MTL 9122-IS-PS relay isolation power supply module
MTL 9122-IS-PS is an Eaton/MTL FISCO intrinsic safety fieldbus relay isolation power supply module that supports FF H1/Profibus PA fieldbus. It is installed on a DIN rail and comes with pluggable screw terminals.
main function
- Implement safe zone/zone 2 bus signal isolation relay, isolate and forward the safe side bus signal from the control room to the zone 1 intrinsically safe danger zone network segment, providing isolated power and communication signals for on-site intrinsically safe instruments.
- Adhere to FISCO intrinsic safety regulations, enhance the power supply capability of intrinsic safety network segments, increase the number of instruments that can be mounted on a single network segment, and extend the maximum transmission distance of bus cables.
- Isolate the hazardous and safe area circuits, limit the energy transmitted to the explosive hazardous area, meet the requirements of explosion-proof intrinsic safety, and ensure stable communication and power supply of bus instruments under flammable and explosive conditions.
MTL 9122-IS-PS relay isolation power supply module
| Item | Specification |
|---|---|
| Model | MTL 9122‑IS‑PS |
| Power Supply Input | 19.2‑30 V DC |
| Max Power Dissipation | 4.1W typical, 6W maximum |
| Output Channel | 1 channel |
| Minimum Output Voltage | 13.1 V @25℃ |
| Maximum Output Current | 256mA（IIB gas group） |
| Isolation Voltage | 250V AC between host‑side and IS‑side |
| Bus Terminator | Host‑side selectable; IS‑side fixed |
| Gas Group | IIB |
| Explosion Certificate | ATEX, IECEx, FISCO compliant IEC60079‑11 / IEC60079‑25 |
| Operating Temperature | ‑40℃ ~ +70℃ |
| Protection Class | IP20 |
| Mounting | DIN rail mounting |
| Connection | Plug‑in screw terminals |
| Supported Fieldbus | FF H1, Profibus‑PA |
| Max Field Devices | Up to 16pcs @15mA per device |
| Max Cable Length | Up to 250m |
Product features
1. FISCO intrinsic safety certification: Complies with IEC60079-11, IEC60079-25 FISCO standards, IIB gas group, simplifies intrinsic safety system documentation work, supports live working in hazardous areas, Eaton.
2. Signal isolation relay+power supply integration: It combines bus signal isolation forwarding and intrinsic safety distribution functions, without the need for additional relays, and can complete network segment isolation power supply with a single module.
3. High output current capability: The maximum output is 256mA, and a single network segment can accommodate more fieldbus instruments. The cable can reach up to 250 meters, significantly improving the load and wiring distance compared to traditional intrinsic safety network segments.
4. Bus terminal resistance can be configured: The host side terminal resistance switch is optional, and the intrinsic safety side is a fixed terminal resistance, suitable for different bus topologies.
5. High isolation and voltage resistance: The safety side and intrinsic safety side are electrically isolated at 250V AC, effectively blocking the entry of fault energy into the hazardous area of Eaton.
6. Wide temperature working: -40 ℃~+70 ℃ wide working temperature, suitable for harsh industrial environments; IP20 protection, DIN rail buckle installation
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