Yokogawa CENTUM VP ATR8D-00 8-Channel Redundant Pressure Clamp Terminal Block

Product Overview

The ATR8S-00 (Part No. ATR8D-00) is a specialized signal conditioning and termination interface designed for Yokogawa’s CENTUM VP and CS 3000 Field Control Stations. Engineered specifically for high-availability temperature monitoring, this unit facilitates the integration of RTD and Thermocouple sensors into the AAR181 and similar I/O modules.

The primary engineering advantage of the ATR8D-00 lies in its redundant branching capability. It allows a single set of field sensors to be cross-connected to two separate I/O modules, ensuring that a single module failure does not result in the loss of critical process data. The M3.5 pressure clamp terminals are designed to maintain a gas-tight seal, which is vital for preventing oxidation of low-millivolt signals in corrosive chemical environments.

Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Identification: ATR8D-00

• I/O Capacity: 8 Differential Channels

• Redundancy Support: Dual-redundant module branching

• Terminal Interface: M3.5 Pressure Clamp (Spring-loaded contact)

• Dielectric Strength: 500 V AC (Terminals to Ground)

• Insulation Resistance: 10 MΩ minimum at 500 V DC

• Sensor Compatibility: Pt100, Pt50, JPt100 (RTD); Type K, J, T, E, B, R, S, N (TC)

• Cold Junction Compensation: Integrated reference sensors for Thermocouple precision

• Operating Ambient: 0°C to 60°C (32°F to 140°F)

• Relative Humidity: 5% to 95% RH (Non-condensing)

• Weight: 0.8 kg (1.76 lbs)

• Origin: Made in Japan

Operational Implementation

The ATR8D-00 (ATR8D-00) is typically deployed in mid-stream and downstream oil and gas applications where temperature excursions must be monitored with zero downtime. Unlike standard screw terminals that may loosen over time due to thermal cycling, the pressure clamp mechanism provides constant force, ensuring measurement stability for sensitive RTD resistance values.