Technical Specifications Backplane Power Consumption:290mA @5VDC Redundancy Link Rate:High‑speed dedicated redundancy bus Isolation Voltage:1500V RMS Operating Temperature:0℃～+60℃ Storage Temperature:-40℃～+85℃ Relative Humidity:5%‑95%, non‑condensing Certifications:CE, UL, cUL
Functional Features Primary‑standby redundancy management, real‑time synchronization status monitoring, bumpless switch‑over logic control, redundancy fault diagnosis, status LED indication, coordinate dual‑CPU redundant operation.
Application Scenarios RX3i hot‑standby redundant control system, critical process high‑availability control cabinet, projects adopting IC695CPU315 / CPU320 series redundant CPU.
Performance Parameters Fast redundancy fault detection speed Reliable switch‑over logic control Shock & vibration:Comply with IEC 60068
Structural Characteristics Standard RX3i plug‑in rack module Front‑panel multi‑LED indicators for redundancy running and fault state Dedicated redundancy link terminal interfaces Backplane gold‑finger bus contact Internal redundancy logic processing circuit Mechanical locking latch
Working Principle CRU320 communicates with primary CPU and standby CPU via dedicated redundancy link and backplane bus. Continuously monitors synchronization status and health condition of two CPU units. When primary CPU fault is detected, CRU320 triggers predefined switch‑over sequence, completes bumpless transfer of system control authority to standby CPU, and records redundancy fault events.
Installation Requirements Insert module into designated redundancy slot of RX3i redundant main rack. Complete cabinet protective grounding. Connect dedicated redundancy cables strictly according to hardware manual. Power‑off rack before module replacement, hot‑swap not supported. Maintain cabinet ventilation heat dissipation.
Usage Notes Must match compatible redundant CPU model. Check redundancy link cable tightness regularly. Observe front‑panel LED for redundancy status diagnosis. Forbid on‑site disassembly. Prevent dust accumulation, corrosive gas and liquid splash.
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