Description

The ICS Triplex T8161B Digital Input Module is a high-reliability safety I/O module developed by ICS Triplex, a Rockwell Automation brand, for use in safety-critical industrial control systems. It is designed to meet the demanding reliability, availability, and fault-tolerance requirements of process industries where system failure is not an option.

Compatible with Triplex Tricon and TriconEX safety control systems, the T8161B provides accurate acquisition, real-time transmission, and continuous safety monitoring of discrete digital field signals. Its redundant design architecture and built-in diagnostics support compliance with SIL 3 safety integrity level requirements under international functional safety standards.

Widely used in industries such as petrochemical processing, power and energy, rail transit, and nuclear facilities, the T8161B forms a reliable foundation for stable, uninterrupted industrial operations.

Key Features

• Safety-rated digital input module for Triplex safety systems

• Redundant architecture for high availability and fault tolerance

• Supports SIL 3 functional safety applications

• 16-channel discrete digital input capability

• Compatible with 24 VDC and 48 VDC industrial signals

• Fast input response time of up to 1 ms

• Optical isolation and EMC-compliant design

• Hot-swappable, modular plug-and-play construction

Safety Redundant Design

The T8161B employs dual independent signal acquisition channels along with redundant communication paths, enabling continuous operation even in the presence of a single fault. Built-in self-diagnostics detect abnormal conditions in real time and automatically switch to the healthy path when required.

This design complies with key international safety standards, including IEC 61508 and EN 50159, ensuring reliable operation in high-risk industrial environments.

Highly Adaptable Signal Acquisition

• 16 discrete digital input channels per module

• Supports standard 24 VDC and 48 VDC field signals

• 1 ms response time, enabling rapid detection of critical events

• Compatible with a wide range of industrial sensors, switches, and protective devices

This flexibility allows seamless integration with diverse field equipment across different industries.

Anti-Interference and Operational Stability

The module incorporates photoelectric (optical) isolation and a robust EMC electromagnetic compatibility design, providing strong resistance to:

• Electromagnetic interference (EMI)

• Voltage fluctuations

• Electrical noise common in industrial environments

With an operating temperature range of –40 °C to +70 °C, the T8161B is well suited for harsh and extreme operating conditions.

Easy Integration and Maintenance

The T8161B features a modular, hot-swappable design, allowing installation, replacement, or maintenance without shutting down the system. Clear front-panel LED indicators provide real-time feedback on channel status and fault conditions, simplifying troubleshooting and reducing maintenance time.