Description
ICS Triplex T8222
Technical Specifications & Performance Parameters:
- DC Input Range: 20 VDC ~ 30 VDC, dual independent input channels
- Nominal Input Voltage: 24 VDC
- DC Output: Regulated 24 VDC
- Maximum Continuous Output Power: 200 W
- Maximum Output Current: 8.3 A
- Output Voltage Tolerance: ±1 %
- Protection Mechanisms: Over‑current protection, over‑voltage protection, reverse‑polarity input protection, short‑circuit auto‑shut‑off
- Safety Certification: TÜV IEC 61508 SIL 3, UL, CE
- Operating Temperature: ‑20 °C ~ +60 °C
- Storage Temperature: ‑40 °C ~ +85 °C
- Ambient Humidity: 5 %‑95 % RH non‑condensing
- Weight: 1.05 kg
- Form Factor: Standard Trusted rack plug‑in module
Functional Features:
- Dual‑redundant 24 VDC input design, automatic load sharing between two input branches
- Hot‑swap support for online module replacement without interruption of I/O power supply
- Comprehensive channel‑level diagnostics, detect input loss, output over‑load, reverse‑polarity connection and internal over‑temperature
- Front‑panel LED indicators show input channel status, output status and module fault alarm
- Timestamped fault‑event upload to system fault historian via IMB backplane bus
- Built‑in reverse‑input protection circuit, resist damage caused by field‑side wiring polarity error
- Short‑circuit auto‑recovery mechanism after fault condition clearance
- Galvanic isolation between input power domain and rack internal I/O power distribution domain
Working Principle: Two separate 24 VDC DC power sources feed into T8222 dual input terminals. Internal OR‑ing power circuit implements automatic load sharing for two input branches. Regulator circuit delivers stable 24 VDC output to rack backplane I/O power rail. Monitoring circuit continuously samples input voltage, output current and internal component temperature. When over‑current, reverse‑polarity or over‑temperature fault occurs, module triggers hardware protection and generates timestamped fault alarm. Single DC input branch failure does not break output power delivery to I/O modules.
Material Composition & Structural Characteristics:
- Housing: Die‑cast aluminum alloy shielding shell for electromagnetic interference suppression
- Circuit substrate: Multi‑layer FR‑4 industrial printed circuit board, integrate power OR‑ing and protection semiconductor components
- Backplane connector: Gold‑plated high‑density anti‑vibration industrial connector
- Front panel: Flame‑retardant engineering plastic with LED indicator group, IP20 protection grade
- Card‑type plug‑in structure for Trusted rack dedicated power‑supply‑slot installation
Installation Requirements:
- Insert T8222 module into dedicated DC power‑supply slot of Trusted rack chassis, fasten front‑panel locking screws
- Two input DC power connect to two independent upstream 24 VDC power supply units to achieve true redundancy
- DC power wiring adopt shielded power cables, separate routing from high‑voltage AC power cables
- Cabinet protective ground resistance ≤4 Ω
- Ensure sufficient cabinet air‑flow for module heat dissipation
- Total rack I/O load power shall not exceed module rated output power
Application Scenarios:
- Trusted system I/O module rack 24 VDC power distribution
- ESD safety system field transmitter and solenoid valve loop power supply
- Fire‑gas detection system field sensor power feeding
- Chemical plant safety interlock cabinet DC redundant power distribution
- Off‑shore platform distributed I/O rack DC power unit
Usage Notes:
- Hot‑swap operation is permitted only when dual DC input paths maintain valid power supply
- Module shell disassembly is forbidden, no field‑serviceable internal spare parts
- Strictly avoid reverse‑polarity connection during DC input wiring
- After module replacement, verify dual‑input redundancy switching performance and output‑load capacity
- Operate strictly within rated operating temperature range
- Periodically inspect DC input terminal fastening torque and field‑loop load‑current status
