MTL4021 Safety Interface | MTL Instruments

MTL4021 Hazardous Area Control Interface

The MTL4021 delivers reliable control for safety-critical applications in hazardous environments. This robust interface drives solenoids and alarm devices with complete safety assurance. It operates effectively in explosive Zone 0 areas with full certification. The unit provides dual control inputs for safety override functionality and system flexibility.

Core Technical Specifications

• The interface delivers 25.5V DC maximum output voltage for field devices.
• It provides 110mA current capacity for driving various loads.
• A fast response time of 100ms ensures quick system activation.
• The unit accepts override input of 1.4V for ON and 4.5V for OFF states.
• It operates from a wide power range of 20-35V DC for flexibility.
• The device provides 250V AC isolation for complete circuit protection.

Key Features & Capabilities

• The interface offers dual control inputs for safety override functions.
• It safely drives solenoids and alarm devices in hazardous areas.
• The unit carries full certification for Zone 0 explosive areas.
• It supports earth fault detection readiness with additional modules.
• Clear LED status indicators provide immediate operational feedback.

Detailed Technical Information

• Control Input: Terminals 10/11 with 1.4V low and 4.5V high logic
• Override Input: Terminals 8/9 for emergency switch control
• Output Rating: 25.5V maximum at 232Ω output impedance
• Signal Quality: Maximum 0.5% ripple for clean power delivery
• Power Requirements: 1.3W normal operation, 1.9W peak consumption

Installation Guidelines

• First, mount the unit in a safe area enclosure or control panel.
• Then, connect field devices to terminals 1 and 4 for output.
• Next, wire control signals to terminals 10 and 11 for operation.
• Optionally, connect override controls to terminals 8 and 9.
• For enhanced safety, add MTL4220 module for earth fault detection.

Industrial Applications

• Critical for oil and gas emergency shutdown systems.
• Essential for chemical plant alarm and warning systems.
• Reliable for mining safety control applications.
• Secure for fuel storage and handling systems.
• Trusted for pharmaceutical production safety.

Shipping & Packaging

• The package contains one MTL4021 control interface unit.
• You receive all necessary mounting hardware and accessories.
• Complete installation documentation and sheets are included.
• We ship worldwide via DHL, FedEx, and UPS carriers.
• The interface is ready for immediate deployment upon arrival.

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