Product Overview
The Allen-Bradley 1756-IT16 is a high-density, non-isolated thermocouple/mV input module designed for the ControlLogix platform. It provides 16 channels for precise temperature measurement and millivolt signal acquisition, making it an essential component for demanding industrial automation applications. With 24-bit resolution and support for multiple thermocouple types, the 1756-IT16 delivers accurate and reliable data for your control system.
Technical Specifications
Below are the key specifications for the Allen-Bradley 1756-IT16, sourced directly from the manufacturer's data:
| Parameter |
Value |
| Brand |
Allen-Bradley / Rockwell Automation |
| Series |
ControlLogix |
| Part Number |
1756-IT16 |
| Module Type |
Analog input, thermocouple mode |
| Number of Channels |
16, non-isolated |
| Data Resolution |
24-bit |
| Enclosure Type |
None (Open-style) |
| Mounting |
Chassis |
| Display |
Status LED |
| Input/Output Range |
-100 to 100 millivolts, max. 5 Volt-Amps |
| Isolation Voltage |
250 Volts (continuous) |
| Current Draw at 5.1 VDC |
200 milliamps |
| Current Draw at 24 VDC |
80 milliamps |
| Operating Temperature |
0 to 60 °C (32 to 140 °F) |
Key Features & Benefits
-
High-Density 16-Channel Design: Maximize I/O capacity while saving chassis space.
-
24-Bit Resolution: Ensures precise measurement for critical temperature loops.
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Wide Thermocouple Support: Compatible with B, C, E, J, K, N, R, S, and T types, plus millivolt inputs.
-
Cold Junction Compensation: Built-in compensation ensures accurate readings across ambient temperature changes.
-
Status LED: Provides immediate visual feedback on module health.
-
Open-Style Enclosure: Designed for chassis mounting in control cabinets.
Industry Applications
The Allen-Bradley 1756-IT16 is ideal for industries requiring accurate temperature monitoring and control, such as:
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Process Manufacturing: Monitor reactor temperatures, heat exchangers, and distillation columns.
-
Food & Beverage: Ensure precise temperature control in pasteurization, baking, and sterilization processes.
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Metal & Glass Processing: Measure furnace and kiln temperatures with high accuracy.
Its 16-channel density and thermocouple flexibility make it a versatile choice for both new installations and system expansions.
Installation & Setup Guidance
Mount the 1756-IT16 directly into a ControlLogix chassis. Ensure the module is properly keyed to prevent incorrect insertion. Connect thermocouple wires to the module's terminal blocks, observing correct polarity. For thermocouple mode, two CJC sensors (Allen-Bradley 1756-CJC) are required; note that these are not included and must be purchased separately. After installation, configure the module using RSLogix 5000 or Studio 5000, selecting the appropriate thermocouple type and input range.
Maintenance & Reliability
This module is designed for long-term reliability in industrial environments. Regularly inspect the chassis connections and ensure the module is seated firmly. Keep the surrounding area free of excessive dust and moisture to maintain optimal performance. The operating temperature range of 0 to 60 °C should be respected to prevent thermal stress. With proper care, the 1756-IT16 provides years of dependable service.
Compatibility & Integration
The 1756-IT16 is part of the ControlLogix 1756 family and integrates seamlessly with Allen-Bradley ControlLogix controllers. It is compatible with standard ControlLogix chassis and communicates via the backplane. No additional communication modules are required for local I/O operation.
Selection Guide & Purchasing Advice
Before purchasing, verify your ControlLogix chassis has an available slot and that your controller firmware supports the 1756-IT16. Confirm the required thermocouple types and whether you need the optional CJC sensors (1756-CJC). For a reliable source of genuine Allen-Bradley parts, consider PLC Source PRO for competitive pricing and fast delivery.