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• IEC-61850-3 compliant
• Wide operation temperature support from -20 ~70°C
• Supports both sink and source type input
• Rated voltage input value: 24 VDC
• ±70 VDC over voltage protection
• Input characteristic curve according to IEC 61131, type 1
• Each digital channel has its own status LED
• Isolation between channels and backplane
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