A300 Power and Signal Converter
3
5.3 Using With 3.3 V Serial Sensor
The A300 can be used to provide data line level shifting and a regulated 3.3 V
power supply for some serial devices such as serial sensors that need to be
connected to a datalogger that does not support 3.3 V power or communication
levels. Example dataloggers include the CR800-series, CR1000, and CR3000.
TABLE 5-3. Sensor Wiring to A300 Terminals
and Datalogger Terminals
Sensor
A300 Terminal
3.3 V Power In
3.3V PWR
Ground
G
TxD (Output)
3.3V IN
RxD (Input)
3.3V OUT
TABLE 5-4. A300 Cable Wiring to Datalogger Terminals
A300 Wire Colo
u
r A300 Wire Function
Datalogger
Red
12 V
12V
Black
Ground
Ground
Green
5 V Signal Input
Tx (Output)
White
5 V Signal Output
Rx (Input)
5.4 Mounting
The A300 provides several features to aide in installation. It provides a tie-
down loop for securing the sensor cable to the A300 with a zip tie. It also
provides two mounting holes for securing the A300 to the backplate of an
enclosure.
