Critical Technical Advantages
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Ethernet-APL Technology: This transmitter uses 2-wire Ethernet (10BASE-T1L), providing high-speed data transmission (10 Mbit/s) and power over the same pair of wires. This “last mile” digitization allows for full Ethernet connectivity into explosive atmospheres without the complexity of traditional gateways.
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Dual-Channel Universal Inputs: The TMT86 can process two independent sensor signals (RTDs, TCs, Ω, or mV). This enables advanced functions such as sensor redundancy (Hot Backup), differential temperature measurement, and drift detection between two sensors in the same thermowell.
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Integrated Web Server: For the first time, you can access the transmitter’s configuration and diagnostics directly via a standard web browser. This eliminates the need for specialized handheld communicators or proprietary software drivers during commissioning and maintenance.
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Advanced Corrosion Monitoring: Beyond standard wire-break detection, the TMT86 monitors the resistance of the sensor connections. It can identify early signs of terminal corrosion, allowing maintenance teams to intervene before the measurement signal is lost or compromised.
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Seamless PROFINET Integration: Supporting PROFINET Profile 4, the device integrates effortlessly into modern control systems. The up-to-date FDI (Field Device Integration) package ensures that device management and asset monitoring are standardized across the plant.
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Superior Accuracy with CvD Matching: By entering Callendar-van Dusen (CvD) coefficients, the transmitter is perfectly matched to the specific RTD probe. This compensates for sensor-specific manufacturing tolerances and provides elite measurement precision.
Technical Performance Matrix
| Feature | Details |
| Communication | PROFINET® over Ethernet-APL™ |
| Physical Layer | 2-wire IEEE 802.3cg (10BASE-T1L) |
| Input | 2 x Universal (RTD, TC, Ω, mV) |
| Safety Approval | ATEX, IECEx, FM, CSA (Intrinsic Safety for APL) |
| Configuration | Embedded Web Server, FDI, or Bluetooth |
| Wiring | Tool-free push-in terminals |
| Mounting | Head mount (Form B) or Field housing |
Primary Applications
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Digital Transformation (Industry 4.0): Ideal for new plant builds (Greenfield) or modernizations (Brownfield) moving toward a pure Ethernet-based control architecture.
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Hazardous Area Connectivity: Bringing high-speed digital diagnostics into Zone 0, 1, or 2 without the bandwidth limitations of HART or fieldbus.
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Critical Safety Loops: Utilizing dual-channel redundancy to ensure temperature data is never lost in high-consequence processes like chemical reactors or distillation.
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Predictive Maintenance: Leveraging the corrosion monitoring and advanced diagnostics to reduce unplanned downtime and move toward proactive service cycles.
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Complex Temperature Arrays: Monitoring average or differential temperatures in large vessels or heat exchangers with a single, high-speed digital device.
