Product details
MTL MTL4042: Explosion-Proof 2-Wire Transmitter Power & Signal Isolator
What It Does
The MTL4042 safely powers 2-wire 4-20mA transmitters in explosive zones. It creates electrical isolation between hazardous and safe areas while repeating signals to control room equipment.
Technical Details
- Brand: MTL
- Model: MTL4042
- Power Output: 28V max (18V min @20mA)
- Signal Range: 4-20mA (1-21.5mA overload)
- Speed: 20ms response time
- Accuracy: ±20µA @20°C
- Load Capacity: 0-650Ω
- Ripple: <50µA (up to 80kHz)
- Isolation: 250V AC protection
- Temp Stability: <1µA per °C change
- Power Input: 20-35V DC (50-75mA)
Wiring Guide
- Hazardous area: Connect transmitter to Terminals 2(+) & 5(-)
- Safe area: Link to Terminals 9(+) & 11(-)
- Power via Terminals 14(+) & 13(-)
- Optional terminals (3,4,7,8) for custom setups
Safety Approvals
- ATEX/IECEx: Zone 0, IIB, T4-T6
- FM/UL: Div.1, Group C
- Entity Parameters: 28V, 185mA, 4.5mH
Package & Support
- Includes: MTL4042 unit, safety certificates
- Warranty: 12-month coverage
- Global Shipping: FedEx, UPS, DHL options
Troubleshooting Tips
- Check green LED for power issues
- Verify transmitter draws <21.5mA
- Test isolation with 250V AC meter
Common Questions
- Q: Can it power 3-wire transmitters?
A: No, designed for 2-wire only - Q: Maximum cable length?
A: Depends on resistance (keep <650Ω total) - Q: Is calibration needed?
A: Self-calibrating at 20°C; verify annually - Q: Compatible with 24V systems?
A: Yes, works at 20-35V DC - Q: Replacement warranty?
A: 12-month free replacement
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