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PRODUCT MANUAL - BARIX X8 - V01.05 - 10/26/2006
Each BARIX X8 I/O can be set to work either as input or output.
External device TTL level I/Os can be attached to the I/Os and to
signal ground as shown in the schematic below.
TTL level output
TTL level input
GND
O4
I0
One WIEGAND device (keypad, reader) can be interfaced by
connecting output D0 to I/O6 and output D1 to I/O7 which are
both inputs by default.
+Vsupply
Vsupply
WIEGAND
D0
DEVICE
D1
GND
The WIEGAND interface is enabled by setting Bit 6 of register
274 (Reg. 274 OR 40h).
Connecting the I/O · 13
WIEGAND device
TTL devices on I/O