Description

The ICS Triplex T3491 is a high-integrity, multiplexed analog input module designed for the Regent Control System, a fault-tolerant industrial automation platform developed by ICS Triplex (a Rockwell Automation company). This module enables reliable acquisition and processing of analog signals from field transmitters in safety-critical applications.

Unlike standard PLC I/O modules, the T3491 operates within a dual-redundant architecture that supports continuous diagnostics and automatic fault isolation. It interfaces with 4–20 mA or 1–5 V analog sensors commonly used in process industries, converting these signals into digital data for use by the Regent controller.

Each T3491 module supports up to 16 analog input channels, which are scanned sequentially through internal multiplexing circuitry. This design reduces hardware complexity while maintaining signal integrity and system availability. Onboard self-diagnostics monitor for open circuits, short circuits, and out-of-range conditions, providing real-time health status to the control system.

The module is engineered for use in demanding environments such as oil refineries, chemical plants, and power stations. It features robust EMI/RFI shielding, wide operating temperature tolerance, and compliance with functional safety standards including IEC 61508 (up to SIL 2).

Key specifications:

• Model Number: T3491
• Manufacturer: ICS Triplex (Rockwell Automation)
• Product Line: Regent Control System
• Module Type: Multiplexed Analog Input Module
• Input Channels: 16 (multiplexed)
• Signal Types: 4–20 mA (loop-powered or passive), 1–5 V DC
• Accuracy: ±0.1% of span (typical)
• Isolation: Channel-to-channel and channel-to-backplane
• Dimensions: 32 mm × 265 mm × 358 mm (W × H × D)
• Weight: 1.82 kg
• System Compatibility: ICS Triplex Regent dual-redundant PLC
• Status: Active product (not discontinued)
• Country of Origin: USA
• HS Code: 8537101190
• Minimum Order Quantity: 1