Description
Technical Specifications
- Product Model: DO3626X
- Brand: TRICONEX
- Warranty: One Year
- Input Voltage: 24 V DC nominal
- Operating Temperature: −40°C to +70°C
- Storage Temperature: −40°C to +85°C
- Response Time: <2–3 ms typical dedicated‑digital‑output scan contribution within Tricon CX TMR logic frames
- Protection Class: IP20
- Accuracy Class: SIL 2/3‑capable when used in Tricon CX‑style SIS with intrinsically safe interface and line‑monitoring schemes
Product Overview
The TRICONEX DO3626X is a Tricon CX Digital Output (DO) module with 16 or 32 supervised outputs, designed for safety‑critical applications where SIL‑rated solenoid valves, ESD relays, and burner‑management or Fire & Gas actuators must be driven from a TMR‑controlled SIS rack. As part of the Tricon CX family, the DO3626X interfaces directly with intrinsically safe GMI isolation and terminal‑board solutions to create a SIL 3‑capable circuit that powers Zone 0/Div. 1 solenoid‑valve loads while monitoring those loads for shorts, opens, or stuck‑on conditions.
Key Functions
SIL‑Compliant Digital Output
The DO3626X delivers fault‑tolerant digital drive to relays or transformer‑coupled loads in Tricon CX‑based safety‑instrumented systems, with three‑channel voting or redundancy upstream and load‑status feedback downstream. This structure supports SIL 2/3 implementations for ESD and HIPPS where each output must either indicate a safe‑state or report a detectable fault rather than failing “silent.”
Load Fault Detection and Monitoring
By pairing the DO3626X with GMI‑type isolators such as D5096S/D5097S or D6001S/D6001D on the TBE‑D5016‑TRI‑007/009 boards, each channel can perform Load Fault Detection (LFD), sensing short‑circuits or open‑wires even when the solenoid is off. These faults mirror back to the DO card and into the Tricon logic, feeding diagnostic alarms or proof‑test confirmation into the PLC‑database‑and‑operational‑log streams.
Application Scenarios
Emergency Shutdown and HIPPS Valves
Refineries and LNG terminals integrate the DO3626X into their Tricon CX ESD and High‑Integrity Pressure Protection Systems, where its channels drive intrinsically‑safe isolation boards that power isolation and safety‑valve solenoids on high‑pressure headers. SIL‑rated line‑monitoring on each circuit lets operators confirm during proof‑tests and periodic audits that every valve‑coil is electrically intact, reducing the chance of an ESD event failing silently due to wiring decay.
Fire and Gas Deluge Systems
Offshore platforms and onshore chemical‑processing units use the DO3626X to command fire‑deluge solenoids and emergency‑venting relays from a centrally‑located Tricon CX Fire & Gas cabinet. The combination of fault‑mirror signals and SIL‑rated isolators supports rapid identification of any disconnected deluge line, which is critical for regulatory‑compliance inspections and incident‑response rehearsals where deluge‑system reliability is non‑negotiable.
Burner Management and Turbine Protection
In power‑plant boiler‑rows and turbine plants, the DO3626X controls fuel‑train solenoid valves, purge‑coils, and burner‑trip latches that require strict interlock execution. By integrating these outputs with GMI‑monitored boards, maintenance teams can verify that each burner‑flame and pilot‑train solenoid has both proper continuity and correct polarity, which reduces nuisance trips caused by marginal‑coil condition or terminal loosening.
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