KEBA TM240/A (KeConnect I/O Multi-channel Thermocouple Temperature Measurement Module) I. Product Overview
KEBA TM240/A (KeConnect I/O Multi-channel Thermocouple Temperature Measurement Module) I. Product Overview
The KEBA TM240/A is a high-precision multi-channel thermocouple temperature measurement module under the Kemro K2 platform of the KeConnect I/O system of Austria's KEBA (Kemba). It is specifically designed for injection molding, die-casting, machine tools, industrial furnaces, heat treatment, and precision automation equipment, and is used for multi-point temperature collection, monitoring, and closed-loop control. The module is seamlessly connected to the C5/C1 series controllers via the dedicated K-bus backplane bus of KEBA, enabling high-speed, precise, and isolated temperature measurement of key parts such as molds, barrel, hot runner, heating rollers, and furnace chambers. It is the core expansion unit for industrial temperature control scenarios.
II. Core Positioning and Naming Explanation
Official Model: TM240/A (Temperature Module 240/A);
Series: Kemro K2-200/K2-400 Platform (KeConnect I/O);
Product Positioning: Specialized thermocouple temperature measurement module, distinct from general analog input modules, focusing on high-temperature, multi-channel, high-precision, and strong-isolation temperature acquisition scenarios, compatible with mainstream thermocouples such as J/K/L types.
III. Core Functions
6 independent thermocouple inputs, multi-channel parallel acquisition
Equipped with 6 completely independent thermocouple input channels, each channel can be individually configured with the type of thermocouple, supporting simultaneous monitoring of 6 different temperature measurement points, meeting the requirements of complex equipment for multi-point temperature control (such as multi-stage heating of the injection machine barrel, multi-point temperature measurement of molds).
Wide type compatibility, compatible with mainstream thermocouples
Supports J-type (iron-conductive copper), K-type (nickel-chromium-nickel-silicon), L-type (German standard) and other common thermocouples, covering a wide temperature measurement range of -200℃ to +1300℃, suitable for industrial scenarios from low temperature to high temperature.
High-precision measurement, low drift, high stability
Uses 14-bit high-precision ADC (analog-to-digital converter), typical measurement accuracy ±0.5℃, maximum error ≤±1℃; built-in cold junction compensation (CJC) circuit, automatically corrects environmental temperature drift, ensuring stable measurement under room temperature fluctuations, meeting precise temperature control process requirements.
Enhanced electrical isolation, strong anti-interference ability
Each channel is electrically isolated from the system side and between channels with a 2500V AC high voltage, effectively blocking industrial interference such as inverter harmonics, heater start-stop impact, and grid fluctuations, avoiding temperature drift or false alarms, protecting the main control system safety.
K-bus backplane bus, plug-and-play
Uses KEBA's dedicated K-bus high-speed backplane bus connection, automatically identifies, automatically configures, supports hot swapping, during operation, modules can be directly replaced without stopping or power-off, shortening maintenance time, improving system availability.
Complete diagnosis and status indication
Each channel is equipped with an independent **FAULT (fault, red) LED indicator, combined with the power indicator light (green), can intuitively determine fault states such as power supply, channel break, thermocouple connection reverse, short circuit, over-range, etc., quickly locate the problem, reducing troubleshooting difficulty.
Industrial-grade wide temperature and reliable design
Uses reinforced PCB, industrial-grade components, and fully sealed dust-proof structure, operating temperature 0℃ to +55℃, suitable for high-temperature, high-humidity, and high-dust workshop environments, supporting 24-hour continuous stable operation.
IV. Technical Parameters (Official Standard Specifications)
Model: TM240/A
Series: Kemro K2-200/K2-400 (KeConnect I/O)
Input channels: 6 independent thermocouple inputs (each channel can be individually configured with type)
Supported thermocouple types: J-type, K-type, L-type (can be selected by software)
Temperature measurement range:
J-type: -200℃ to +750℃;
K-type: -200℃ to +1300℃;
L-type: -200℃ to +900℃.
Resolution: 14 bits (0.1℃ level accuracy)
Measurement accuracy: typical ±0.5℃, maximum ±1℃ (25℃ environment)
Cold junction compensation: built-in CJC circuit, automatically compensates for environmental temperature (0℃ to +55℃)
Electrical isolation: channel ↔ system, channel ↔ channel, isolation voltage 2500V AC
Sampling rate: each channel 10Hz (high-speed acquisition, real-time response to temperature changes)
Input impedance: ≥1MΩ (suitable for low-signal thermocouples, reducing load error) Fault detection: Supports diagnosis of open circuit, short circuit, reversed polarity, and over-range
Power supply: 24V DC (supplied by the K-bus backplane bus, no external power required)
Power consumption: ≤ 2.8W
Address configuration: 16-bit DIP address switch on the side (sets K-bus communication address to avoid conflicts)
Status indication: Green (power, always on for normal operation), red (each channel FAULT, fault always on)
Operating temperature: 0℃～+55℃
Storage temperature: -40℃～+70℃
Humidity requirement: 10%～95% (no condensation)
Protection level: IP20 (front of the module, dust-proof and electric-proof)
Size (width × height × depth): 22.5mm × 120mm × 100mm (including K-bus plug)
Weight: Approximately 135g
Terminal: 5.08mm spacing open-gold terminals, reliable contact and anti-corrosion
Certifications: CE (EMC/LVD), RoHS, UL 508, EN 61131-2 (industrial control standard)
V. Mechanical and Environmental Characteristics
Compact standardized design
Uses KeConnect I/O modules of unified size (22.5×120×100mm), fully compatible with SM210/A, SM250/A, SI101, etc. Modules are neatly arranged in the cabinet, saving installation space; lightweight (135g), suitable for high-density I/O expansion scenarios.
Reinforced dust-proof structure
PCB board reinforced treatment, component sealed protection, front IP20 protection level, can prevent dust and foreign objects from invading, suitable for long-term operation in harsh industrial environments.
Wide temperature stable operation
Working temperature covers 0℃～+55℃, meeting requirements for injection molding machine barrel heating, industrial furnace high-temperature environment, etc.; storage temperature -40℃～+70℃, facilitating transportation and storage.
VI. Wiring Specifications
Thermocouple wiring basics
Use dedicated thermocouple compensation wires (corresponding models: J/K/L type), avoiding measurement errors introduced by ordinary wires;
Thermocouple positive and negative poles must correspond: J type (red +, black -), K type (red +, yellow -), L type (red +, blue -);
Wire length ≤ 50 meters, if longer, select thickened wire diameter compensation wires to reduce signal attenuation.
Single-channel wiring steps
Module CHx+ ↔ Thermocouple positive pole (compensation wire positive pole);
Module CHx- ↔ Thermocouple negative pole (compensation wire negative pole);
Module GND ↔ System ground (single-ended grounding, reducing common-mode interference).
Key points of anti-interference wiring
Compensation wires are laid separately, away from frequency converters, motors, and high-power power lines (distance ≥ 30cm);
The shield layer of the compensation wire is single-ended grounded (on the module side), avoiding loop interference when both ends are grounded;
When wiring multiple channels, separate the wires between channels to avoid cross-interference.
VII. Typical Application Scenarios
Injection molding machine multi-stage temperature control
Connect the barrel (3–4 stages), mold, hot runner thermocouples to achieve precise temperature control for barrel section heating (±1℃), mold temperature monitoring, and constant temperature control for hot runner, ensuring injection molding quality and reducing scrap rate.
Die and molten material temperature measurement for die-casting machines
Monitor the cavity temperature of the die-casting mold and the temperature of the molten material furnace, achieve closed-loop temperature control during the preheating, insulation, and cooling processes of the mold, improving die-casting part accuracy and consistency, and extending mold life.
Industrial furnaces / heat treatment equipment
Connect the furnace cavity, heating zone, and workpiece thermocouples to achieve multi-point monitoring of furnace temperature, precise control of heating / insulation / cooling processes, and over-temperature alarm, suitable for metal quenching, tempering, ceramic sintering, etc. high-temperature processes.
Machine tools and hot forming equipment Monitor the temperatures of the machine tool spindle, heating rollers, and forming molds, achieve thermal deformation compensation, temperature anomaly warning, and stable control of process parameters, thereby improving processing accuracy and equipment stability.
Food / Pharmaceutical / Chemical temperature control scenarios
Adapt to temperature measurement requirements ranging from low temperature (-200℃) to medium temperature (+600℃), realize temperature monitoring for reaction vessels, fermentation tanks, and drying ovens, meeting the industry's high-precision and high-reliability temperature control requirements.
VIII. Installation and Commissioning Key Points Installation steps
During power outage, align the module with the K2 series backplane slot and push it in smoothly. The latch will lock it in place.
Set the unique K-bus address through the 16-bit address switch on the side to avoid conflicts with other modules.
After powering on, the controller will automatically recognize the module. Configure it in the programming software: enable/disable channels, thermocouple type (J/K/L), measurement range, and fault alarm threshold.
Support hot swapping. After replacing the module during operation, the system will automatically re-identify it without the need for a restart.
Debugging precautions
Before wiring, confirm that the thermocouple model matches the compensation cable. Do not mix them (e.g., K-type thermocouple with J-type cable).
Do not reverse the positive and negative terminals of the thermocouple. Otherwise, the measurement value will be negative or drift.
For the first debugging, power on without load to check the status of the FAULT lights on each channel. If there are no abnormalities, connect the thermocouple.
If the measurement value drifts, first check the shielding grounding and wiring interference of the compensation cable, and then calibrate the cold end compensation.
The alarm threshold for over-temperature/low-temperature is set according to the process to avoid false alarms or safety risks.
IX. Comparison with similar modules
TM240/A: 6-channel thermocouple dedicated, 2500V isolation, 14-bit accuracy, cold end compensation, suitable for high-temperature multi-point temperature measurement;
General analog input module (such as AI230/A): 4–8 channels of voltage/current input, no cold end compensation, 12-bit accuracy, requires external signal conditioning, suitable for standard analog signals;
SM210/A (SI485/422): Pure serial communication module, no temperature measurement function, suitable for serial device data interaction.
X. Fault Troubleshooting Guide
Green power LED does not light up, module not recognized
Check if the K-bus backplane bus is securely plugged in and the 24V DC power supply is normal;
Confirm that the side address switch is set correctly and there is no address conflict;
Check if the slot is damaged and replace it for testing;
Check if the environmental temperature is outside the range of 0℃ to +55℃. Power off and cool down before retrying.
Single-channel red FAULT LED is constantly on
Open circuit: Check if the thermocouple or compensation cable is broken, or if the terminals are loose;
Short circuit: Check if the positive and negative terminals of the thermocouple are short-circuited, or if the insulation layer of the cable is damaged;
Polarity reversed: Swap the positive and negative terminals of the thermocouple and retest;
Over-range: Confirm that the measured temperature value exceeds the module range, and replace with a compatible type of thermocouple;
Sensor damage: Replace the new thermocouple and verify if the channel is normal.
Measurement value drift / inaccurate
Check if the compensation cable is mixed, if the length is too long or the wire diameter is too thin;
Confirm that the shielded layer is single-ended grounded, and the wiring is away from strong interference sources;
Calibrate the cold end compensation parameters and update the module firmware;
Check if the environmental temperature fluctuates too much and improve ventilation and cooling.