8.9 ISOLATED DIGITAL INPUTS
Opto-isolated digital inputs (opto-inputs)
Compliance ESI 48-4
Rated nominal voltage 24 to 250 V dc
Operating range 19 to 265 V dc
Withstand 300 V dc
Recognition time with half-cycle ac
immunity filter removed
< 2 ms
Recognition time with filter on < 12 ms
8.9.1 NOMINAL PICKUP AND RESET THRESHOLDS
Nominal Battery voltage Logic levels: 60-80% DO/PU Logic Levels: 50-70% DO/PU
24/27 V Logic 0 < 16.2 V : Logic 1 > 19.2 V Logic 0 <12.0 V : Logic 1 > 16.8
30/34 Logic 0 < 20.4 V : Logic 1 > 24.0 V Logic 0 < 15.0 V : Logic 1 > 21.0 V
48/54 Logic 0 < 32.4 V : Logic 1 > 38.4 V Logic 0 < 24.0 V : Logic 1 > 33.6 V
110/125 Logic 0 < 75.0 V : Logic 1 > 88.0 V Logic 0 < 55.0 V : Logic 1 > 77.0 V
220/250 Logic 0 < 150 V : Logic 1 > 176.0 V Logic 0 < 110.V : Logic 1 > 154.0 V
Note:
Filter is required to make the opto-inputs immune to induced AC voltages.
MiCOM P747 Chapter 16 - Technical Specifications
P747-TM-EN-1 399
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