YOKOGAWA AAT145-S50 TC/mV Input Module

Description

YOKOGAWA AAT145-S50 TC/mV Input Module

Product Dimensions：

The Yokogawa AAT145-S50 is a TC/mV Input Module (Thermocouple and millivolt input) designed for Yokogawa’s CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). It belongs to the N-IO (Network I/O) / FIO (Field Enclosure I/O) family, offering high accuracy for process temperature monitoring.

Product Detailed Description

The AAT145-S50 module acts as a temperature and low-voltage analog signal acquisition card. It interfaces directly with standard industrial thermocouples (TC) or low-voltage millivolt (mV) field instruments, converting these micro-level signals into digital process values for the central control unit.

The “-S50” suffix indicates a specific standard functional specification (Single/Standard module version with conformal coating option depending on exact sub-suffix).

Technical Parameters

Product Advantages

• High Channel Density: Provides 16 isolated channels in a single compact module, saving rack space and reducing per-point hardware costs.
• Flexible Input Selection: Each channel can be software-configured independently for different thermocouple types or mV ranges without needing physical jumper adjustments.
• Channel-to-Channel Isolation: High galvanic isolation prevents ground loops and electrical interference from spreading between different field instruments.
• Cold Junction Compensation (CJC): Highly accurate CJC handling ensures precise temperature readings even under changing ambient panel temperatures.

Important Considerations & Precautions

• Terminal Block Compatibility: Requires the correct pressure clamp or screw terminal block equipped with built-in Cold Junction Compensation sensors (e.g., AATM1T or matching terminal modules).
• Thermocouple Extension Wires: Ensure proper thermocouple extension or compensating cables are used up to the terminal block. Intermixing standard copper wire will introduce severe CJC measurement errors.
• Hot-Swapping Rules: While the module supports online replacement in redundant configurations, ensure the DCS maintenance procedures are followed to prevent alarm chattering or system interruptions.
• Shielding & Grounding: Thermocouple signals are small (millivolts) and susceptible to electromagnetic noise. Shielded cables grounded at a single point are strictly required.

Product Applications

The Yokogawa AAT145-S50 is deployed extensively in process industries where precise temperature monitoring is essential:

• Refineries & Petrochemical: Monitoring reactor bed temperatures, distillation column temperature profiles, and furnace tubes.
• Power Plants: Boiler tube wall temperature measurements and steam turbine monitoring.
• Chemical Plants: Batch reactor temperature tracking and exothermic reaction safety loops.
• Metallurgy & Kilns: High-temperature furnace and oven monitoring using noble-metal thermocouples (R, S, B types).

Shipping Port: Xiamen, China

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