Controlled Products Systems Group CVT-OPTW - Manual (Page 4)

Data 1 IN
Ground
Data 0 IN
If voltage levels other than 5 volts are required at the output, then do not connect the
internal pullup resistors. The outputs are now open collector and will work with voltages
from 5 to 24 VDC. Depending on the system, pullup resistors to the higher voltage may be
required.
Previous versions of the CVT-OPTW had internal pullup resistors internal connected to the
output ports. These pullup resistors were wired to the +5VDC supply. This newer version
provides the option of connecting the pullup resistors in order to allow connection as a
true open collector output.
With the pullup resistors connected as indicated in the above diagram, the new OPTW is
equivalent to the previous version.
Data 1 OUT
Data 0 OUT
+5 VDC
Ground
Data 1 OUT
Data 0 OUT
+5 VDC
Ground
Data 1 IN
Ground
Data 0 IN