GPIO Terminal Block User’s Guide 19
Switching the Low Side Using Reader Power
For low side switching applications, lamp power is routed to all the
lamps in common and the low side of the load is routed to the switch.
To configure an output terminal for low side switching, use the
jumper to short the -Output and Ground posts together as shown in
the next illustration.
Switching the Low Side of the Output Load
+12 V
+Output
Reader interface
External
indicator lamp (max. 2)
0.25 A maximum
Note: In this configuration the indicator LED for the output terminal
is disabled and may create some confusion with maintenance activity.
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