MTL4014 Hazardous Area Interface: Relay Control with Advanced Fault Detection
Essential Functionality
Safely control equipment from explosive zones using proximity sensors or switches. Features dual relay outputs and automatic line fault detection. Optional earth leakage monitoring available.
Technical Specifications
Brand: MTL Instruments
Model: 4014 (Full suffix: MTL4014-XXX)
Sensor Voltage: 7-9V DC
Activation Threshold: >2.1mA input
Deactivation Threshold: <1.2mA input
Fault Detection: <50µA (open) / <100Ω (short)
Relay Rating: 0.5A, 35V DC
Response Time: 2ms
Power: 20-35V DC (36-50mA)
Terminal Connections
Sensor Input: Terminals 2(+), 1(-)
Control Output: Terminals 7-8
Fault Signal: Terminals 10-11
Earth Monitor: Terminal 6 (for MTL4220)
Safety Certifications
• ATEX/IECEx: Zone 0, IIC T4-T6
• FM/CSA: Div. 1, Group A
• Safety Parameters: Uo=10.5V, Io=14mA
Package Contents
• MTL4014 interface unit
• Installation guide
• Safety compliance certificate
• Connection diagrams
Warranty & Shipping
12-month product warranty. Ships via FedEx, UPS or DHL.
Technical FAQs
Q1: What sensors work with the MTL4014?
A: NAMUR proximity detectors or switches with resistors.
Q2: How fast does fault detection activate?
A: Instantly when fault occurs (broken/short circuit).
Q3: Can I monitor earth faults?
A: Yes, when connecting MTL4220 to terminal 6.
Q4: What do the LED colors indicate?
A: Green=power, Amber=input active, Red=fault detected.
Q5: What’s the relay lifespan?
A: 10 million operations at rated load.










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