S9879UK Yokogawa 1500V AC Dielectric Strength Connector

Product Overview

The Yokogawa S9879UK functions as a high-performance analog input connector unit specifically engineered for the CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). This 100% Brand New original unit provides the critical physical interface between field-side analog instrumentation and the system I/O modules. By utilizing a modular design, the S9879UK streamlines field wiring processes and facilitates rapid module replacement without disturbing permanent terminal connections. Its ruggedized construction ensures stable low-millivolt signal transmission in heavy industrial environments where electrical noise and vibration are constant factors.

Technical Specifications

Engineering Advantages

• High-Integrity Signal Transmission: The S9879UK utilizes tin-plated pin connectors and metal spring contacts to maintain a contact resistance of ≤ 5 mΩ. This low resistance prevents signal attenuation and ensures that high-precision analog data reaches the DCS without loss of accuracy.

• Robust Dielectric Protection: With a dielectric strength rated at 1,500 V AC, the unit effectively isolates sensitive logic-side electronics from high-voltage field-side surges. This protective barrier minimizes the risk of backplane damage during atmospheric electrical events or industrial switching transients.

• Advanced Material Safety: Yokogawa manufactures the connector housing from UL94 V-0 rated flame-retardant plastic. This material choice prevents the spread of fire in control cabinets and ensures mechanical stability even when exposed to localized thermal stress.

• Streamlined Maintenance Workflow: The modular connector design allows technicians to disconnect analog input modules in seconds. Because the S9879UK handles the field wiring termination, you can replace active electronic components without re-wiring individual loops, drastically reducing Mean Time to Repair (MTTR).

• Industrial Environment Resilience: The unit features a high-density mechanical fit that resists dust ingress and maintains electrical continuity under constant industrial vibration. Its compact 50 mm width optimizes rail space in densely packed CENTUM terminal cabinets.

FAQs

• Q: Does the S9879UK support high-current analog loops?

• A: Yes. The unit supports up to 5 A per channel, providing significant overhead for standard 4-20 mA loops as well as more demanding industrial signaling applications.

• Q: Can I use this connector unit with non-Yokogawa modules?

• A: The S9879UK is specifically designed for the proprietary pin configurations of the Yokogawa CENTUM VP and CS 3000 series analog input modules. We recommend using it exclusively with compatible Yokogawa hardware to ensure signal integrity.

• Q: How does the "spring contact" mechanism benefit my installation?

• A: The metal spring contacts provide constant pressure against the mating pins. This ensures a gas-tight seal that prevents oxidation and maintains a stable connection even if the control cabinet is subject to motor-induced vibrations.

• Q: Is the unit compatible with older CENTUM CS 1000 systems?

• A: While the S9879UK primarily serves the VP and CS 3000 platforms, you should verify the specific I/O module part number in your CS 1000 system documentation. Most modern Yokogawa analog connectors maintain a high degree of backward compatibility within the CENTUM family.