Technical Specifications Multiple field signal input‑output terminals, internal system communication interface, auxiliary DC control power supply. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, relative humidity 5%‑95% non‑condensing. Conformal coating PCB anti‑corrosion treatment. Independent chassis mounting mechanical form.
Functional Features Expands total number of analog and digital signal channels for turbine control system. Performs electrical isolation and level conversion for field‑side input‑output signals. Completes bidirectional signal data exchange with main control chassis through dedicated communication interface. Provides hardware surge protection for each field signal channel. Supports module‑level hardware self‑diagnosis and fault status reporting.
Application Scenarios Spare replacement field expansion module for GE Mark series turbine control systems, used for power plant turbine control system channel expansion and equipment maintenance.
Performance Parameters Stable multi‑channel signal isolation performance, reliable signal level conversion accuracy, high‑reliable communication data exchange with main control chassis.
Material Composition Metal module housing. Multilayer glass‑fiber epoxy printed circuit board assembly, signal isolation components, signal conditioning chips, surge protection devices. Multi‑pin communication and field‑wiring connectors. Conformal protective coating layer. Chassis mounting fixing hardware.
Structural Characteristics Independent metal‑enclosed module assembly. Pre‑drilled mounting holes for fixed installation inside equipment cabinet. Internal layout separates field high‑interference signal zone and system communication logic zone.
Working Principle Module receives auxiliary DC control power supply. Field analog and digital signals enter module terminals, pass through isolation and level conversion circuit. On‑board monitoring circuit tracks each signal channel operating status.
Installation Requirements Complete mechanical fixation of DS2020FEXAG4 inside equipment cabinet. Finish field‑side signal wiring and main‑system communication cable connection. Restore auxiliary power supply, carry out module power‑on self‑test and signal channel function verification.
Usage Notes Input auxiliary power voltage must conform to rated specification. Keep cabinet ventilation passages unobstructed for heat dissipation. Avoid mechanical scratch damage to PCB conformal coating layer.
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