Rockwell / Allen-Bradley T9110 Processor Module

The T9110 Processor Module is the core processing unit of an AADvance® Controller and is responsible for performing critical safety and process control tasks. Below is a comprehensive overview of the module’s functionality, specifications, and key features.

Core Functions:

Execution of the AADvance Safety Kernel to solve application logic.
Interface with I/O modules for reading input data and writing output data.
Communication with other processor modules locally and across control networks.
Initiation of periodic diagnostics for the controller.
Communication with external systems, such as Human-Machine Interfaces (HMIs).
Message encapsulation and verification for secure communication to other nodes in the system.

Key Features:

Fault Tolerance & Redundancy:
- Galvanic Isolation: The processor module is isolated from external power supplies and data links to prevent field faults from affecting the module’s operation.
- Redundant Power Supplies: The module operates continuously even if one of its dual redundant 24Vdc power supplies fails.
- Under/Over-voltage Protection: The internal power supplies are equipped with protection circuits that signal “power valid” for diagnostic monitoring.
- Automatic Fault Detection & Failover:
  - If the module detects a fault in a redundant configuration (1oo2D or 2oo3D), the system can automatically replace the faulty processor without disrupting the operation of the controller.
  - New processors automatically self-educate and synchronize with the existing system without requiring a system shutdown.
Diagnostics and Watchdog Circuit:
- The module runs regular internal diagnostic tests and employs a watchdog circuit to monitor processor performance.
- In case of a serious fault, the processor will shut down safely.
- In a redundant processor setup, a failed processor can be replaced online, ensuring no disruption of the other processors.

Processor Module Specifications:

Attribute	Value
Functional Characteristics
Degradation Modes	1oo1D, 1oo2D, 2oo3D
Processor Clock	400 MHz
Memory
– Boot Flash	512 kB
– SRAM	512 kB
– Bulk Flash	64 MB
– SDRAM	32 MB
Event Resolution (for internal variables)	1 ms
Time-stamp Accuracy	Application Scan
Self-Test Interval	< 5.5 hours
Performance Characteristics
Safety Integrity Level (SIL)	1 Processor: SIL 1 (Non-safety applications) 2 Processors: SIL 3 (Safety applications) 3 Processors: SIL 3 (Fault-tolerant and TMR safety applications)
I/O Modules Supported	48
Electrical Characteristics
Module Supply Voltage	Redundant +24 Vdc (Nominal) 18-32 Vdc (Range)
Power Dissipation	8 W (27.3 BTU/h)
Typical Surface Temperature	43 °C ± 5 °C
Mechanical Specifications
Dimensions (Height × Width × Depth)	166 mm × 42 mm × 118 mm (6-½ in. × 1-5/8 in. × 4-5/8 in.)
Weight	430 g (15 oz.)
Casing	Plastic, non-flammable

Operational Characteristics:

The T9110 Processor Module can handle safety-critical tasks, ensuring that the AADvance controller is fault-tolerant and capable of handling multiple levels of redundancy and diagnostics.
The module’s redundancy and self-healing features ensure that the system remains operational even in the event of hardware faults.
Its SIL 3 capabilities make it suitable for safety-critical applications, while its modular design ensures flexibility and scalability.

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