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MTL 755AC SHUNT – DIODE SAFETY BARRIER
- MTL 755AC
- SHUNT – DIODE SAFETY BARRIER (2 SETS OF 8 PCS)
In stock
ℹ️ Additional Information
| Condition |
BRAND NEW |
|---|---|
| Manufacturer |
EATON |
| Product Code |
200.203.02798 |
📦 Guarantee Terms
🗂️ Product Files
🖹 Description
MTL 755AC is a SAFETY BARRIER SHUNT DIODE FOR 3-WIRE RTDs 4-20mA transmitters.
- ANALOG INPUT (LOW-LEVEL)
- AC SENSOR
- 3 VOLT
- 10 OHM
Intrinsic Safety Barrier – MTL 755AC (Shunt-Diode Barrier)
This is a safety barrier module, specifically the MTL 755AC by Eaton (MTL brand). It is an intrinsic safety (IS) barrier designed to protect electrical circuits used in hazardous environments such as oil & gas, chemical plants, and marine installations.
What it is
The MTL 755AC is a shunt-diode safety barrier used to ensure that electrical signals entering hazardous areas cannot carry enough energy to ignite flammable gases or vapors. It is a critical component in ATEX and IECEx-certified systems, where explosion protection is mandatory.
Why it’s needed
In hazardous zones:
• Even a small spark can trigger an explosion
• Electrical faults can generate dangerous energy levels
👉 This barrier ensures that voltage, current, and energy remain within safe limits at all times.
What it does
- Installed between:
o Safe area (PLC, control system)
o Hazardous area (field device such as sensor or transmitter) - Limits:
o Voltage
o Current
o Available energy
This guarantees safe operation of field devices in explosive atmospheres.
How it works (simple explanation)
- Uses internal components such as:
o Zener diodes
o Resistors
o Fuses - If voltage exceeds safe levels:
o Excess energy is diverted to ground
o The circuit is protected from overvoltage
This prevents sparks or overheating that could ignite gases.
Typical system setup
PLC → Safety Barrier → Field Sensor (Hazardous Area)
The barrier acts as a protective interface between safe and hazardous zones.
Where it’s used
The MTL 755AC barrier is widely used in:
• Oil & gas facilities
• Chemical and petrochemical plants
• Refineries and fuel systems
• Marine hazardous zones (tankers, offshore platforms)
• Industrial plants with explosive atmospheres
What you see
- Slim modules mounted on DIN rail
• Each module represents one signal channel
• Multiple barriers grouped together for multi-channel systems
Compared to normal wiring
| Normal System | With Safety Barrier |
| Full electrical power | Limited safe energy |
| Risk of spark | Explosion-safe operation |
Key advantages
- Ensures intrinsic safety compliance (ATEX / IECEx)
• Protects equipment and personnel
• Prevents ignition in hazardous environments
• Reliable and simple passive design
• Easy installation in control panels
Simple explanation
In simple terms, this device is a “safety filter” for electrical signals. It makes sure that even if a fault occurs, there is not enough electrical energy to cause a spark or explosion, keeping hazardous environments safe.
