Product Description

The ATR8D-00 (Model: ATR8D) is a high-integrity, dual-redundant pressure clamp terminal block specifically engineered for Yokogawa’s CENTUM VP and CS 3000 Field I/O (FIO) subsystems. It serves as the dedicated physical interface for 8-channel temperature input modules, such as the AAR181 RTD/TC module. The ATR8D-00 (Order Number: ATR8D-00) facilitates secure, gas-tight connections for Resistance Temperature Detectors (RTD) and Thermocouples (TC), ensuring precision signal integrity in high-vibration industrial environments.

By employing a dual-redundant architecture, the ATR8D-00 allows eight temperature signal points to be branched to two separate I/O modules simultaneously. This configuration effectively eliminates single points of failure at the termination level, providing the reliability required for safety-critical monitoring. The M3.5 pressure clamp design offers superior contact reliability over traditional screw terminals, significantly reducing long-term maintenance requirements in demanding sectors like petrochemical refining and power generation.

Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Number: ATR8D-00

• Product Type: Dual Pressure Clamp Terminal Block

• Channel Count: 8 Channels (Dual-Redundant support)

• System Compatibility: CENTUM VP / CS 3000 FIO Subsystem

• Connection Interface: M3.5 Pressure Clamp Terminals

• Supported Sensors: RTD (Pt100, Pt50, etc.), Thermocouple (K, J, T, E, etc.)

• Withstanding Voltage: 500 V AC between terminals and ground

• Insulation Resistance: ≥ 10 MΩ (at 500 V DC)

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -40°C to +85°C

• Net Weight: 0.8 kg

• Country of Origin: Japan

Functional Features

• Redundant Signal Branching: Directs field sensor data to redundant I/O module pairs, ensuring continuous process visibility even during a module failure.

• Vibration Resistance: Pressure clamp technology maintains constant tension on wire leads, preventing signal drift or intermittent connectivity caused by mechanical stress.

• Gas-Tight Connectivity: Protects sensitive low-voltage temperature signals from oxidation and atmospheric corrosion in chemical plant environments.

• High-Accuracy Cold Junction Compensation: When used with thermocouples, the block design supports stable temperature references essential for high-precision measurement.

Application Scenarios

• Chemical Reactors: Monitoring critical temperature profiles where sensor failure would lead to unsafe process conditions.

• Refining Distillation Columns: Managing high-density RTD/TC inputs for thermal efficiency tracking.

• Nuclear and Thermal Power: Providing high-integrity termination for safety-instrumented systems and turbine monitoring.