Stahl ET-436-A-TX Bus Transceiver Module

1. Product Type
ET-436-A-TX is a type of explosion-proof optical fiber / electrical signal isolation transmitter / bus transceiver module, belonging to the Stahl ET series of intrinsically safe signal interface units, specifically designed for Zone 0/1/2 flammable and explosive chemical, oil and gas, and pharmaceutical scenarios.
2. Core Hardware and Explosion-proof Specifications
Explosion-proof certification: Ex ia IIC T6 Ga (the highest level of intrinsically safe explosion-proof, suitable for Zone 0 hydrogen gas-level hazardous environments); Protection level: IP30
Interface Definition
TX = Transmit signal transmitting unit, used in pairs with ET-436-A-RX receiving unit
Type A: Standard 4–20mA analog signal loop compatibility, compatible with two-wire transmitters
Power Supply: Isolated intrinsically safe circuit power supply (safety side 24VDC, intrinsically safe output on the hazardous side)
Isolation Strength: High and low voltage electrical isolation ≥ 2500V AC, blocking ground loop interference, surge impact
3. Key Functions
Intrinsically safe energy isolation: Limiting the current and voltage sent to the explosion-proof area, meeting ATEX/IECEx explosion-proof specifications, and not igniting flammable gases
4–20mA analog signal lossless conversion: Bidirectional signal transmission between the safety control room and the explosion-proof instrument on site
Electromagnetic interference resistance: Stable transmission of measurement signals in industrial strong frequency conversion, motor interference environments
DIN rail installation: Standard 35mm rail, compact control cabinet layout, compatible with DCS/PLC systems (ABB, Siemens, Honeywell, etc.)

4. Typical Complete Pairing
Transmit: ET-436-A-TX (explosion-proof site side)
Receive: ET-436-A-RX (safety control room side)
It can also be used as an intrinsically safe isolation barrier independently, compatible with standard two-wire pressure, temperature, and level transmitters.
5. Operating Conditions and Application Scenarios
Oil drilling platforms, refineries, LNG storage areas (Zone 0/1)
Fine chemical, pharmaceutical solvent workshops, paint production lines
Hydrogen energy filling stations, battery factory high-risk sections