Eaton MTL7700 DIN-rail zener barriers
MTL7700 DIN-rail zener barriers divert excess energy safely to earth using zener diodes, resistors and fuses – compact, economical, removable terminals, IS earth via the rail.
- Passive barrier using zener diodes, resistors and fuses
- Clamps onto DIN rail, making the IS earth connection
- Removable terminals for loop disconnect
- Dual-channel versions at 6.3 mm per channel
- Relay, solid-state switch and proximity detector modules
- Direct replacement for MTL700 barriers
Overview
Known for quality and reliability, MTL7700 intrinsically safe barriers use zener diodes, resistors and fuses to divert excess energy safely to ground, preventing sparking or overheating of equipment in hazardous areas.
DIN-rail mounting needs no special hardware; removable terminals ease installation and maintenance and provide loop disconnect, and angled wire entry helps wiring in tight enclosures.
Common modules
| Model | Function |
|---|---|
| MTL7728+ | 1-channel 28 V DC barrier, positive polarity |
| MTL7787+ | 2-channel 28 V DC barrier for 4–20 mA analogue inputs |
| MTL7706+ | Barrier for 2-wire 4–20 mA transmitters, HART compatible |
Applications
- 4–20 mA loops and temperature sensors
- Economical IS where a proper IS earth is available
Viet Thang Loi Technology (VTL) is Eaton's representative in Vietnam. Contact VTL for model selection and a quotation.
| Hazardous area | Zone 0, Group IIC/IIIC outputs; Zone 2 / Class I Div 2 mounting |
|---|---|
| Temperature class | T4 |
| Ambient | −20 … +60 °C (or +65 °C) |
| Mounting | T-section DIN rail, earthed via rail |
| Approvals | ATEX, IECEx, FM/CSA |
Related products
Eaton MTL 949x-PS intrinsically safe power supplies
Isolated IS power supplies: 24 V DC in, Ex ia 4.8 – 17.7 V out for devices in Zone 0/1, gas groups IIB/IIC; mount in safe area or Zone 2.
View details →
Eaton MTL4500 backplane-mounted IS isolators
Backplane-mounted intrinsic safety isolators for DCS, ESD and F&G – highest channel density, 3-port isolation, low power, many SIL-assessed models.
View details →
Eaton MTL5500 DIN-rail IS isolators
MTL5500 DIN-rail intrinsic safety isolators: slim single and multi-channel modules, 3-port isolation and removable connectors – from single loops to full cabinets.
View details →
Eaton MTL intrinsically safe fieldbus barriers
Fieldbus barriers providing intrinsically safe spurs from a high-energy trunk for FOUNDATION™ fieldbus H1 devices – mount in Zone 1/21, spurs into Zone 0.
View details →