TMT85 Temperature Transmitter FF Bus Manual Download
This article provides a download of the Chinese manual for the TMT85 temperature transmitter (FF bus type), and provides detailed explanations around its technical features, installation and wiring, configuration setup, and common issues.
Download TMT85 Chinese Manual.pdf
Product Overview
TMT85 is a temperature transmitter that supports the Foundation Fieldbus (FF) bus, and can convert sensor signals such as RTDs and thermocouples into digital bus signals.
It is suitable for temperature measurement in the process industry, featuring high accuracy, strong interference resistance, and remote configuration.
Core Features
- Supports FF H1 bus protocol, communication rate 31.25 kbps
- Input types: RTD, TC, resistance, voltage
- Measurement accuracy: ±0.1°C (RTD)
- Ambient temperature: -40~85°C
- Protection rating: IP66/67
- Remote parameter setting and diagnostics via FF configuration tools
Technical Parameters
| Parameter | Specification |
|---|---|
| Input type | Pt100, Pt1000, Cu50, Cu100, B, E, J, K, N, R, S, T, etc. |
| Output signal | Foundation Fieldbus H1 |
| Supply voltage | 9~32 VDC (bus powered) |
| Accuracy | ±0.1°C (Pt100) |
| Long-term stability | ≤0.1°C/year |
| Ambient temperature | -40~85°C |
| Protection rating | IP66/67 |
Installation and Wiring
Correct installation and wiring are key to ensuring measurement accuracy. Please follow the steps below.
Installation Steps
- Confirm that the transmitter appearance is intact, and check that the model matches the order.
- Install the transmitter in the temperature sensor junction box or on an on-site mounting bracket.
- Ensure the installation location is away from strong electromagnetic interference sources and high-temperature radiation sources.
- Tighten the housing to ensure the protection rating.
Wiring Key Points
- Sensor wiring: Connect correctly according to 2/3/4-wire system, and pay attention to resistance compensation.
- Bus wiring: The positive and negative polarity of the FF bus must not be reversed, and the shield layer should be grounded at one end.
- Terminating resistors (100Ω) must be installed at the bus terminals.
Configuration and Commissioning
Use FF configuration software (such as NI-FBUS, DeltaV, TwinCAT, etc.) to set parameters for the TMT85.
Common Configuration Steps
- Connect the transmitter to the FF bus network and ensure normal power supply.
- Open the configuration software, scan and identify the device.
- Set the sensor type, measurement unit, and upper and lower range limits.
- Configure the channel and alarm parameters of the AI function block.
- Download the configuration and observe the real-time measurement value.
Common Problems and Troubleshooting
| Symptom | Possible Cause | Solution |
|---|---|---|
| No bus communication | Reversed polarity, insufficient power supply | Check wiring polarity, measure bus voltage |
| Large measurement deviation | Incorrect sensor type, wiring resistance | Verify configuration, check three-wire/four-wire wiring |
| Device cannot be recognized | Address conflict, missing terminating resistor | Change device address, install terminating resistor |
Maintenance and Precautions
- Regularly check the housing seal to prevent water or dust ingress.
- Avoid use outside the ambient temperature range.
- Please cut off the bus power before maintenance.
- It is recommended to calibrate once a year to ensure measurement accuracy.
For the complete manual, please click the link above to download the TMT85 Chinese Manual.pdf.