Description
The Eaton MTL4561 is a two-channel fire and smoke detector interface module designed for intrinsically safe signal transfer between hazardous and safe areas. As part of the Eaton Crouse-Hinds MTL4500 series, it provides fully floating channels, galvanic isolation, and loop-powered operation for reliable fire and smoke detection applications. The module is engineered for installation in hazardous environments requiring IECEx and ATEX compliance.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Eaton |
| Category |
Fire Detection |
| Part Number |
MTL4561 |
| Subcategory |
Fire and Smoke Detector Interface Modules |
| Product Series |
MTL4500 |
| Product Type |
Fire and Smoke Detector Interface |
| Signal Type |
Fire and Smoke |
| Number of Channels |
2, Fully Floating |
| Power Supply |
20–35 VDC |
| Power Dissipation |
0.7W Max @ 24V, 0.9W Max @ 30V |
| Current Range |
1–40 mA |
| Maximum Input Voltage |
6–30 VDC |
| Maximum Output Voltage |
28V from 300Ω |
| Response Time |
Within 5% of Final Value in 1.5 ms |
| Transfer Accuracy |
Better than 400 µA |
| Galvanic Isolation |
50V Between Safe-Area Circuits and Power Supply |
| Protection Features |
Reverse Polarity Protected Input Circuit |
| Mounting Method |
MTL4500 Series Backplanes |
| Area Classification |
Hazardous/Classified Locations |
| Hazardous Area Rating |
IECEx/ATEX Zone 0 |
| Safety Integrity Level |
SIL2 According to IEC61508 |
| EMC Compliance |
EN61326 |
| Electrical Connection |
Crimp Ferrules |
| Terminal Capacity |
Up to 2.5 mm² Stranded or Solid Conductors |
| Operating Temperature |
-20°C to 60°C |
| Storage Temperature |
-40°C to 80°C |
| Humidity |
5–95% Relative Humidity |
| Dimensions |
121.8 mm H × 15.8 mm W × 104.8 mm D |
| Weight |
140 g |
Information About MTL4561
The MTL4561 is a member of the Eaton Crouse-Hinds MTL4500 series of intrinsically safe interfaces developed for industrial process safety and fire detection systems. Designed as a two-channel fire and smoke detector interface, the module enables secure communication between field detection devices and control systems while maintaining electrical isolation. Its loop-powered architecture minimizes installation requirements while providing accurate signal transfer and fast response times. Certified for Zone 0 hazardous locations, the module is suitable for use in oil and gas, chemical processing, power generation, and other industrial applications where fire detection integrity is essential.
Key Features:
- Two Fully Floating Channels: Supports two independent fire and smoke detector circuits.
- Intrinsically Safe Design: Certified for installation in IECEx and ATEX Zone 0 hazardous areas.
- Loop-Powered Operation: Operates without a dedicated field power source.
- Galvanic Isolation: Provides 50V isolation between safe-area circuits and power supply.
- Reverse Polarity Protection: Input circuit protected against incorrect wiring connections.
- Fast Response Performance: Settles within 5% of final value in less than 1.5 ms.
- High Signal Accuracy: Transfer accuracy better than 400 µA.
- MTL4500 Backplane Mounting: Compatible with MTL4500 series backplane systems.
The MTL4561 delivers the reliability and precision required for hazardous-area fire and smoke detection interface applications.
