Temperature transmitters equipped with Modbus RTU output and galvanic isolation
Leslah Garland 27 July 2022 
Temperature is a key indicator in many industrial processes. Based on this principle, Tekon Electronics has announced it has developed two new head-mounted transmitters focused on acquiring the signal from various types of sensors (RTD, thermocouples, linear resistances and linear voltages) with signal output in Modbus RTU, a protocol widely used in the industry.
With this new equipment, the number of temperature monitoring/measurement solutions for process installation with Modbus RTU output has increased to three. The new transmitters THM502-I and THM602-I are an evolution of the THM501-I transmitter with Modbus RTU output and have increased the type of sensors supported as well as improvements in measurement accuracy and EMC performance.
Comparative Table | THM502-I & THM602-I
| Model | Sensor Input | Other Features | ||
| THM502-I | RTD (PT100, PT500 and PT1000) Linear Resistances | 1,5 kV AC Galvanic Isolation Modbus RTU output via RS485 Configurable Modbus parameters High accuracy and low resolution -20ºC to 80ºC operating environment | ||
| THM602-I | Thermocouples (C, J, K, N, R, S and T) Linear Voltage |
The new transmitters are designed to simplify commissioning, on-site diagnostics and maintenance. The interface incorporates operational status diagnostic LEDs that provide communications and sensor status information. It also incorporates a button to enter configuration mode, without the need to restart the equipment.