Technical Specifications Model: CMA198 System Compatibility: ABB Synpol‑D control rack Digital Input Channels: 64‑channel digital input Digital Output Channels: 64‑channel digital output Signal Type: 24 V DC discrete switch signal Galvanic Isolation: Optocoupler isolation between field side and control logic side Power Supply: Supplied by Synpol‑D rack internal backplane bus Operating Temperature: ‑20 ℃ to +60 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Mounting Type: Synpol‑D standard rack plug‑in board Protection Class: IP20 Certifications: CE
Functional Features Provides large‑capacity 64‑channel digital input and 64‑channel digital output expansion for Synpol‑D system. Each signal channel adopts optocoupler galvanic‑isolation design to eliminate field ground‑loop interference. Built‑in RC filter circuit suppresses contact bounce and high‑frequency interference pulse. Converts field switch status signal into internal logic signal and transmits to main control board via rack backplane bus. Receives logic control commands from main control board and drives output channel to complete field switch control. Front‑panel LED indicator group displays real‑time status of each input and output channel. Supports hot‑swap under system permitted maintenance condition. Plug‑in rack‑mount mechanical structure simplifies spare‑part replacement work.
Application Scenarios Synpol‑D steam turbine control system digital I/O expansion spare‑part replacement. Power plant turbine auxiliary equipment mass discrete signal acquisition and interlock control cabinet. Large‑scale thermal power unit retrofitting and control‑system capacity expansion project.
Installation Requirements Align CMA198 circuit board with Synpol‑D rack slot guide rail, insert board fully in place and lock board‑edge spring buckle. Connect field‑site digital signal cables to front‑side screw‑type terminals, tighten terminals to specified torque value. Complete cabinet protective earthing in strict accordance with Synpol‑D system grounding specifications. Separate digital‑signal cables and high‑power power cables inside control cabinet. Reserve sufficient ventilation heat‑dissipation space around module slot. Ambient operating temperature shall keep within ‑20 ℃ ~ +60 ℃ without condensation phenomenon.
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