D8300 USB Thermocouple Input Module


The D8300 thermocouple input module contains seven isolated differential inputs for measuring thermocouple temperature sensors. Each thermocouple input can be configured to measure a different sensor type. The modules measure eight different thermocouple types including: J, K, T, E, R, S, B and C types.

The D8300 thermocouple input module performs a 16-bit analog to digital conversion on each thermocouple channel, linearizes the digital data and formats the result in a 16-bit unsigned integer format. The unsigned integer values represent a percentage of full-scale temperature range. See the Modbus scaling example link below.

The digital data values are transmitted to a host computer using the Modbus RTU serial protocol via the USB virtual serial port connection.

Download Datasheet

Download Manual

Modbus Scaling Overview

The D8300 USB thermocouple input modules can be mounted on a DIN-rail using the MK-1 mounting kit.

Available on backorder

Additional Information

Dimensions 7.14 × 4 × 1.5 in
Thermocouple Types

J, K, T, E, R, S, B, C


• User-selectable analog input range per channel.
• USB communications interface.
• Modbus RTU Protocol.
• 500Vrms analog input isolation.
• 16-bit analog input measurement resolution.
• Continuous self-calibration
• Programmable analog input digital filters.
• Requires +10V to +30Vdc unregulated supply, 1.4W.
• Removable screw terminal plug connectors.
• 3ft USB cable included.
• CE marked.


The D8300 thermocouple input modules are compatible with all commercial software programs and OPC servers that support the Modbus RTU protocol. Commercials software programs from DreamReport, Wonderware, Intellution, National Instruments Labview, Indusoft, DAQFactory and DASYLab all support the Modbus RTU protocol. OPC Servers from Kepware and MatrikonOPC support the Modbus RTU protocol.


• Process monitoring and control
• Data logging to any host computer
• Product testing

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