K-Type Thermocouple RS485 Temperature Transmitter Module

Product Definition and Introduction

The K-Type Thermocouple RS485 Temperature Transmitter Module from LOLEETTE is an industrial-grade device designed to measure and transmit temperature data using a K-type thermocouple. It converts thermocouple signals into standard output signals (4- 20mA,0- 5V, 0- 10V0V) for integration with control systems like PLCs, DCS, or display instruments. Key features include high-precision temperature measurement, RS485 Modbus RTU communication, and robust isolation for reliable performance in harsh industrial environments.

Main Features:

Supports K-type thermocouple input (0-1300°C range by default).
Outputs standard signal4- 20mA00- 5V0-5V0- 10V0-10V.
RS485 communication with Modbus RTU protocol for easy integration.
4-port isolation for enhanced signal stability and noise resistance.
Cold junction compensation for accurate temperature readings.
DIN rail mounting for easy installation in industrial setups.

Key Selling Points:

Versatile output options for compatibility with various control systems.
High reliability with isolated circuits and industrial-grade design.
Customizable input/output configurations to meet specific project needs.
Backed by LOLEETTE’s professional technical support and rigorous quality testing.

Instructions for Use

How to Use:

Power Supply Connection: Connect the module to a 24V DC power supply (default). Ensure proper polarity to avoid damage.
Thermocouple Connection: Attach a K-type thermocouple to the designated input terminals (positive and negative).
Output Configuration: Select the desired output si4- 20mA40- 5V, 0- 5V, or 0- 10V) via module settings or by contacting LOLEETTE for customization.
RS485 Communication Setup: Connect the RS485 terminals to a compatible device (e.g., PLC or computer). Configure the communication settings (default: 9600 baud rate, no parity, 8 data bits, 1 stop bit, device address 1).
Integration: Interface the module with a control room system, PLC, or DCS to receive temperature data. Use Modbus RTU protocol for data acquisition.
Mounting: Secure the module on a DIN rail for stable installation.

Applicable Usage Scenarios:

Industrial automation: Monitoring temperatures in manufacturing processes, HVAC systems, or chemical plants.
Data acquisition: Collecting temperature data for remote monitoring in energy or environmental systems.
Process control: Integrating with PLCs or DCS for real-time temperature regulation in metal processing or food production.

Precautions:

Verify the power supply voltage (24V DC default) to prevent damage.
Ensure proper thermocouple polarity to avoid inaccurate readings.
Avoid exposing the module to extreme humidity or corrosive environments.
Check the compatibility of output signals with your control system before installation.
For non-default configurations (e.g., other thermocouple types or temperature ranges), contact LOLEETTE before ordering.

Tips:

Use shielded cables for RS485 communication to minimize interference.
Regularly calibrate the module to maintain accuracy in long-term use.
Download the product manual from LOLEETTE’s website for detailed wiring diagrams and Modbus register maps.

Frequently Asked Questions (FAQ)

What is the temperature range of this module? The default range for the K-type thermocouple is 0-1300°C. Custom ranges can be configured by contacting LOLEETTE.
Can this module support other thermocouple types? Yes, it supports K, S, J, E, T, R, and N thermocouples, but you must specify the type when ordering.
What is the power supply requirement? The module requires a 24V DC power supply by default. Ensure a stable voltage to avoid performance issues.
How do I connect this to a PLC? Use the RS485 terminals to connect to the PLC’s Modbus RTU interface. Configure the PLC to match the module’s communication settings (e.g., 9600 baud rate, device address 1).
Is the module isolated? Yes, it features 4-port isolation to ensure signal stability and protect against electrical noise.
Can I use this for remote monitoring? Yes, the RS485 interface allows remote data acquisition when connected to a compatible system or computer with an RS-485-to-USB converter.
What is cold junction compensation? It corrects for temperature variations at the thermocouple connection point, ensuring accurate readings.

User Evaluation Summary

Pros (Based on General Feedback for Similar Products):

Reliable Performance: Users appreciate the module’s accuracy and stability in industrial environments.
Easy Integration: The RS485 Modbus RTU protocol is widely compatible with PLCs and control systems.
Versatile Outputs: Multiple output options (4- 20mA,0-5VV, 0- 10V) suit various applications.
Robust Design: Isolation and DIN rail mounting ensure durability in harsh conditions.
Responsive Support: LOLEETTE’s technical support is noted for addressing setup and customization queries promptly.

Cons (Based on General Feedback for Similar Products):

Complex Initial Setup: Some users report a learning curve for configuring RS485 communication and Modbus settings.
Limited Documentation: The provided manual may lack detailed troubleshooting steps for non-standard configurations.
Customization Delays: Orders requiring non-default settings (e.g., other thermocouple types) may face longer lead times.
No Built-In Display: Users must rely on external devices to view temperature data, which may be inconvenient for some applications.

Note: Specific user reviews for this exact LOLEETTE module were not available. The above is inferred from reviews of similar thermocouple transmitter modules on platforms like Amazon and industrial forums.

Competitive Product Comparison

Feature	LOLEETTE K-Type RS485 Module	Laurel Thermocouple Transmitter	Taidacent MAX6675 RS485 Module	ATO K-Type Thermocouple Transmitter
Thermocouple Types	K (default), J, E, T, R, S, N	J, K, T, E, N, R, S	K only	K (others configurable)
Temperature Range	0-1300°C (default, customizable)	Full thermocouple range	0-1024°C	0-1000°C
Output Signals	4-20mA, 0-5V, 0-10V	4-20mA, RS232, RS485	RS485 only	4-20mA
Communication	RS485 Modbus RTU	RS232, RS485, Modbus TCP (Ethernet)	RS485 Modbus RTU	None (analog only)
Isolation	4-port isolation	Isolated inputs	Double isolation	Silicone rubber seal
Power Supply	24V DC (default)	85-264V AC or 10-48V DC	5V DC	24V DC
Mounting	DIN rail	DIN rail	Board-level (no DIN rail)	Protection head with thermowell
Price (Approx.)	$30-$50 (estimated)	$200-$300 (MSRP)	$25-$40 (Amazon)	$50-$100 (ATO.com)
Unique Advantages	Customizable I/O, affordable	High accuracy (±0.2°C), Ethernet	Compact, low-cost	Built-in thermowell for rugged use

Analysis:

LOLEETTE: Offers a balance of affordability, versatility, and industrial-grade features. Ideal for users needing customizable outputs and RS485 integration.
Laurel: Premium option with superior accuracy and Ethernet support, but significantly more expensive.
Taidacent: Budget-friendly but limited to K-type and RS485-only output, lacking DIN rail mounting.
ATO: Rugged design with thermowell, but lacks RS485 communication, limiting remote monitoring capabilities.

Technical Specifications

Input: K-type thermocouple (default, 0-1300°C); supports J, E, T, R, S, N with customization.
Output Signals: 4- 20mA, 0-5V, or 0-10V (configurable).
Communication: RS485 with Modbus RTU protocol (default settings: 9600 baud, no parity, 8 data bits, 1 stop bit, device address 1).
Power Supply: 24V DC (default).
Isolation: 4-port isolation (1500V withstand voltage).
Accuracy: ±0.5% of full scale (typical for similar modules; exact accuracy not specified).
Resolution: 0.5°C (based on similar RS485 thermocouple modules).
Mounting: DIN rail, independent mounting with pluggable terminals.
Operating Temperature: -20°C to +70°C (typical for industrial modules; exact range not specified).
Dimensions: Not specified; typically compact (e.g., 100mm x 22.5mm x 120mm for similar DIN rail modules).
Weight: Not specified; typically 100-200g for similar modules.

Note: Some specs (e.g., exact dimensions, weight) were not provided on the LOLEETTE website. Inferred values are based on similar products.

Brand Story or Manufacturer Background

LOLEETTE is a dedicated e-commerce platform specializing in industrial PLCs and automation components. The company focuses on providing reliable, high-quality solutions for industrial applications, including temperature acquisition modules, analog input/output modules, and programmable controllers. LOLEETTE emphasizes rigorous product testing to ensure performance and durability, backed by a professional technical support team to assist with setup, customization, and troubleshooting. Their mission is to be a one-stop solution partner for industrial automation, catering to diverse industries such as manufacturing, energy, and process control.

Sources:

Product details: https://www.lollette.com/k-type-thermocouple-rs485-temperature-transmitter-module