Technical Specifications Memory Capacity:128MB high‑speed shared memory Backplane Power Consumption:310mA @5VDC Redundancy Interface:Dedicated high‑speed differential signal port Isolation Voltage:1500V RMS Operating Temperature:0℃～+60℃ Storage Temperature:-40℃～+85℃ Relative Humidity:5%‑95%, non‑condensing Certifications:CE, UL, cUL
Functional Features 128MB shared redundancy memory, high‑speed real‑time data mirroring between dual CPUs, runtime variable synchronization, redundancy status monitoring, front‑panel communication‑fault LED indication, reduce switch‑over data loss during primary CPU failure.
Application Scenarios RX3i hot‑standby redundant control system, high‑availability process industry control cabinet, key production equipment requiring zero‑downtime switch‑over function.
Performance Parameters High‑speed redundancy data transmission Low‑latency variable mirroring Shock & vibration:Comply with IEC 60068
Structural Characteristics Standard RX3i plug‑in rack module Front‑panel LED indicators for synchronization, link and fault status Dedicated high‑speed redundancy signal connector Backplane gold‑finger bus contact Internal large‑capacity high‑speed memory chip group Mechanical locking latch
Working Principle RMX128 connects to primary CPU and standby CPU via backplane bus and dedicated redundancy cable. Real‑time runtime variables, I/O image and system status data from primary CPU are written into shared memory space. Standby CPU continuously reads mirrored data from RMX128 module. When primary CPU fault occurs, standby CPU holds complete runtime data to realize bumpless system switch‑over without data loss.
Installation Requirements Install module into designated redundancy slot of RX3i redundant rack. Complete cabinet protective grounding. Use official dedicated redundancy signal cable to connect paired RMX128 modules. Power‑off rack before module replacement. Keep redundancy cable separated from high‑voltage power cables. Maintain cabinet heat‑dissipation ventilation.
Usage Notes Must work in pairs inside redundant system. Check redundancy cable connection tightness regularly. Diagnose synchronization abnormality through front‑panel LED indicators. On‑site disassembly is prohibited. Prevent dust accumulation, corrosive gas and liquid splash.
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