MTL4755AC RTD Barrier | 3-Channel Intrinsic Safety Buy Now

MTL4755ac 3-Channel Barrier: Precision RTD Interface for Hazardous Zones

Perfect RTD Protection

The MTL4755ac safely connects 3-wire RTDs to control systems in explosive areas. Each module handles one full RTD sensor with three isolated channels. Features ultra-low resistance to keep measurements accurate.

Technical Excellence

• Model: MTL4755ac (3-channel RTD barrier)
• Channel resistance: 18.2Ω (Ch1), 18.5Ω (Ch2/3) ±0.15Ω
• Voltage rating: 2.3V max / 0.6V working
• Current capacity: 300mA per channel
• Power handling: 0.23W matched power
• Tracking accuracy: ±0.15Ω across temperature shifts
• Isolation: 250V AC between channels
• Temp range: -20°C to +60°C

Installation Guide

• Connect RTD wires: One wire per channel (3 wires total)
• Use shielded cables under 100m length
• Never bus power between modules
• Verify earth/floating bridge configuration

Compatibility

• All 3-wire PT100/PT1000 RTDs
• PLC analog input cards
• Temperature transmitters
• Class I Div.1/Zone 0 systems

Safety Certifications

• ATEX/IECEx: Zone 0, IIC
• FM: Class I Div.1 Groups A-D
• Entity: 3V, 10Ω, 300mA

Package & Support

• 1× MTL4755ac barrier unit
• Mounting hardware
• 12-month warranty
• Global shipping: FedEx/UPS/DHL

Expert FAQs

• Q: Can it handle 2-wire RTDs?
  A: No – designed specifically for 3-wire configurations
• Q: What’s the max cable length?
  A: 100m with 22AWG shielded cable
• Q: Does it need calibration?
  A: No – factory-calibrated tracking eliminates drift
• Q: Can I use it with 4-wire RTDs?
  A: Yes – leave one channel unused
• Q: Is external cooling required?
  A: No – operates up to 60°C ambient

Alternative Solutions

• MTL3021: Single-channel switch interface (no RTD support)
• MTL3013: Safety relay without temperature capabilities