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Electrical Interface
LRP2000 Passive Reader/Writer
30
Figure 24: Input from Sourcing Contact
Figure 24 shows the switch on the high side with the low side grounded. As this is a “Dry” contact (the
current is limited to 15 mA), a high-quality sealed switch should be used.
Figure 25: Input from Sinking Contact
Figure 25 shows a switch connected on the low side with the high side connected to the positive supply.
This also requires a high-quality sealed contact.