ST 485C and STD 485C converters are intended for converting the signal of Pt 1000/3850 resistance-type temperature sensing elements to the digital signal of RS 485 serial bus. The standard temperature range is -50 to 150°C. Communication inputs are protected to overvoltage. In case the module is placed as terminal on the line, a terminating resistor can be attached to the wiring by shorting the contacts (the switch SW placed next to terminals for communication lines connection). All settings are stored in EEPROM memory. The electronic module is equipped with the WATCHDOG circuit, which safeguards proper program functioning in the microprocessor. These converters can be utilised in any control system compatible with communication protocol MODBUS RTU. Easy mounting of the converters is ensured by the unique “S head” design invented by SENSIT s.r.o.
The converters are designed to be operated in a chemically non-aggressive environment. The converters are made in variant:
- ST 485C – the command structure corresponds with the ModBus RTU communication protocol.
DECLARATION, CERTIFICATION, CALIBRATION
- Manufasturer provides EU Declaration of Conformity.
- Calibration – The final metrological inspection – comparison with standards or working instruments – is carried out for all the products. Continuity of the standards and working measuring instruments is ensured within the meaning of the Section 5 of Act no.505/1990 on metrology. The manufacturer offers a possibility to supply the sensors calibrated in SENSIT s.r.o.’s laboratory (according to requirements of the EN ISO/IEC 17025 standard, as amended) or in an Accredited laboratory.