YOKOGAWA SAT145 Modules: SAT145-S65

Technical Dossier

Product Details And Specifications

YOKOGAWA SAT145 Series: Comprehensive Module Range and Technical Overview

The YOKOGAWA SAT145 series represents a core analog input subsystem within the CENTUM CS/CS3000 Distributed Control System (DCS) platform. Deployed extensively across global heavy industries — including petrochemical complexes, nuclear power facilities, LNG terminals, and crude oil refineries — the SAT145 range provides high-density thermocouple and RTD signal conditioning with direct backplane integration into the CENTUM field control station (FCS) architecture. Its installed base spans facilities in the Middle East, Southeast Asia, Europe, and North America, where long-term operational continuity requirements of 20–30 years make spare parts availability a critical procurement concern.

The Evolution of SAT145 Architecture

The SAT145 series was introduced as part of YOKOGAWA's CENTUM CS platform in the mid-1990s, designed to replace discrete signal conditioning hardware with integrated, bus-coupled I/O modules. Early variants supported basic thermocouple types (K, J, T) with 8-channel density. As the CENTUM CS3000 platform matured through the 2000s, the SAT145 line expanded to include multi-range RTD inputs, higher channel counts, and enhanced noise rejection for electrically harsh environments.

The transition from CENTUM CS to CENTUM VP (introduced circa 2008) introduced the AAT141 and AAT145 series as functional successors, offering improved diagnostics, HART pass-through capability, and higher channel density. However, the SAT145 series remained in active production support through the 2010s due to the large installed base of CS3000 systems. As of 2026, the SAT145 series is in the mature/end-of-life phase. YOKOGAWA no longer manufactures new units for most sub-models; procurement is dependent on certified refurbished stock, new-old-stock (NOS), and third-party MRO suppliers. Long-term maintenance support for SAT145-equipped systems requires a proactive spare parts strategy.

SAT145 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified SAT145 series module range. Each entry reflects a distinct hardware configuration within the CENTUM CS/CS3000 I/O subsystem.

SAT145-S65: 8-ch thermocouple/mV input module, CENTUM CS3000 FCS backplane mount
SAT145-S05: 8-ch thermocouple input, standard range, low-density FCS slot
SAT145-S10: 8-ch thermocouple input, extended type coverage (K/J/T/E/R/S/B)
SAT145-S15: 8-ch RTD input module, Pt100/Pt1000, 3-wire configuration
SAT145-S20: 8-ch RTD input, 4-wire Pt100, high-accuracy variant
SAT145-S25: 8-ch mV/thermocouple input, isolated channel architecture
SAT145-S30: 16-ch thermocouple input, high-density FCS slot, multiplexed ADC
SAT145-S35: 16-ch RTD input, high-density, Pt100 3-wire
SAT145-S40: 8-ch thermocouple input with cold junction compensation, field-mount variant
SAT145-S45: 8-ch thermocouple input, intrinsically safe barrier-compatible
SAT145-S50: 8-ch thermocouple/RTD universal input, software-selectable range
SAT145-S55: 8-ch thermocouple input, CE-marked, IEC 61508 SIL2 rated
SAT145-S60: 8-ch RTD input, SIL2 rated, redundant signal path
SAT145-S70: 16-ch thermocouple input, high-speed scan, process historian integration
SAT145-S75: 16-ch RTD/thermocouple universal, high-density, CENTUM CS3000 R3 compatible
SAT145-S80: 8-ch thermocouple input, ATEX Zone 2 certified, hazardous area deployment
SAT145-S85: 8-ch RTD input, ATEX Zone 2, 3-wire Pt100, hazardous area variant

Sourcing Hard-to-Find & Obsolete SAT145 Parts

DriveKNMS maintains a dedicated inventory program for end-of-life YOKOGAWA CENTUM modules, including the full SAT145 range. As YOKOGAWA has transitioned its active product line to the CENTUM VP platform, procurement of SAT145 modules through standard distribution channels has become unreliable. DriveKNMS sources SAT145 units through decommissioned plant buybacks, certified refurbishment pipelines, and verified new-old-stock holdings.

All SAT145 units supplied by DriveKNMS are accompanied by functional test documentation, traceability records, and a minimum 12-month warranty against hardware failure. For customers operating CENTUM CS3000 systems with a defined decommission horizon of 5–15 years, DriveKNMS offers blanket order agreements to reserve allocated stock against future maintenance requirements. This eliminates unplanned downtime risk caused by spot-market unavailability of critical I/O modules.

Quality Control for the SAT145 Range

The SAT145 series employs a proprietary YOKOGAWA backplane bus protocol for communication with the FCS processor. Standard bench testing is insufficient to validate module integrity; DriveKNMS utilizes a CENTUM CS3000 live test rack environment to perform end-to-end functional verification of each SAT145 unit prior to shipment.

The test protocol covers: cold junction compensation accuracy (±0.5°C tolerance), full-range linearity sweep across all supported thermocouple and RTD types, backplane bus communication handshake verification, channel isolation resistance measurement (>100MΩ), and burn-out detection circuit validation. Modules exhibiting any parameter deviation outside YOKOGAWA factory specification are quarantined and not released for sale. Test reports are available upon request for all shipped units.