Turck BL20-2AI-THERMO-PI Programmable Logic Controller Module

Description:

The Turck BL20-2AI-THERMO-PI analog input module is used in BL20 distributed I/O and industrial temperature monitoring systems. Commonly installed in process automation skids, ovens, furnaces, packaging equipment, food processing machinery, and manufacturing systems requiring direct thermocouple temperature measurement. Maintenance teams, OEMs, and system integrators use this part for I/O expansion, temperature monitoring upgrades, control system retrofits, and replacement of analog input modules.

Applications:

The Turck BL20-2AI-THERMO-PI provides two analog input channels for direct connection of thermocouple temperature sensors within the BL20 modular I/O platform. The module is commonly used in heat treatment equipment, industrial ovens, plastic processing machinery, food and beverage production lines, environmental chambers, and process heating applications where accurate temperature acquisition and monitoring are critical. The fieldbus-independent BL20 architecture allows seamless integration into Ethernet/IP, PROFIBUS, PROFINET, and other industrial communication networks while reducing wiring complexity and simplifying system expansion.

Technical Specifications:

• Brand: Turck
• Part Number: BL20-2AI-THERMO-PI
• Manufacturer Part Number (MPN): 6827020
• Product Type: Analog Thermocouple Input Module
• Series: BL20 I/O System
• Function: Thermocouple temperature signal acquisition
• Number of Channels: 2 analog inputs
• Input Type: Thermocouple inputs
• Supported Thermocouples: Type B, E, J, K, N, R, S, and T
• Signal Type: Analog input, temperature
• Supply Voltage: 24 VDC via BL20 backplane bus
• Nominal Current from Field Supply: ≤30 mA
• Nominal Current from Module Bus: ≤45 mA
• Typical Power Dissipation: ≤1 W
• Resolution: 16-bit
• Maximum Analog Frequency: 2 Hz
• Cycle Time: ≤300 ms
• Accuracy: <0.2% at 23°C
• Repeatability: 0.05%
• Electrical Isolation: Galvanically isolated from field level via optocouplers
• Cold Junction Compensation: Internal compensation through compatible base module
• Connection Technology: Screw terminal or cage clamp terminal via base module
• Mounting Type: Plug-in module for BL20 base system
• Protection Rating: IP20
• Operating Temperature: 0°C to +55°C
• Storage Temperature: -25°C to +85°C
• Dimensions: 12.6 x 74.1 x 55.4 mm
• Approvals: CE, cULus, Class I Division 2, Zone 2
• Application: Industrial temperature monitoring and process control systems
• Special Features: Fieldbus independent operation, status LEDs, diagnostic LEDs, hot-swappable modular design.

Common Replacements:

• Turck BL20-2AI-PT/NI-2/3
• Turck BL20-E-4AI-TC
• Turck BL67-4AI-TC