Allen Bradley 1756-IT6I2 Enhanced Thermocouple Input Module
Allen Bradley 1756-IT6I2 Enhanced Thermocouple Input Module
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Brand:Allen Bradley PLC Item No.:Allen Bradley 1756-IT6I2 Product Origin:USA Product Dimensions:14.5 × 11.2 × 5.6 cm Product Weight:0.29 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen Bradley 1756-IT6I2 is an enhanced isolated thermocouple input module designed for ControlLogix systems requiring accurate, stable, and noise-resistant temperature measurement. Engineered for demanding industrial environments, this module delivers high-integrity thermal data acquisition across multiple process points while maintaining strong electrical isolation and measurement consistency.
With 6 individually isolated input channels plus cold junction compensation support, the 1756-IT6I2 is optimized for advanced process monitoring applications where precision directly impacts product quality, safety, and system efficiency. Although officially discontinued, it remains widely used in legacy ControlLogix installations and retrofit projects due to its proven performance and reliability in harsh environments.
Technical Specifications
Parameter
Specification
Manufacturer
Allen Bradley (Rockwell Automation)
Series
ControlLogix
Model Number
1756-IT6I2
Module Type
Enhanced Isolated Thermocouple Input
Input Channels
6 Isolated Thermocouple Inputs
Cold Junction Compensation
2 CJC Sensors
Supported Thermocouple Types
B, C, D, E, J, K, L, N, R, S, T
Input Signal Range
-12 mV to +78 mV (typical mV thermocouple range)
Resolution
16-bit processing (typical configuration)
Isolation
250V continuous channel isolation
Backplane Power
~4.6 W typical load
Power Dissipation
~4.6 W max
Thermal Dissipation
~15.7 BTU/hr
Channel Bandwidth
~15 Hz signal filtering
Settling Time
<80 ms (to 5% full scale)
Accuracy
±0.05% typical at 25°C
Calibration Interval
12 months
Operating Temperature
0°C to 60°C
Storage Temperature
-40°C to 85°C
Mounting
ControlLogix Chassis
Dimensions
14.5 × 11.2 × 5.6 cm
Weight
~0.29 kg
Wiring
Removable Terminal Block (RTB)
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Application Scenarios
The 1756-IT6I2 is designed for precision temperature monitoring in process-critical environments where stable thermal feedback is essential for operational safety and product consistency.
Typical applications include:
High-temperature furnace and kiln control
Chemical reaction process monitoring
Oil refining and petrochemical systems
Power generation and turbine systems
Pharmaceutical batch processing
Food production thermal control
Plastic extrusion and molding systems
Industrial HVAC and environmental control
Its combination of isolation, accuracy, and multi-channel capability makes it especially valuable in systems where even small temperature deviations can impact output quality or safety compliance.
Key Advantages
Proven High-Accuracy Measurement Performance
Delivers stable thermocouple signal conversion with strong resistance to industrial electrical noise.
Enhanced Signal Isolation
Individual channel isolation helps reduce cross-interference in dense control systems.
Multi-Sensor Capability
Supports a wide range of thermocouple types, enabling flexible deployment across diverse industrial processes.
Strong Legacy System Compatibility
Widely used in existing ControlLogix installations, making it a reliable choice for maintenance and system expansion.
Industrial Reliability Under Continuous Load
Designed for long operational cycles in high-temperature and high-noise environments.
Technical FAQs
1. What is the main function of the 1756-IT6I2?
It is used for high-precision thermocouple temperature measurement in ControlLogix PLC systems.
2. How many input channels does it support?
It provides 6 isolated thermocouple input channels.
3. Is the 1756-IT6I2 still in production?
No, it is discontinued but still widely used in existing industrial systems.
4. What thermocouple types are supported?
It supports types B, C, D, E, J, K, L, N, R, S, and T.
5. Why is isolation important in this module?
Isolation reduces noise and improves measurement stability in industrial environments.
6. What industries commonly use this module?
It is commonly used in energy, chemical, food processing, and heavy manufacturing industries.
7. What is the operating temperature range?
0°C to 60°C for operation, -40°C to 85°C for storage.
8. Does it support cold junction compensation?
Yes, it includes dual CJC sensor support for accurate thermocouple readings.
9. What is the typical weight of the module?
Approximately 0.29 kg.
10. Why is it still widely used despite discontinuation?
Because of its proven reliability, stable performance, and installed base in legacy ControlLogix systems.
