Technical Specifications Port Quantity:2×10Mbps RJ45 Ethernet ports Protocol Support:SRTP, Modbus‑TCP Backplane Power Consumption:360mA @5VDC Isolation Voltage:1500V RMS Operating Temperature:0℃~+60℃ Storage Temperature:-40℃~+85℃ Relative Humidity:5%‑95%, non‑condensing Certifications:CE, UL, cUL
Functional Features Dual 10Mbps Ethernet ports, independent coprocessor communication processing, multiple industrial Ethernet protocol support, communication fault diagnosis, front‑panel link‑activity‑fault LED status display.
Application Scenarios Series 90‑70 PLC network communication expansion, SCADA upper system connection, HMI network data interaction, legacy industrial control system network transformation.
Performance Parameters Independent Ethernet protocol processing Network link fault diagnostic capability Shock & vibration:Comply with IEC 60068
Structural Characteristics Standard Series 90‑70 plug‑in rack module Front‑panel multi‑LED indicators for link, activity and fault Dual RJ45 Ethernet connectors Backplane gold‑finger bus contact Internal Ethernet coprocessor and protocol processing circuit Mechanical locking latch
Working Principle CMM742 exchanges data with Series 90‑70 CPU through backplane bus. On‑board independent coprocessor completes Ethernet protocol stack parsing and data packaging. Dual RJ45 physical ports realize data sending and receiving with external network equipment. Module detects network abnormality and reports fault information to main CPU.
Installation Requirements Install module into available slot of Series 90‑70 chassis. Complete cabinet protective grounding. Assign IP address for Ethernet ports by programming software. Deploy shielded twisted‑pair Ethernet cables. Power‑off rack before module replacement. Separate network cables from high‑voltage power lines.
Usage Notes Avoid IP address conflict within local control network. Diagnose network faults according to front‑panel LED status. Forbid on‑site disassembly. Prevent corrosive gas and liquid splash.














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