Description
ICS Triplex T8300 Trusted TMR Expander Chassis
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ICS Triplex / Rockwell Automation |
| Model | T8300 |
| Series | Trusted TMR |
| Product Type | Expander Chassis |
| System Architecture | Trusted Triple Modular Redundancy |
| Supply Rating | 20–32 VDC |
| Recommended External Fuse | 20 A |
| Processor Module | T8310 |
| Expander Interface Module | T8311 |
| I/O Architecture | Trusted Inter-Module Bus / chassis backplane |
| Mounting | Swing frame or fixed frame |
| Rear Panel Mounting | Supported with T8380 panel mounting kit |
| Environmental Certification | Ordinary / hazardous-location approvals are documented for the T8300 family |
| RoHS | Documented in Trusted environmental approvals |
Rockwell’s Trusted environmental documentation lists T8300 as an Expander Chassis and shows compliance coverage for ordinary-location and hazardous-location applications, together with RoHS status.
Product Introduction
The ICS Triplex T8300 is the Trusted TMR Expander Chassis, used to extend the I/O capacity of a Trusted safety-control installation. It provides the chassis-level infrastructure in which the expander processor and I/O hardware are installed. The chassis itself is not the processor or an individual I/O module.
A typical expansion assembly uses the T8300 chassis together with T8310 Expander Processor modules, T8311 Expander Interface hardware, and the appropriate Trusted I/O modules. This arrangement allows remote or distributed I/O assemblies to remain connected to the Trusted controller architecture while maintaining the system’s fault-tolerant design.
ICS T8300
Applications & Field Pitfalls — Engineer’s Perspective
The biggest procurement mistake with is confusing the chassis number with the processor number. Rockwell’s documentation clearly separates , T8310, and T8311: is the chassis, T8310 is the Expander Processor, and T8311 is the Expander Interface. A listing that calls a “TMR Expander Processor” is therefore using the wrong product designation.
Typical Application Areas
- Safety instrumented systems — expansion of Trusted TMR I/O for safety-critical control.
- Emergency shutdown systems — distributed I/O architecture for ESD applications.
- Turbine control — expansion chassis for turbine monitoring and protection I/O.
- Fire and gas systems — distributed Trusted I/O installations.
- Large process plants — remote I/O expansion where field signals are distributed across multiple chassis.
Field Pitfalls
- is not a processor module. The actual expander processor is T8310.
- Check the chassis address before commissioning. Trusted documentation identifies chassis addressing as part of installation/configuration.
- Verify the complete chassis population. The chassis, T8310 processor, T8311 interface, I/O modules, termination assemblies, and associated cables form a system-level combination.
- Check the 24 VDC supply architecture. The documented supply range is 20–32 VDC, with a 20 A external fuse advised. Do not assume a generic 24 VDC rack supply is automatically suitable.
- Do not substitute T8300C without checking the exact system documentation. The Trusted product family includes revised/conformal-coated variants, and the complete installed configuration should determine the replacement.
- Inspect the backplane and module connectors. For a used chassis, bent or damaged connector pins can create intermittent faults that are easily mistaken for a processor or I/O problem.
Related Products
- — Trusted TMR Expander Processor. Installed in the and provides the slave-side interface between the Expander Bus and the chassis backplane.
- T8311 — Trusted TMR Expander Interface. Provides the interface between the main Trusted controller assembly and expansion architecture.
- T8312-4 — Expander Interface Adaptor, 4-way configuration.
- T8312-7 — Expander Interface Adaptor, 7-way configuration.
- T8314 — Trusted Fiber TX/RX Unit for longer-distance expander communications.
- T8403 — Trusted TMR 24 VDC digital input module, 40 channels.
- T8431 — Trusted TMR 24 VDC analog input module, 40 channels.
- T8451 — Trusted TMR 24 VDC digital output module, 40 channels.
- T8461 — Trusted TMR 48 VDC digital output module, 40 channels.
- T8100 — Trusted processor chassis used for the main controller assembly rather than the remote expansion chassis.
Procurement Note
Specify the item as:
ICS Triplex — Trusted TMR Expander Chassis
Do not describe it simply as a “ processor.” For a complete replacement, verify the chassis marking, revision, physical connector condition, chassis address, power arrangement, and the installed configuration.
The distinction is particularly important when purchasing legacy Trusted hardware. = Expander Chassis; = Expander Processor; = Expander Interface. Rockwell Automation’s current documentation maintains this separation.
For a used or surplus chassis, inspection should include the rear connectors, backplane, mounting hardware, chassis address configuration, and any signs of corrosion or mechanical damage. A visually clean chassis is not sufficient evidence that the backplane and power distribution paths are serviceable.
