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ASS9981DE-01

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Yokogawa ASS9981DE-01 is a 10+2 slot rack that serves as the central backplane for Yokogawa CENTUM distributed control systems, supporting redundant CPU modules, communication cards, and I/O modules.
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Technical specifications for ASS9981DE-01

  • Manufacturer:
    Yokogawa
  • Part Number:
    ASS9981DE-01
  • Product Family:
    Centum CS-Centum VP
  • Product Type:
    10+2 Slot Rack
  • Stock:
    1
  • Physical Slots:
    12 physical slots
  • General Purpose Slots:
    10 (for communication cards, network interface cards, or I/O cards)
  • Core Slots:
    2 (dedicated for dual-redundant CPU processor cards)
  • System Compatibility:
    Yokogawa CENTUM series distributed control systems
  • Redundancy Mode:
    Supports Duplex (dual redundancy) hardware hot standby
  • Operating Temperature:
    0 °C to +60 °C
  • Storage Temperature:
    -20 °C to +85 °C
  • Operating Humidity:
    10% to 90% RH (non-condensing surface)
  • Weight:
    0.94 kg
  • Estimated shipping dimensions:
    44.5x13x3.2cm
  • Tariff Code:
    3902100090
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Firmware Configuration Industrial Applications Hardware Architecture

Features:

  • Provides a 10+2 slot architecture with dedicated processor slots and general-purpose expansion slots for flexible system configuration.
  • Supports Duplex hardware hot standby, enabling seamless processor redundancy for continuous process control.
  • Serves as the high-speed communication backplane for Yokogawa CENTUM distributed control systems while supporting industrial operating environments.
Yokogawa ASS9981DE-01 forms the hardware foundation of a Yokogawa CENTUM distributed control system by providing a reliable platform for processor, communication, power, and I/O modules. Rather than performing control functions directly, the rack supplies the physical structure and communication backplane required for coordinated system operation. Twelve physical slots allow users to build scalable control architectures while maintaining organized module installation. The design is well suited for process automation environments where dependable communication is essential.

Redundant control is one of the primary strengths of Yokogawa ASS9981DE-01. Two dedicated processor slots support dual CPU modules operating in a Duplex hot standby configuration, allowing rapid automatic transfer of control if the active processor encounters a fault. Ten additional slots provide installation space for communication interfaces, network modules, power supplies, and distributed I/O hardware. This architecture helps improve system availability while reducing the risk of production interruptions.

Yokogawa ASS9981DE-01 is engineered for continuous industrial service in demanding operating conditions. The rack supports operating temperatures from 0 °C to +60 °C, storage temperatures from -20 °C to +85 °C, and humidity levels of 10% to 90% RH without condensation. Typical applications include petrochemical production, power generation, steel processing, and other industries requiring reliable distributed control and high system uptime. By serving as the communication hub for field devices and operator stations, the rack contributes to stable, long-term process automation.

The ASS9981DE-01 Yokogawa 10+2 Slot Rack may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Yokogawa ASS9981DE-01 10+2 Slot Rack Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Yokogawa ASS9981DE-01 10+2 Slot Rack Specs

General

  • Manufacturer Yokogawa
  • Model ASS9981DE-01
  • Condition New Original ready stock
  • Product Family ASS9881DE-02,ASS9562DK-00
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Firmware Version: Compatible with the latest embedded security firmware for Centum VP R6 and above systems.
  • Redundancy Switching: Built-in dual-path redundant communication firmware, supporting millisecond-level non-disruptive hot standby switching.
  • Online Upgrade: Supports module-level firmware online hot upgrade (RIUP) without affecting system operation.
  • Security Defense: Firmware integrates a network security encryption and verification mechanism compliant with IEC 62443 standard.
  • Oil Refining & Chemical Industry: Used for high-density signal acquisition and control in large-scale oil refinery DCS systems.
  • Offshore Platforms: Suitable for space-constrained and harsh environments such as oil and gas drilling platforms.
  • Combined Cycle Power Generation: Used for high-reliability redundant control systems for gas turbines and steam turbines.
  • Pharmaceutical & Fine Chemical Industry: Meets the configuration requirements for high-precision, high-isolation signals in batch processing technologies.
  • Slot Architecture: Utilizes a design with 10 standard I/O slots plus 2 dedicated power/communication redundant slots.
  • Power Supply Redundancy: Configured with dual 24V DC inputs, supporting independent current sharing for dual power supplies.
  • Module Compatibility: Fully compatible with Yokogawa FIO series high-density analog and digital modules.
  • Installation Method: Standard 19-inch rack mounting, occupying 4U space, supporting front and rear ventilation for heat dissipation.
Description
Yokogawa ASS9981DE-01 is a 10+2 slot rack designed as the central rack and backplane of Yokogawa CENTUM distributed control systems. The rack provides 12 physical slots, including 2 dedicated core slots for dual-redundant processor modules and 10 general-purpose slots for communication cards, network interface modules, power modules, and I/O expansion cards. Acting as the system backbone, it distributes power and enables high-speed communication between installed modules to support stable control system operation.

The rack is built for high-availability process automation where uninterrupted operation is essential. Yokogawa ASS9981DE-01 supports Duplex hardware hot standby, allowing one processor to operate as the active controller while the second processor remains in standby mode. If the active processor experiences a fault, the standby processor automatically assumes control, helping maintain continuous operation in industries such as petrochemical processing, power generation, and steel manufacturing.

Yokogawa ASS9981DE-01 combines a robust hardware structure with industrial-grade environmental performance. Compatible with Yokogawa CENTUM series distributed control systems, the rack operates within a temperature range of 0 °C to +60 °C, withstands storage temperatures from -20 °C to +85 °C, and supports 10% to 90% RH non-condensing humidity. As a high-reliability platform, it enables communication between field devices and operator stations while providing a stable foundation for redundant controllers, communication interfaces, and distributed I/O modules.
Alternative Names
ASS9981DE-O1 ASS998IDE-0I ASS9981DE01 ASS9981DE-02 ASS9562DK-00 ANT502-5F S1 ATI3S-00 S2 ATA4S-00 S2
Technical notes
The Yokogawa ASS9981DE-01 is a highly reliable 10+2 slot rack engineered for Centum VP systems, featuring dual-redundant power supplies to guarantee zero downtime in mission-critical process automation. Its robust 4U standard chassis optimizes cabinet space while delivering high-density I/O connectivity for harsh industrial environments.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What hardware configuration does Yokogawa ASS9981DE-01 provide?
Yokogawa ASS9981DE-01 offers 12 physical slots, including 2 dedicated slots for dual-redundant processor modules and 10 general-purpose slots for communication, network, power, and I/O modules.
Which modules can be installed in Yokogawa ASS9981DE-01?
The rack accommodates dual CPU processor modules, communication interface cards, network interface modules, power modules, and compatible I/O expansion cards used in Yokogawa CENTUM systems.
Does Yokogawa ASS9981DE-01 include processor modules or power supplies?
No. Yokogawa ASS9981DE-01 functions as the slot rack and backplane only. Processor modules, power modules, communication cards, and I/O modules are installed separately according to the system configuration.