Interface connection for various hazardous area sensors.
• Signaling and control within process automation systems.

Installation Guidelines

• Mount the MTL4521 on a standard DIN rail in your enclosure.
• Connect the loop power input and output to field devices correctly.
• Verify all connections match the hazardous area certification requirements.
• Check that the LED indicator lights up when power is applied.

Packaging Contents

• One complete MTL4521 controller module.
• Detailed installation and operation guide.
• Required mounting screws for secure installation.

Frequently Asked Questions

• What power source does the MTL4521 need? It operates on a 20-35V DC loop-powered input.
• What is the output current capability? The device provides a minimum of 48mA output current.
• Is this certified for Zone 0? Yes, it carries Zone 0, IIC, T4-T6 certification.
• What shipping options are available? We ship worldwide using DHL, UPS, and FedEx express services.