Table E-1 Rext Values - Lantronix I/O 2100 User Manual

The Rext resistor limits the current I to about 1.5 mA, and Rext is 1/4W.
Figure C-5. Relay Contact position when not energized (power off)
IntelliBox-I/O 2100 User Guide

Table E-1 Rext Values

VOH (V) REXT (K)
7 2.57
8 3.23
9 3.9
10 4.57
11 5.23
12 5.9
13 6.57
14 7.23
15 7.9
16 8.57
17 9.23
18 9.9
19 10.6
20 11.2
21 11.9
22 12.6
23 13.2
24 13.9
25 14.6
26 15.2
72 15.9
28 16.6
29 17.2
30 17.9
E: Isolated I/O Specifications
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