Description

The ICS Triplex T8850 is a high-integrity analog and digital output Field Termination Assembly (FTA) designed for use in safety-critical process control applications. Manufactured by Rockwell Automation under the ICS Triplex product line, this module integrates seamlessly into Triconex-based safety instrumented systems (SIS).

Although marketed as an “Analog Digital Output FTA,” the T8850 primarily functions as a digital output interface that routes signals from the main controller to field devices through a dedicated termination assembly. It supports up to 40 isolated digital output channels, each rated for 24 V DC, ensuring reliable actuation of solenoids, relays, and other final control elements.

This FTA features a rugged, compact enclosure measuring 302 mm × 125 mm × 62 mm and weighs 0.62 kg. It is engineered for operation in harsh industrial environments, including oil & gas, chemical processing, and power generation facilities. The module complies with functional safety standards such as IEC 61508 and IEC 61511, making it suitable for applications requiring SIL 2 or SIL 3 integrity levels.

Key technical attributes include:

• Model: T8850
• Manufacturer: Rockwell Automation (ICS Triplex)
• Module Type: Field Termination Assembly (FTA) for digital outputs
• System Compatibility: Triconex TMR (Triple Modular Redundant) PLC systems
• Output Type: Digital (24 V DC), non-intrinsically safe
• Channel Count: 40 isolated outputs
• Mounting: DIN rail or rack-mounted within certified ICS Triplex chassis
• Communication Interface: Backplane connection to Triconex main processor (no onboard Ethernet; external Ethernet routing handled at system level)
• Status Indication: LED indicators for channel and module health
• Product Origin: USA
• HS Code: 8537101190
• Minimum Order Quantity: 1 unit
• Availability: Limited stock (product officially discontinued as of December 31, 2018)