TST320 is a module with MODBUS RTU interface and 2 inputs for thermocouples. Crafted for a range of industrial applications, it provides precise temperature readings across a variety of thermocouple types, making it an ideal solution for temperature measurements in industrial processes. The module’s unparalleled compatibility supports all thermocouples – J, K, T, N, E, B, R, and S – ensuring seamless integration into any setup. Its 24-bit ADC with DSP processing and ±0.1% accuracy provide exceptional measurement precision. Combined with ±0.19% CJC accuracy, your readings remain reliably precise. With an RS-485 interface supporting up to 63 nodes, communication with existing systems is effortless using Modbus RTU protocol. Designed for easy installation, it includes an integrated 120-ohm termination resistor for optimized signal integrity, simplifying setup. Safety is a top priority with a remarkable working isolation voltage of 1500Vrms, ensuring secure operation in industrial environments. TST320 2-channel thermocouple module enables engineers, technicians, and decision-makers to obtain real-time temperature data, enhancing process efficiency, product quality, and system reliability.

Features:

• 24-bit ADC with DSP processing
• RS-485 interface supporting up to 63 nodes
• LED indicator displaying communication status
• Compatibility with all types of thermocouples
• Integrated 120-ohm termination resistor
• Firmware update capability via the interface

2-channel thermocouple module applications:

• Industrial temperature monitoring
• HVAC system control
• Laboratory and research applications
• Food and beverage industry
• Building management systems
• Automotive industry

Warranties - Returns:
Money Return:	Repair - Replacement:
20 days	36 months

Specifications
Physical characteristics
Dimensions	35 x 86 x 59 mm (2 module enclosure)
Weight	75g
Mounting	On 35 mm DIN top-hat rail
Environmental limits
Operating temperature range	-20 to 60°C
Operating relative humidity range	10 to 90% (non-condensing)
Storage temperature range	-25 to 65°C
Storage relative humidity range	5 to 95% (non-condensing)
Ingress protection	IP40 (connections IP20)
Power supply
Operating voltage range (including -15/+20% according to IEC 62368-1)	5 to 30VDC
Current consumption	15mA@12V
Thermocouples
Thermocouple types supported	J, K, T, N, E, B, R, and S
Temperature resolution	0.01°
ADC conversation accuracy max)	±0.1%
CJC accuracy (max)	±0.19%
Input conversion rate for both channels	1 sample per second With DSP (Digital Signal Processing) over 76865 samples for low-pass filtering and 50/60Hz notch filtering
Thermocouple break detection	Available
Interface
Protocol	Modbus RTU
Physical layer	RS-485 serial line
Number of bus transceivers	up to 63
Bus cable	Twisted, shielded, 2×0.5mm²
Response time	≤50ms Master response time-out ≥ Response time + Answer time The answer time depends on the number of bits and the baud rate.
Connectors
Type	3.81mm pitch screwless pluggable for 28 to 16 (AWG) / 0.081 to 1.31 (mm²) wires
Ιsolation
Maximum working isolation voltage	1500Vrms