TRICONEX 8311 16-Channel Digital Output Module for Tricon Safety Instrumented System (SIS)

Product Description

The TRICONEX 8311 is a high-reliability 16-channel digital output module, a critical component of the TRICONEX Tricon triple modular redundant (TMR) safety instrumented system (SIS), engineered to execute safety interlock commands and drive critical field devices in hazardous industrial environments. Designed for SIL 3-certified safety applications, this module features 16 isolated Form C (SPDT) relay outputs, delivering fail-safe control for emergency shutdown (ESD), fire & gas (F&G), and process safety systems in oil & gas, chemical, petrochemical, and power generation facilities. Built with TRICONEX’s patented TMR architecture, it eliminates single points of failure, while channel-level isolation (1500 V AC) and robust EMI immunity ensure stable operation in electrically noisy environments. The 8311 complies with IEC 61508 SIL 3, FM, CSA, and ATEX standards, supports hot-swappable maintenance, and incorporates advanced self-diagnostics to monitor relay health and output status, making it an essential component for mission-critical safety control.

Key Functions

The TRICONEX 8311 module converts digital safety logic signals from the Tricon SIS controller into physical relay outputs to actuate critical field devices (solenoid valves, alarm horns, shutdown valves, pump starters). Its 16 Form C (SPDT) relays offer normally open (NO) and normally closed (NC) contacts for fail-safe operation, with each channel rated for 5A @ 250V AC/30V DC to accommodate diverse industrial loads. Triple modular redundant signal processing and voting logic ensure that a single channel fault does not compromise system integrity, while built-in self-diagnostics continuously monitor relay coil status, contact wear, and output circuit continuity, generating real-time alarms for open/short circuits or relay failures. Channel-level isolation prevents cross-channel interference and ground loops, and the module supports configurable output latching/unlatching modes to align with safety interlock requirements. Hot-swappable design allows module replacement without SIS shutdown, maximizing system uptime for critical safety applications.

Application Scenarios

The TRICONEX 8311 digital output module is deployed exclusively in safety-critical applications requiring SIL 3 certification and fault tolerance. In oil & gas facilities (offshore platforms, refineries, FPSOs), it triggers emergency shutdown (ESD) valves, fire suppression systems, and gas detection alarms in response to abnormal pressure/temperature readings. For chemical and petrochemical plants, it controls reactor isolation valves, emergency vent systems, and toxic material shutoff valves to mitigate explosion or leakage risks. In power generation (thermal, nuclear, renewable), it actuates turbine emergency stop systems, boiler safety valves, and cooling system shutdown mechanisms during critical faults. The module is also used in pharmaceutical manufacturing for batch process safety interlocks, mining operations for hoist/conveyor emergency stops, and water/wastewater treatment plants for chemical dosing shutdown systems—all scenarios where system failure could result in human harm, environmental damage, or catastrophic equipment loss.

Technical Specifications