MTL5014 Dual Relay Interface - MTL Instruments

MTL5014 Dual Relay Interface

The MTL5014 from MTL Instruments provides sophisticated control for hazardous area applications. This single-channel interface enables two safe-area loads to be controlled by one switch or proximity detector. It offers advanced features including line fault detection, phase reversal, and dual relay outputs for maximum flexibility.

Key Technical Specifications

• Brand: MTL Instruments
• Model: MTL5014
• Product Type: Dual Relay Interface
• Channels: One input channel
• Outputs: Two changeover relays
• Response Time: 10ms maximum
• Supply Voltage: 20 to 35V DC

Hazardous Area Certification

• Switch Location: Zone 0, IIC, T6 hazardous area
• Detector Location: Zone 0, IIC, T4-T6 with certification
• Division Rating: Division 1, Group A hazardous location
• The MTL5014 maintains intrinsic safety for connected sensors

Input Specifications

• Input Standard: NAMUR/DIN 19234 for proximity detectors
• Sensor Voltage: 7.0 to 9.0V from 1kΩ ±10% source
• Normal Phase: Output energizes if Iin >2.1mA or Rin <2kΩ
• Reverse Phase: Output de-energizes under same conditions
• Hysteresis: 250µA typical for stable switching
• Phase Reversal: User selectable for output 1

Relay Output Characteristics

• Relay Type: Two single-pole changeover contacts
• Contact Rating AC: 250V AC, 2A, cosø >0.7
• Contact Rating DC: 40V DC, 2A, resistive load
• Contact Life: 300,000 operations at maximum load
• Response Time: 10ms maximum for fast control
• Note: Reactive loads require adequate suppression

Line Fault Detection (LFD)

• LFD Mode: User selectable - Off or On
• Open Circuit Alarm: Activated if Iin < 100µA
• Short Circuit Alarm: Activated if Iin > 6.5mA
• Fault Response: De-energizes Output 1 relay
• Contact Input: Requires 500Ω-1kΩ series and 20kΩ-25kΩ parallel resistors

Terminal Configuration

• Input: Terminal 1 (Input –ve), Terminal 2 (Input +ve)
• Earth Leakage: Terminal 3 for detection
• Output 1: Terminal 10 (NC), 11 (Common), 12 (NO)
• Output 2: Terminal 7 (NC), 8 (Common), 9 (NO)
• Power Supply: Terminal 13 (Supply –ve), 14 (Supply +ve)

Power Requirements

• Supply Voltage: 20 to 35V DC operating range
• Current Consumption: 45mA at 24V maximum
• Power Dissipation: 1.1W at 24V maximum
• Power Failure Protection: Built-in safety features

Safety Parameters

• Safety Voltage: 10.5V maximum
• Internal Resistance: 800Ω
• Safety Current: 14mA maximum
• Maximum Voltage: Um = 250V rms or DC

Frequently Asked Questions

• How many loads can the MTL5014 control?
  It can control two independent safe-area loads from one hazardous area input.
• What is the line fault detection capability?
  It detects both open circuits (<100µA) and short circuits (>6.5mA) in field wiring.
• Can I reverse the output logic?
  Yes, Output 1 features user-selectable phase reversal operation.
• What sensors are compatible?
  It works with NAMUR proximity detectors and switches in hazardous areas.