Triconex 3626X is a 32-channel TMR digital output module exclusively designed for the Tricon CX safety control system. It supports both supervised and unsupervised operation modes and matches a 16-channel common field terminal board. Optimized for safety interlock applications of energize-to-trip and de-energize-to-trip, the module can only be mounted in Tricon CX I/O expansion chassis. Complying with high safety standards IEC 61508 / IEC 61511, it serves as a core output component for ESD emergency shutdown and F&G fire & gas protection systems in high-risk industries including petrochemical, oil & gas and power generation.
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Product Advantages
TMR Triple Modular Redundancy Architecture: Three-channel parallel processing with hardware voting. Single-point faults do not disrupt outputs to sustain safe operation and meet high availability requirements of SIS.Per-channel Configurable Supervision: Supervision function programmable per channel; adjustable threshold for open/short-circuit detection enables precise fault pinpointing and high diagnostic coverage.Self-protected Maintenance-free Design: Built-in protection against overvoltage, overcurrent, overtemperature and back EMF for output switches; no field-side fuses required to cut maintenance expense.High Isolation & EMI Immunity: Continuous 400 Vrms field-to-logic isolation plus 1500 VDC / 60s dielectric withstand for stable performance under harsh industrial electromagnetic interference.High Current Driving Capacity: 1.70A±10% per channel; total module output up to 20A to directly drive solenoid valves, indicators and relays.Low Off-state Leakage & Voltage Drop: Off-state leakage＜4.0mA and low on-drop, ensuring reliable load operation for long cable runs.
Key Specifications
| Item | Parameter |
|---|---|
| Channels | 32CH, common field power |
| Rated Voltage | 24VDC nominal; 20.4–28.8VDC recommended |
| Max Operating Voltage | 28.8VDC, overvoltage limit:32VDC |
| Per-channel Current | 1.70A±10%, surge 5A/7ms |
| Total Output | 10A per terminal board; max 20A per module |
| Min Off-state Load | 10mA/100μs |
| Off-state Leakage | ＜4.0mA |
| Logic Power | ＜8W |
| Isolation | 400Vrms continuous;1500VDC/60s withstand |
| Diagnostic Refresh | 100ms cycle |
| Diagnostic Pulse | Typ.200μs, max 2ms |
| LED Indicator | Pass/Fault/Active/Load, independent per-channel green/yellow LED |
| Compatible Terminals | 9662X‑610RF,9671X‑610RF,9671X‑810RF(16CH);9666X FET(32CH) |
Application Scenarios
ESD Emergency Shutdown System: Safety interlock outputs for valves and actuatorsF&G Fire & Gas System: Trip interlock for fire protection and gas detection linkageCompressor & Turbine Safety Control: Output for anti-surge and overspeed protectionOil, Gas & Refining: Unit safety interlock and shutdown controlPower & Energy Industry: Generator set and auxiliary equipment protectionLong-distance Pipeline & Stations: ESD emergency shutdown and regulator station interlock
Installation & Operation Guide
Installation Requirements
- Only install in Tricon CX I/O expansion chassis (e.g. 8131X)
- Must pair with 9666X FET connector and designated ETP terminal boards
- Each terminal board PS+/PS- powered by one redundant field power supply; cross-power-source connection prohibited
Wiring Specifications
- Common field power bus: all channels energized once power is applied
- Disable individual field supply monitoring via TriStation for non-Ex ETP boards to avoid false fault alarms
- Strictly separate positive/negative power, load and ground wiring to prevent short circuits
Configuration Steps
- Add 3626X module and assign I/O addresses in TriStation
- Set per-channel parameters: supervised/unsupervised mode, open/short detection thresholds, trip logic
- Download project; verify Pass/Fault/Active/Load status via on-board diagnostics
Diagnostics & Maintenance
- Front panel LEDs: Green = channel status; Yellow = field/load fault alarm
- Fault auto-reporting; hot-swap replacement available without system downtime
- Periodic inspection for power, wiring and ambient temperature; no consumable parts for scheduled replacement
FAQ
Q1: Can 3626X be fitted into standard legacy Tricon chassis?No. It exclusively fits Tricon CX I/O expansion chassis and is incompatible with conventional Tricon main chassis.
Q2: Are field fuses mandatory?Not required. Output circuitry integrates built-in OV/OC/OT protection, eliminating fuses on field terminal boards.
Q3: Are the 32 channels powered individually?No. All channels share a common field power supply; full-channel energization follows single-source power-on, requiring unified power layout.
Q4: Is long-distance wiring available?Yes. Typical voltage drop:＜1.21VDC at 250mA for 10ft cable;＜2.80VDC at 250mA for 99ft cable. Voltage drop rises under heavy load; calculate drop per actual load.
Q5: How to fix TriStation field power fault alert?Disable independent field supply monitoring in TriStation for non-Ex 9671X ETP boards; enabled function will cause false fault alerts.
Q6: Max load capacity per channel?1.70A continuous, 5A surge for 7ms; directly drives most solenoid valves, indicators and small relays.
Q7: Is hot-swap replacement available for faulty modules?Yes. TMR design allows online module replacement without interrupting system operation or output status.
Q8: Does off-state carry residual current?Max off-state leakage＜4.0mA, meeting low-power and reliable shutdown specifications.
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