Description
The Rockwell Automation / ICS Triplex T8830 is a 40-Channel Fused Analog Input Field Termination Assembly (FTA) engineered for the Trusted Triple Modular Redundant (TMR) Safety Instrumented System (SIS).
Serving as the primary interface between field instrumentation and the Trusted T8431 TMR Analogue Input Module, the T8830 conditions 4–20 mA field signals, distributes loop power, and provides galvanic protection for high-integrity Emergency Shutdown (ESD) and Fire & Gas (F&G) control loops.
Technical Specifications
| Parameter | Specification |
| Manufacturer | Rockwell Automation / ICS Triplex |
| System Platform | Trusted TMR Safety System (SIL 3) |
| Model Number | T8830 |
| Assembly Type | 40-Channel Fused Field Termination Assembly (FTA) |
| Target I/O Module | Trusted T8431 40-Channel Analogue Input Module |
| Input Channels | 40 analog channels (2-wire field connections) |
| Field Loop Power | Dual 24 V DC feeds (diode ‘commoned’ on board) |
| Channel Protection | Individual 50 mA field fuses per channel |
| Sense Resistor | 250\ \Omega precision resistor per channel (1–5 V conversion) |
| Connector Type | 96-way SK1 socket (ribbon/cable to T8431 I/O module) |
| Mounting Format | TS32 / TS35 standard DIN rail mounting |
Core Features & Operating Capabilities
- Redundant Field Power Distribution: Dual 24 V DC power inputs are diode-ORed across the board, ensuring continuous loop power to field transmitters even if one supply rail fails.
- Per-Channel Current Limiting: Each channel features a 50 mA quick-acting fuse to limit fault currents and protect adjacent channels from field shorts.
- Onboard Power Diagnostics: Green LED indicators provide immediate visual confirmation of power rail health and supply integrity.
- SmartSlot Integration: Supports SmartSlot connections (via SK1/SK2 headers), allowing “one-to-many” hot swapping and online module replacement without interrupting active safety loops.
- High-Density Field Connections: Terminal blocks (12x 3-way, 2x 2-way) allow clean, structured 2-wire transmitter wiring directly inside control cabinets.
Related Trusted TMR System Hardware
- T8431 — Trusted 40-Channel TMR Analogue Input Module.
- T8850 — Trusted 40-Channel Digital Input FTA.
- T8110B / T8111 — Trusted TMR Processor Modules.
- T8310 — Trusted TMR Expander Interface Module.



