You should consider D series Modbus RS485 thermocouple input modules. Because they let you use thermocouples with spare Modbus RS485 ports for temperature measurement.
Modbus RS485 thermocouple input
The D series is a versatile family of Modbus RS485 input modules, because a signal range is available for many sensor measurement applications, the supply voltage range is a wide 10 to 30Vdc (DIN rail units 5Vdc), as well as Modbus compatibility with a number of software options
When you have spare a spare RS485 port, and need to add temperature measurement, use D series thermocouple input modules. Because D series thermocouple input modules allow the simple measurement of industry standard thermocouples. They use the standard Modbus protocol. So you can easily connect your existing thermocouples to modern control systems. They are a simpler way to add thermocouple measurement to a RS485 bus than other types. Thermocouples are simpler to use than other temperature sensors. Because thermocouples are easy to install, they are useful in HVAC systems, refrigeration systems, chillers, environmental monitoring, computer room monitoring, dryer, and a variety of other applications.
When you need simple to use Modbus RS485 thermocouple input module, use the D series. In other words D series Modbus RS485 thermocouple input modules are a simple way to add thermocouple measurement to a RS485 bus.
D Thermocouple Inputs
Thermocouple types: J, K, T, E (factory set).
Ranges: J = -200°C to +760°C, K = -150°C to +1250°C, T = -200°C to +400°C, E = -100°C to +1000°C
Overall Accuracy (error from all sources) from 0 to +40°C ambient: ±1.0 °C .
Open thermocouple and over range indication.
Input burnout protection to 250Vac.
Automatic cold junction compensation and linearization.
Connectors: Screw terminal barrier plug (supplied).
Surface Mount: Screw threads: 6 X 32, spacing: 2.700″ (6.858 cm), with captive hardware.
Rail Mount: DIN 35mm
DIN-130 DIN rail mounted 1 thermocouple input modules include DIN-131, DIN-132, DIN-133, DIN-134
D1300M surface mounted 1 thermocouple input modules include D1312M, D1322M, D1332M, D1342M
D5300M surface mounted 4 thermocouple input modules include D5312M, D5322M, D5332M, D5342M