The Triconex 9852 is a 32-point Digital Output (DO) Module designed for high-integrity Triple Modular Redundant (TMR) safety systems. It is engineered to provide fail-safe control for discrete field devices such as solenoid valves, relays, and motor starters in SIL3 environments.
Specifications
Output Points: 32 points, non-isolated from each other (shared common).
Nominal Voltage: 24 VDC, with an operational range of 18 to 30 VDC.
Output Current: Maximum of 2.0 Amps per point at 60°C; total module current load must not exceed10.0 Amps.
Off-State Leakage: Less than 2.0 mA, preventing low-wattage devices from remaining energized when commanded off.
On-State Voltage Drop: Maximum of1.5 VDC at 2.0 Amps, ensuring efficient power delivery to field loads.
Surge Current: Capable of handling up to 10 Amps for 10 milliseconds to accommodate inductive inrush.
Isolation: Optically isolated to 1500 VDC (field-to-logic) and 2500 VDC (field-to-chassis).
Power Consumption: Approximately 10 Watts (internal) plus the external field load requirements.
Features
Triple Modular Redundancy: Employs internal 2-out-of-3 (2oo3) voting logic across three independent legs (A, B, and C) to verify the integrity of every output command.
Online Replacement: Supports Hot-Swapping, allowing a technician to replace a faulted module while the process is active without compromising the safety function.
Comprehensive Self-Testing: Performs automated "Glitch Tests" to verify the switching capability of output transistors without changing the state of the field device.
Load Supervision: Provides integrated Open-Circuit and Short-Circuit detection, alerting the DCS or SIS operator to field wiring faults immediately.
Fail-Safe Design: Engineered so that no single internal hardware failure can result in a "fail-to-function" scenario, adhering to strict global safety standards.
Front-Panel Diagnostics: Includes high-visibility LEDs for Pass, Fault, and Active status, along with individual indicators for each of the 32 output points.
