MTL 5074 Dual-Channel Isolator | 2-Ch, 4-20mA Input, Relay Output, IS, DIN Rail, FM/ATEX

MTL 5074 Dual-Channel Isolator | 2-Ch, 4-20mA Input, Relay Output, IS, DIN Rail, FM/ATEX

MTL 5074 dual-channel isolator specifications. 2-channel, 4-20mA input, relay output, intrinsic safety, 24V DC. FM/ATEX/IECEx approved for hazardous areas.

Product Overview

The MTL 5074​ is a dual-channel isolator/converter with relay outputs​ from MTL's 5000 series, designed to interface 4-20mA signals​ from hazardous areas and provide isolated relay outputs. This device provides intrinsic safety protection​ for two input channels, converts analog signals to relay switching functions, and carries FM, ATEX, and IECEx approvals​ for Zone 1 hazardous locations. The "5074" designation identifies this specific model configured for analog input to relay output conversion. This unit provides a versatile solution for alarm, interlock, and control applications where analog signals need to trigger discrete actions.

Technical Specifications

Note: Specifications are based on MTL 5000 series documentation. The 5074 provides two independent channels with dual setpoints each. Always verify with the latest product datasheet.

Key Features

• Dual-Channel Design:​ Two independent, galvanically isolated channels

• Four Relay Outputs:​ Two relays per channel (four total) for flexible alarm/control

• Adjustable Setpoints:​ Two independently adjustable setpoints per channel

• Configurable Hysteresis:​ Adjustable 0.5-10% to prevent relay chatter

• Intrinsic Safety:​ Approved for Zone 1 hazardous locations

• LED Status Indicators:​ Visual indication of alarm and relay status

• Easy Configuration:​ Setpoints adjusted via front-panel potentiometers

• Compact Design:​ Only 17.5mm wide for space-efficient installations

• Flexible Relay Logic:​ Configurable for normally energized or de-energized operation

• Global Approvals:​ Certified for international hazardous area applications

Setpoint and Hysteresis Configuration

Relay Contact Ratings

Entity Parameters (for Hazardous Area Design)

Note: The 5074 is an associated apparatus. Connected 4-20mA transmitters in the hazardous area must be certified as intrinsically safe or be simple apparatus.

Typical Relay Configurations

Typical Applications

• Process Alarm Monitoring:​ High/low alarm generation for pressure, level, temperature

• Safety Interlocks:​ Trip functions for equipment protection

• Pump Control:​ Automatic start/stop based on level or pressure

• Valve Control:​ On/off control based on process conditions

• Fan Control:​ Start/stop based on temperature or pressure

• Burner Management:​ Safety interlocks for combustion systems

• Compressor Control:​ Start/stop and safety shutdown functions

• Any application requiring​ relay outputs based on 4-20mA process signals in hazardous areas

Important Technical Notes

1. Field Device Certification:​ 4-20mA transmitters in the hazardous area must be certified as intrinsically safe or qualify as "simple apparatus."

2. Setpoint Adjustment:​ Setpoints are adjusted via front-panel potentiometers. Use a calibrated current source for accurate setting.

3. Hysteresis Setting:​ Proper hysteresis prevents relay chatter when the signal is near the setpoint. Typical setting is 1-2% of span.

4. Relay Load Ratings:​ Do not exceed relay contact ratings. For inductive loads, use appropriate suppression (RC networks, diodes, varistors).

5. Fail-Safe Design:​ Configure relay logic for appropriate fail-safe operation. Consider what should happen on power loss or sensor failure.

6. Power Supply:​ Use a certified intrinsically safe power supply or ensure the loop power supply meets IS requirements for the entire circuit.

7. Grounding:​ Follow manufacturer's grounding recommendations. Proper grounding improves noise immunity and safety.

8. LED Indicators:​ Green LEDs typically indicate power and normal operation. Red LEDs indicate alarm conditions.

9. Certification Compliance:​ Verify that the 5074's certifications match the hazardous area classification and temperature rating of your application.

10. Testing:​ Regularly test alarm functions to ensure proper operation. Document setpoints and test results for maintenance records.

Note: This data sheet provides general specifications for the MTL 5074 dual-channel isolator with relay outputs. For complete installation guidelines, wiring diagrams, configuration procedures, and safety instructions, consult the official MTL 5000 Series Technical Manual. Always verify that the product configuration and certifications match your specific application requirements.