Name: ICS TRIPLEX T8431 Trusted TMR Analog Input Module - MASSIVE
Brand: Allen-Bradley

Description

ICS TRIPLEX T8431 Trusted TMR Analog Input Module

Product Overview

T8431 is a high‑density 40‑channel TMR analog input module for Rockwell ICS TRIPLEX Trusted SIS safety‑instrumented systemSaul Elect…. It adopts Triple Modular Redundancy (TMR) 2‑out‑of‑3 voting architecture, converts field transmitter 0‑22 mA / 0‑6 VDC analog signals into digital values for safety logic processing. Variant T8431C is conformal‑coated for corrosive cabinet environments. It supports per‑channel line fault monitoring, 1 ms‑resolution on‑board SOE timestamp recording, and hot‑swap online replacement. TÜV certified SIL 3 compliant to IEC 61508. Legacy safety hardware; OEM production discontinued, mainly supplied as spare‑parts for oil‑gas, chemical and power‑plant SIS installations。

T8431

Typical Applications

Oil‑gas & petrochemical SIS: Process‑variable acquisition for ESD emergency shutdown and F&G fire‑gas safety systems; pressure, flow and temperature transmitter signal collection
Chemical plant safety interlock: High‑density analog input for large‑scale safety‑instrumented loops
Power‑plant safety system: Safety‑related analog measurement for boiler and turbine protection
Off‑shore platform safety cabinet: Field‑signal acquisition under high‑humidity and salt‑spray ambient conditions
Brown‑field retrofit & spare‑part replacement: Renewal of analog‑input hardware for existing Trusted main / expander chassis

Specifications & Technical Parameters

Item	Specification
Model	T8431; Conformal‑coated variant: T8431C
System Compatibility	ICS TRIPLEX Trusted TMR SIS platform
Channel Count	40 TMR analog input channelsNEX Instru…
Input Signal	0‑22 mA current / 0‑6 VDC voltage
Resolution	3.9 µA
Calibration Accuracy	0.03 %; Safety accuracy ±1 % FS
Sample Update Time	0.5 ms
SOE Timestamp Resolution	1 ms
Galvanic Isolation	2500 V impulse withstand isolation
Power Supply	20‑32 VDC, power consumption 15‑18 W
Safety Certification	TÜV SIL 3 (IEC 61508)
Hot‑swap Support	Yes, online replacement without SIS shutdown
Line Diagnostics	Per‑channel configurable open‑circuit / short‑circuit detection
Operating Temperature	‑5 ℃ ~ +60 ℃
Storage Temperature	‑25 ℃ ~ +85 ℃
Humidity	5‑95 % RH, non‑condensing
Indicators	Front‑panel LED for slice health, channel fault and module status
Mounting	Single‑slot plug‑in for Trusted main / expander chassis
Weight	Approx. 1.15 kg
Certifications	CE, UL compliant
Protection Class	IP20 (cabinet‑mount only)

Key Features & Benefits

40‑channel high‑density TMR acquisition: Each channel implements triple‑signal‑path 2‑out‑of‑3 hardware voting, eliminates single‑point‑failure risk for analog measurement loops, meets SIL 3 safety‑integrity requirements.
Flexible signal compatibility: Supports industry‑standard 0‑22 mA and 0‑6 VDC field transmitters, widely compatible with safety‑related process sensors.
Per‑channel line‑monitoring function: Independently detects field‑wiring open‑circuit and short‑circuit faults, reports diagnostic alarms without interfering with normal safety‑system operation.
On‑board high‑precision SOE: 1 ms time‑stamped event recording, captures analog‑channel state changes for post‑trip fault analysis.
Hot‑swap maintainability: Supports online module replacement while SIS keeps running, reduces plant downtime during overhaul and maintenance work.
High‑voltage galvanic isolation: 2500 V isolation barrier protects internal safety electronics from field‑side surge and EMI interference.
Conformal‑coated option (T8431C): Enhanced moisture‑resistance and anti‑corrosion performance for offshore, coastal and corrosive cabinet environments.
Seamless Trusted‑platform integration: Works together with Trusted processor, expander modules and FTA termination hardware.