Mitsubishi Electric Q68TD-G-H01 MELSEC Q Series Temperature Input Module

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Manufacturer: Mitsubishi Electric
Product No.: Q68TD-G-H01
Country of origin:Съединени щати
Product Type: PLC Temperature Input Modules
Payment: T/T, Western Union
Weight: 1500g
Shipping port: Xiamen
Warranty: 12 months

Description

Configured for precise thermal monitoring, the Mitsubishi Electric Q68TD-G-H01 delivers eight channel-isolated thermocouple inputs to high-reliability MELSEC Q Series control environments. This high-performance module is designed to eliminate ground loops and reduce noise interference in multi-point temperature measurement applications, making it highly suitable for demanding industrial processing plants. Each channel can be configured independently, allowing for versatile sensor integration across different thermocouple types within a single PLC rack footprint.

Features

Channel-to-Channel Isolation: Complete galvanic isolation between input channels prevents ground loop electrical interference and protects sensitive control systems.
Multi-Type Thermocouple Support: Directly compatible with standard thermocouple types B, E, J, K, N, R, S, and T.
Compact System Footprint: Occupies only 16 I/O points on the MELSEC Q base unit, conserving valuable slot space.
Integrated Diagnostics: Offers sensor wire breakage and disconnection detection to trigger immediate system alerts and prevent thermal runaway.

Applications

Plastic extrusion, molding, and hot runner thermal profiling.
Heat treatment, kilns, and annealing industrial furnace control systems.
Multi-zone chemical reactor vessel temperature tracking.
Boiler feed-water and steam temperature monitoring in utilities.

Technical Specifications

Manufacturer	Mitsubishi Electric
Model Reference	Q68TD-G-H01
Series	MELSEC Q Series
Module Type	Temperature Input Module (Channel-Isolated)
Number of Inputs	8 channels
Input Sensor Types	Thermocouple (B, E, J, K, N, R, S, T)
Occupied I/O Points	16 points (allocated as intelligent function module)
Internal Current Consumption	0.49 A (at 5 VDC)
Module Width	27.4 mm
Module Height	98.0 mm
Module Depth	90.0 mm
Net Weight	0.18 kg
Shipping Weight (Calculated)	0.50 kg

Empirical Engineering Insights

Alternative Models & Compatibility

The Q68TD-G-H01 offers upgraded channel-to-channel isolation compared to non-isolated temperature modules such as the standard Q64TD. When replacing older non-isolated versions, review rack power budgets, as the internal 5 VDC current consumption is significantly higher (0.49 A) due to the onboard isolation circuitry. Ensure your system's power supply module (e.g., Q61P) has sufficient remaining overhead.

Application Pitfalls & Engineering Notes

To prevent measurement drift in environments subject to rapid ambient temperature fluctuations, avoid mounting the module directly adjacent to heat-producing components like power supplies or motor starters inside the enclosure. Ensure that unused input channels are software-disabled in the module parameters to prevent false sensor wire-breakage alarms and unnecessary CPU diagnostics.

Commissioning & Wiring Tips

Always use dedicated thermocouple extension and compensation cables matching the thermocouple type (e.g., KX extension wire for Type K sensors). Keep these sensor wires routed away from high-voltage AC cables and variable frequency drive outputs to minimize electromagnetic induction. Ensure shield wires are terminated at a single, clean instrumentation ground point near the PLC rack.

Installation Guidelines

CRITICAL WARNING: Disconnect all external power sources supplying the PLC system and any field-side wiring loops before inserting or removing the module. Performing installation tasks on an energized backplane risks destroying the sensitive internal isolation optocouplers and can cause unpredictable system operations.

Hook the bottom tab of the Q68TD-G-H01 module securely into the mounting slot of the MELSEC Q series base unit.

Pivot the module flush against the base plate and tighten the top securing screw to the specified torque rating to ensure solid ground plane contact.

Wire the thermocouple leads directly to the module terminals, maintaining strict attention to physical polarity indications (+ and - markings).

Configure the hardware configuration utility within your programming software (GX Works2 or GX Works3) to recognize the module and download parameter changes to the CPU.

Key Features:

#Melsec Q Series #PLC Temperature Input Modules

What types of thermocouples are compatible with the Q68TD-G-H01 module?

The module is compatible with standard thermocouple types B, E, J, K, N, R, S, and T. These can be configured independently per channel via system parameters.

Does this module feature built-in cold junction compensation?

Yes, the Q68TD-G-H01 includes cold junction compensation to ensure high accuracy over the specified operating temperature range of the PLC system.

How much physical backplane current does this module draw?

It has an internal current consumption of 0.49 A at 5 VDC. Ensure your system power supply module has sufficient capacity prior to integration.

What is the key benefit of the channel-to-channel isolation on this unit?

Channel-to-channel isolation prevents ground loops and electrical interference when different sensors are mounted on distinct grounded structures, ensuring reading stability.

Глобална експресна доставка

Стандартна доставка: 4-6 работни дни чрез DHL, FedEx и UPS.
Експресна изпращане: Изпращане в същия ден за налични поръчки, направени преди 14:00 ч. (GMT+8).
Глобално покритие: Обслужваме над 150 държави, включително бърза доставка до Саудитска Арабия и ОАЕ.

Връщания и гаранция

30-дневна гаранция: Връщания се приемат за налични продукти в оригинална, фабрично запечатана опаковка.
12-месечна гаранция: Всеки индустриален компонент е подкрепен с нашата професионална техническа гаранция.

Поръчките се обработват и доставят от понеделник до петък (с изключение на официалните празници).

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Mitsubishi Electric Q68TD-G-H01 MELSEC Q Series Temperature Input Module