STA4D-00 | Yokogawa | CENTUM VP Dual-Redundant Pressure Clamp Terminal Block

Product Overview

The Yokogawa STA4D-00 functions as a high-density, dual-redundant pressure clamp terminal block specifically engineered for the CENTUM VP Distributed Control System (DCS). This module provides a secure interface for 16-channel I/O signals, facilitating redundant wiring paths to ensure continuous process availability. It integrates robust surge protection to shield the system from field transients and electrical noise. We supply this unit as 100% Brand New and Original, providing factory-certified hardware for mission-critical control applications where signal failure is not an option.

Part Number Breakdown

The STA4D-00 utilizes Yokogawa's modular hardware code to define its terminal style and redundancy capability:

Technical Specifications

The STA4D-00 delivers high dielectric strength and electrical isolation within a compact footprint.

• Configuration: Dual-Redundant (Supports 16 Channels).

• Connection Type: Pressure Clamp with M4 screw terminal support.

• Surge Protection: Built-in surge absorber for every channel.

• Withstand Voltage: 500 V AC.

• Insulation Resistance: Minimum 100 MΩ (at 500 V DC).

• Dimensions: 65.6 mm x 72 mm x 52.3 mm.

• Weight: 0.3 kg.

• Condition: Guaranteed 100% Brand New and Original.

Engineering Advantages

The STA4D-00 resolves critical industrial wiring challenges through advanced hardware integration:

• Fail-Safe Redundancy: The dual-redundant configuration supports two separate I/O module connections for a single set of field signals. If one module fails or requires maintenance, the secondary path maintains the control loop, preventing costly process shutdowns.

• Integrated Surge Mitigation: The built-in surge absorbers eliminate the need for external, rail-mounted lightning protectors for each loop. This protects sensitive DCS cards from atmospheric surges and switching transients, significantly increasing the mean time between failures (MTBF) for the entire I/O nest.

• Vibration-Proof M4 Termination: The M4 screw terminal design provides superior mechanical clamping compared to standard spring-loaded blocks. This ensures stable electrical contact in high-vibration environments, such as near heavy rotating machinery, where loose wires often cause intermittent signal faults.

• Compact Space Optimization: Measuring only 72mm in its primary dimension, the STA4D-00 allows engineers to maximize cabinet density. This compact form factor reduces the size and cost of marshalling cabinets while providing 16 channels of redundant protection.

FAQs

• Can the STA4D-00 handle both analog and digital signals?

  Yes. The STA4D-00 functions as a physical termination interface compatible with various CENTUM VP I/O modules. However, you must verify the voltage and current ratings of your specific signal type against the terminal block's 500V insulation limits.

• How does the "Pressure Clamp" mechanism benefit field installation?

  The pressure clamp combines the security of a screw terminal with the ease of a surface-clamping connection. It distributes even pressure across the wire or ferrule, preventing wire damage and ensuring a gas-tight seal that resists oxidation in corrosive atmospheres.

• Is this module a direct replacement for older STA4D variants?

  The STA4D-00 represents the standard revision for current CENTUM VP installations. While it often maintains backward compatibility, we recommend reviewing your system configuration to ensure the mounting footprint and cable interfaces align with legacy racks.

• Is this a brand new original Yokogawa part?

  Absolutely. We supply only 100% Brand New hardware. Every STA4D-00 arrives in its original Yokogawa factory packaging with matching serial numbers and intact manufacturer seals, guaranteeing zero prior field use.