MTL4023 Hazardous Area Interface: Advanced On/Off Control with Fault Detection
Core Functionality
Control hazardous-area devices from safe locations using simple contacts or logic signals. Features automatic line fault detection and optional earth fault protection. Perfect for solenoids and critical switching.
Key Advantages
• Instant fault detection during operation
• Optional earth leakage monitoring
• Triple LED status indicators
• Works in Zone 0 hazardous areas
• Fast 100ms response time
Technical Specifications
Brand: MTL Instruments
Model: 4023 (Full suffix: MTL4023-XXXX)
Output Voltage: 25V max
Control Signal: Volt-free contact/logic (1.4V-4.5V threshold)
Fault Detection: Open/short circuit monitoring
Response: 100ms activation/deactivation
Power: 20-35V DC (90-130mA)
Isolation: 250V AC
LEDs: Power (green), Output (amber), Fault (red)
Terminal Connections
Control: Terminals 10(+) & 11(-)
Output: Terminals 1(+) & 4(-)
Fault Signal: Terminals 7(+) & 8(-)
Earth Monitor: Terminal 6 (for MTL4220)
Safety Certifications
• ATEX/IECEx: Zone 0, IIC T4-T6
• FM/CSA: Div. 1, Group A
• Safety Parameters: Uo=25V, Io=147mA
Package Contents
• MTL4023 interface unit
• Terminal guide
• Safety compliance sheet
• Installation manual
Warranty & Shipping
12-month product warranty. Ships worldwide via FedEx, UPS, or DHL.
Technical FAQs
Q1: Can the MTL4023 detect both open and short circuits?
A: Yes, detects both fault types during operation.
Q2: What’s the maximum cable length supported?
A: Works with cables under 7kΩ impedance.
Q3: How are earth faults monitored?
A: Connect MTL4220 detector to terminal 6.
Q4: What do the LED colors indicate?
A: Green=power, Amber=output active, Red=fault detected.
Q5: Can I use 24V solenoids with this MTL4023?
A: Yes, handles loads up to 170Ω at 25V.
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