product description：

The Rockwell ICS Triplex T9431 (9431AI) is a fault-tolerant analog input module designed for critical process control in safety systems. Part of the Trusted® TMR platform, it provides triple-redundant 4-20mA/0-10V input channels with continuous self-diagnostics. Certified for SIL3 applications, it ensures fail-safe operation in oil & gas, power generation, and chemical plants where zero downtime is mandatory.

Core Function

Feature Explanation

Main Function 8-channel isolated analog input (current/voltage) for industrial process signal acquisition and monitoring

Redundant Architecture Supports three configurations: Simplex (single channel), Dual (double channel), and TMR (triplex redundancy)

Safety Level Complies with IEC 61508 SIL 3 safety integrity level

Communication Protocol Ethernet, supports Modbus TCP / OPC UA / Profibus DP / Ethernet/IP

Online Hot Swap ✅ Supports online replacement without downtime

Diagnostic Function Each channel supports 5 configurable voltage bands + 8 switch thresholds, supporting line monitoring, loop monitoring, and on-site equipment diagnosis

Comparison of the same series modules of the AADvance series

Model Function Channel Count

T9110 Processor Module —

T9300 I/O Base Board —

T9401 Analog Input (AI), 24VDC, Isolated 8 Channels

T9402 Analog Input (AI), 24VDC, Isolated 16 Channels

T9431 ⭐ Analog Input (AI), Isolated 8 Channels

T9432 Analog Input (AI), Isolated 16 Channels

T9451 Digital Output (DO), 24VDC, Shared Terminal 8 Channels

T9481 Analog Output (AO), Isolated 3 Channels

T9482 Analog Output (AO), Isolated 8 Channels

T9801/02/03 Digital Input TA (Safety Type) 16 Channels

T9831/32/33 Analog Input TA (Safety Type) 16 Channels

T9851/52 Digital Output TA (Safety Type) 8 Channels

T9881/82 Analog Output TA (Safety Type) 8 Channels