ICS TRIPLEX T8461 Trusted TMR Digital Output Module

ICS TRIPLEX T8461 is a high-reliability triple‑modular redundancy (TMR) digital output module belonging to the Trusted® safety system series (Rockwell Automation). 

It features 40 channels of 24V DC (optional 48V DC) relay outputs, supporting 3‑2‑0 fault‑tolerant architecture for hardware‑level fault masking, 

fully compliant with IEC 61508 SIL 3 safety standards. Each channel delivers 0.75A continuous current with electronic short‑circuit protection, response time ≤0.5ms, 

and time‑stamp precision ±0.5ms. The module offers 2500V isolation between field and system sides, built‑in watchdog, and comprehensive diagnostics (open/short detection, 

channel status monitoring). Designed for harsh industrial environments with an operating temperature range of -20°C to +60°C, it is widely deployed in ESD, F&G, SIS, 

and other critical safety applications. This module is discontinued by the manufacturer; market supply is limited to new old stock, refurbished, and used units. 

We provide fully tested T8461 modules with warranty and fast global delivery, and recommend the direct replacement model T8461C for system upgrades.