Yokogawa ATR Series Modules: ATR8S-00 S2

Technical Dossier

Product Details And Specifications

Yokogawa ATR Series Technical Notes

The Yokogawa ATR series analog I/O modules occupy a foundational position in distributed control system (DCS) architectures deployed across global heavy industry. Installed in petrochemical complexes, nuclear power facilities, LNG terminals, and crude oil refineries, ATR series modules serve as the primary analog signal interface layer within Yokogawa's CENTUM CS, CENTUM CS 3000, and CENTUM VP platforms. Their 8-channel architecture, dual-redundancy support, and compliance with IEC 61508 SIL requirements have made them a default specification in engineering procurement for continuous process industries. Installed base counts in the hundreds of thousands of nodes globally, with active deployments spanning facilities commissioned from the mid-1990s through the present decade.

The Evolution of ATR Series Architecture

The ATR series was introduced as part of Yokogawa's CENTUM CS platform in the mid-1990s, replacing earlier analog I/O cards that lacked field bus integration and redundancy switching. The original ATR8S designation established the 8-channel single-ended analog input standard, with the suffix codes (S1, S2, S3) denoting successive hardware revisions addressing EMC compliance, HART protocol pass-through capability, and extended operating temperature ranges.

With the transition to CENTUM CS 3000 (circa 2000–2008), ATR modules were re-validated for compatibility with the new FCS (Field Control Station) backplane architecture. The S2 revision — as in the ATR8S-00 S2 — introduced improved isolation between channels and enhanced diagnostics accessible via the CENTUM engineering workstation. The S3 revision followed with firmware-level HART variable mapping.

ATR Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the Yokogawa ATR series. Modules are classified by functional category:

Analog Input Modules

• ATR8S-00 S1: 8-ch analog input, 4–20 mA, first hardware revision, CENTUM CS compatible
• ATR8S-00 S2: 8-ch analog input, 4–20 mA, enhanced channel isolation, CENTUM CS/CS3000 compatible
• ATR8S-00 S3: 8-ch analog input, 4–20 mA, HART pass-through enabled, CS3000/VP compatible
• ATR8S-01 S2: 8-ch analog input, 1–5 V DC signal range, dual-redundancy support
• ATR8S-02 S2: 8-ch analog input, thermocouple/RTD universal input, cold junction compensation
• ATR8S-03 S2: 8-ch analog input, high-speed sampling, 100 ms scan rate
• ATR8S-04 S2: 8-ch analog input, intrinsically safe barrier interface, Zone 1 rated

Analog Output Modules

• ATR8D-00 S1: 8-ch analog output, 4–20 mA, first revision, CENTUM CS platform
• ATR8D-00 S2: 8-ch analog output, 4–20 mA, improved output driver stability, CS/CS3000
• ATR8D-00 S3: 8-ch analog output, HART command support, VP-compatible firmware
• ATR8D-01 S2: 8-ch analog output, 1–5 V DC, high-impedance load drive
• ATR8D-02 S2: 8-ch analog output, redundant output path, SIL 2 loop applications

Mixed / Combination Modules

• ATR4S4D-00 S2: 4-ch analog input + 4-ch analog output, compact mixed I/O for space-constrained FCS slots
• ATR4S4D-01 S2: 4-ch AI + 4-ch AO, HART-enabled on all channels, CS3000/VP

Redundancy & Bus Interface

• ATR8S-R S2: Redundant analog input module, hot-standby switchover, paired with primary ATR8S-00 S2 in dual-FCS configurations
• ATR8D-R S2: Redundant analog output module, bumpless transfer on fault detection

Quality Control for the ATR Series Range

ATR series modules present specific test challenges due to their multi-channel analog backplane interface and the precision requirements of 4–20 mA signal conditioning circuits. DriveKNMS applies the following verification procedures to all ATR modules prior to dispatch:

• Backplane connector inspection: Pin continuity and contact resistance measurement on all 96-pin DIN backplane connectors, with rejection threshold set at >0.5 Ω per pin.
• Channel-by-channel analog calibration: Each of the 8 channels is driven with a precision current source (Fluke 725 or equivalent) and output verified against a 6.5-digit DMM. Linearity error must be within ±0.05% of span.
• Isolation voltage test: Channel-to-channel and channel-to-backplane isolation verified at 500 V DC for 60 seconds, per IEC 61010-1.
• HART communication verification (S3 revision): HART master device connected to confirm variable mapping and device descriptor response on all channels.
• Burn-in cycle: 48-hour powered operation at 40°C ambient prior to final inspection, targeting early-life failure detection.
• Functional FCS slot test: Where test bench infrastructure permits, modules are seated in a live CENTUM CS3000 or VP FCS chassis and verified via the CENTUM engineering workstation for correct tag recognition and I/O scan response.