Techsphere VP-II X User Manual page 46

VP-II X generates a standard Wiegand interface signal, the maximum distance to connect a Wiegand
device is 150m (500ft) when using 22AWG which is perfectly shielded or is composed of 5 twisted pairs.
The communication distance may be shortened depending on the cable specification.
AUX
These are TTL level (+5V) digital input/output ports to interface with external systems. Two input and
output ports are provided. These ports can be used for access grant signal input from a PACS, fire alarm
input, verification failure/success output to use as an external indicator such as large LED or lamps, etc.
However, these functions are not included in the standard product, and will be provided with a
customized firmware upon request.
SERIAL A / B
Serial port A is used for connecting the VP-II XG door controller. Connections are as follows:
Serial port B is reserved for future uses.
RS-485
In case that the distance between VP-II X and VP-II XG is over 15 meters, the RS485 interface can be
used. However, an RS485 driver which is not installed by default has to be additionally installed inside
both the VP-II X and VP-II XG. The RS485 driver is separately provided. Consult with the product
provider.
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