Allen Bradley ICS

Overview

Brand Name:	ICS TRIPLEX
Model Number:	T8850
Country of Origin:	USA
Packaging Details:	Original new Factory Sealed
Delivery Time:	Delivery time in stock
Payment Terms:	T/T

Contact for quotation

Sales Manager:	Stella
Send an email:	[email protected]
Contact in Whatsapp:	+86 18159889985

Specifications

Parameter	Specification
Model	T8850
Manufacturer	ICS Triplex / Rockwell Automation
Product Type	40-Channel Analogue or Digital Output Field Termination Assembly (FTA)
Architecture	Trusted TMR (Triple Modular Redundant) system component
Compatible Modules	T8451 (24 Vdc DO), T8461 (24/48 Vdc DO), T8480 (Analogue Output)
Number of Channels	40 (arranged in 5 isolated groups × 8 channels)
Field Voltage	24 Vdc nominal (18–32 Vdc range)
Max Field Voltage (Without Damage)	60 Vdc
Terminal Wire Size	12 to 28 AWG
Connections	Screw-clamp terminals; 2-wire field device connections
Mounting	Standard DIN rail (TS32 or TS35, horizontal or vertical)
Connectors	JDH1 (SmartSlot), JDH2 (96-pin signal), P1 (10-way power)
LED Indicators	On-board per-group field power status
SmartSlot Support	Yes – ‘one to many’ hot replacement
Safety Certification	SIL-3 (IEC 61508), TÜV
Certifications	CE, UL
Dimensions (approx.)	30.2x12.5x6.2cm
Weight	0.62kg
Operating Temperature	–20°C to +70°C

Description

The T8850 is a 40‑channel Field Termination Assembly (FTA) from ICS Triplex‘s Trusted series, engineered as the primary interface between Trusted TMR output modules and field actuators in safety instrumented systems. The T8850 provides 40 output channels arranged in five isolated groups of eight, each with independent power and fused protection. The T8850 is compatible with T8451 (24 Vdc digital output), T8461 (24/48 Vdc digital output), and T8480 (analogue output) modules, and supports SmartSlot hot‑swap capability for online replacement without rewiring. With screw‑clamp terminals, DIN rail mounting, and on‑board LED power status indication, the T8850 delivers reliable, high‑density output termination for emergency shutdown and process interlock applications.

Installation & Wiring

Mounting – Install the T8850 on a standard TS32 or TS35 DIN rail in horizontal or vertical orientation as required.
Module Connection – Connect the Trusted output module (T8451, T8461, or T8480) to the FTA via a dedicated SmartSlot or Companion Slot cable (e.g., TC‑200 series). The cable terminates at JDH2 (96‑pin signal) and JDH1 (SmartSlot) connectors on the FTA.
Field Wiring – Connect field devices (valves, solenoids, indicators) to the TB2 dual‑height terminal blocks using 2‑wire connections. Use screw‑clamp terminals with 12–28 AWG wire.
Power Supply – Connect dual 24 Vdc field power feeds to the P1 10‑way terminal block. Each of the five isolated groups (8 channels) receives independent power with individual fused protection.
0V Reference – The 0V connection at the FTA end allows the module to measure its output voltage. Connect this to the field 0V supply.
LED Indication – On‑board LEDs provide visual status of field power integrity for each power group.
Hot‑Swap – SmartSlot support enables replacement of output modules without disconnecting field wiring or system shutdown.

Features

40 High‑Density Output Channels – Supports up to 40 field output loops in a single FTA, maximising cabinet space efficiency
Five Isolated Power Groups – Each group of 8 channels is independently isolated, preventing cross‑group interference and containing faults to the affected group
Per‑Group Fused Protection – Each group has independent, replaceable fuses; a single‑channel fault does not cascade to other groups
Dual Purpose Analogue/Digital Support – Compatible with both digital output modules (T8451, T8461) and analogue output modules (T8480)
SmartSlot Hot‑Swap Capability – Enables ‘one to many’ online replacement of output modules without rewiring field cables
Screw‑Clamp Terminals – Accepts 12–28 AWG wire for secure, reliable field connections
Standard DIN Rail Mounting – Compatible with TS32 or TS35 rails, horizontal or vertical installation
On‑Board LED Indication – Provides visual field power status for each channel group, simplifying troubleshooting
SIL‑3 Certified – Meets IEC 61508 SIL‑3 safety integrity requirements for critical safety applications
Robust Electrical Isolation – Group‑to‑group isolation suppresses ground loop interference from VFDs and excitation cabinets

Theory of Operation

The T8850 functions as the passive termination and signal distribution hub between the Trusted TMR output module (T8451, T8461, or T8480) and the field actuators. It does not perform active logic processing—that function resides in the Trusted output module itself. Instead, the T8850 provides the physical interface for field wiring, power distribution, and signal routing.

The 40 output channels are grouped into five isolated banks of eight channels each. Each group receives independent 24 Vdc field power from the P1 terminal block, with individual fused protection per channel. This group isolation ensures that a short circuit or overcurrent fault on one channel is contained within that group and does not affect other groups or the system logic.

Signals from the Trusted output module are transmitted to the T8850 via a dedicated 96‑pin SmartSlot or Companion Slot cable (e.g., TC‑200 series). The cable connects to JDH2 (signal) and JDH1 (SmartSlot) on the FTA. The field power return (0V) connection at the FTA provides a reference for the output module to measure its output voltage.

On‑board LEDs indicate field power integrity for each group, enabling rapid visual fault diagnosis. The SmartSlot interface supports hot‑swap replacement of output modules without disconnecting field wiring, minimising downtime during maintenance. The T8850 is designed to meet SIL‑3 safety integrity requirements, making it suitable for emergency shutdown (ESD), fire & gas (F&G), and burner management systems (BMS).

FAQ

Q1: What is the primary function of the T8850?

A1: The T8850 is a 40‑channel Field Termination Assembly (FTA) that provides the physical wiring interface between Trusted TMR output modules (T8451, T8461, T8480) and field actuators such as valves, solenoids, and indicators.

Q2: Which output modules are compatible with the T8850?

A2: The T8850 is compatible with the T8451 (24 Vdc digital output), T8461 (24/48 Vdc digital output), and T8480 (analogue output) Trusted TMR modules .

Q3: How many channels does the T8850 provide and how are they arranged?

A3: The T8850 provides 40 output channels, arranged in five isolated groups of eight channels each.

Q4: Does the T8850 support hot‑swappable module replacement?

A4: Yes. The T8850 features a SmartSlot connection that enables ‘one to many’ hot replacement of output modules without disconnecting field wiring or shutting down the system.

Q5: What safety certification does the T8850 hold?

A5: The T8850 is certified to SIL‑3 per IEC 61508 and carries TÜV, CE, and UL approvals, making it suitable for safety‑critical applications such as emergency shutdown and process interlock systems.

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