Campbell CS451 Manuale Scaricare il pdf (Pagina 17)

CS451/CS456 Submersible Pressure Transducer

7.1.1.3 Powering the Sensor

The A200 provides power to the sensor when it is connected to a PC’s USB

port. An internal DC/DC converter boosts the 5 Vdc supply from the USB

connection to a 12 Vdc output is required to power the sensor.

7.1.1.4 Determining which COM Port the A200 has been Assigned

When the A200 driver is loaded, the A200 is assigned a COM port number.

This COM port number is needed when using the Device Configuration Utility

or a PC terminal software such as HyperTerminal.

Often, the assigned COM port will be the next port number that is free.

However, if other devices have been installed in the past (some of which may

no longer be plugged in), the A200 may be assigned a higher COM port

number.

To check which COM port has been assigned to the A200, watch for the

appearance of a new COM port in the list of COM ports offered in the software

package (e.g., LoggerNet) before and after the installation, or look in the

Windows Device Manager list under the ports section (access via the control

panel).

FIGURE 7-1. A200 Sensor-to-PC Interface

TABLE 7-2. A200 Wiring

Color

Sensor

Cable Label

A200

Terminal

Red 12V +12Vdc

Black G G

White C Tx

Blue G Rx

Yellow G G

Clear Signal Ground G

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Campbell CS451 Manuale Pagina 17