ICS Triplex T9831
ICS Triplex T9831
ICS Triplex T9831
ICS Triplex T9831
ICS Triplex T9831

ICS Triplex T9831 | Trusted System Modbus TCP Interface Module

  • Brand: ICS Triplex
  • Model: 9831
  • Product Type: Communication Interface Module
  • Series: Trident / Trusted
  • Core Function: Provides Modbus TCP communication gateway between safety controller and networked devices.
  • Key Specs: Modbus TCP protocol support, configurable as server or client.
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Part number: ICS Triplex T9831
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Description

9831: Product Overview
The 9831 is a dedicated communication interface module designed for integration into the ICS Triplex Trident and Trusted safety instrumented system (SIS) architectures. It occupies a single slot in a standard system chassis and serves as a protocol gateway, enabling data exchange between the safety logic solver and external devices connected via a Modbus TCP network. Its role is to translate messages between the system’s internal backplane communication and the Modbus TCP standard, allowing the safety controller to interact with a wide range of networked field instruments, drives, and distributed I/O systems.
The core functionality involves managing the transmission and reception of Modbus TCP data packets. The module can be configured as a Modbus TCP server (responding to requests from a client) or a client (initiating requests to a server), providing flexibility in network topology. It handles cyclical and acyclic data exchange, ensuring process values from the field are available to the safety application and control commands from the logic solver are executed by field devices. The 9831 belongs to the Trident and Trusted product families, platforms engineered for fault tolerance and compliance with IEC 61508. The benefit of this integration is a unified architecture where communication, logic solving, and I/O processing work cohesively, simplifying validation and enhancing system integrity.

ICS Triplex T9831

ICS Triplex T9831

9831: Technical Specifications
  • Model Number: 9831
  • Manufacturer: ICS Triplex
  • Product Type: Modbus TCP Communication Module
  • Supported Protocol: Modbus TCP/IP (RFC 793)
  • Network Role: Configurable as Server or Client
  • Data Transfer Rate: 10/100 Mbps Ethernet
  • Power Supply: 5 VDC (via chassis backplane)
  • Operating Temperature: -40°C to +70°C (-40°F to +158°F)
  • Dimensions: 31.8 mm x 128.3 mm x 119.9 mm (1.25 in x 5.05 in x 4.72 in)
  • Weight: Approximately 0.45 kg (0.99 lbs)
  • Safety Integrity Level: SIL 3 (when integrated into a certified SIS)
  • Certification: TÜV Rheinland certified
  • Connector: RJ45 Ethernet port (shielded)
  • Memory: 2 MB buffer for data transactions
Core Features & Customer Value​
Native Modbus TCP Integration: The module eliminates the need for third-party protocol converters by providing direct Modbus TCP connectivity. For engineers, this reduces system complexity, minimizes potential failure points, and simplifies troubleshooting. It allows existing Modbus TCP networks to be incorporated into the safety loop without additional hardware, streamlining integration with legacy or mixed-vendor systems.
Server/Client Configuration Flexibility: The ability to operate as either a Modbus TCP server or client adapts to diverse network architectures. As a server, it exposes safety system data to HMIs or DCS clients; as a client, it polls remote I/O or intelligent devices. This versatility simplifies design for applications ranging from centralized monitoring to distributed control, reducing engineering rework.
High-Speed Ethernet Connectivity: With 10/100 Mbps support, the module ensures rapid, deterministic data exchange. For safety applications, this translates to timely updates of critical parameters, enhancing response accuracy during process upsets. The RJ45 connector with shielding mitigates electromagnetic interference, ensuring reliable communication in electrically noisy environments.
Integrated Diagnostic Monitoring: The module continuously checks network status, connection integrity, and data transaction errors. For maintenance teams, this provides early fault indication (e.g., link loss, timeout errors), enabling proactive intervention before communication failures impact safety functions. Diagnostic data is accessible via the system software, accelerating root cause analysis.
Unified Engineering Workflow: Configuration is managed through the standard Trident/Trusted system software suite, allowing engineers to map Modbus registers to internal memory addresses using a familiar interface. This streamlines project setup, reduces configuration errors, and aligns with the broader system’s lifecycle management practices.

ICS Triplex T9831

ICS Triplex T9831

Typical Applications​
The 9831 is deployed in safety systems requiring integration with Modbus TCP networks. In a large-scale oil refinery, it connects a Trident safety system to a bank of Modbus TCP-enabled smart transmitters on a distillation column. The safety system monitors transmitter values (e.g., temperature, pressure) and issues shutdown commands via the module, all over the existing Ethernet network.
In a natural gas processing facility, the module serves as a client to a Modbus TCP-distributed I/O rack controlling a compressor skid. The Trusted safety system polls the rack for valve positions and motor status, using the 9831 to trigger a controlled shutdown if abnormal conditions are detected.
Another application is in a pharmaceutical plant’s cleanroom environmental control, where the 9831 links a safety controller to Modbus TCP actuators managing HVAC dampers. During a contamination event, the safety system uses the module to seal the room, with the high-speed Ethernet ensuring rapid actuation.

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