User's Manual

Table Of Contents
CHAPTER 3
Configuring the devices
19
If you have a special passive extender cable, you can use it to plug
more than one sensor to one connector.
 CAUTION To avoid cabling conflicts, first verify in the A840/A850
Configurator software that the sensor combination in the
configuration you want is allowed. If there are no conflicts, you can
physically attach the sensors to the addIT RTU.
addIT RTUs can also be used to control actuators and to switch on
or off pumps, valves, or other similar devices. The RTU also has a
POWER connector. Figure 4 illustrates the connections available at
the POWER connector.
Figure 4. addIT RTU POWER Connector (Top View)
 WARNING The RxD and TxD connections are not RS-232
compatible.
This configuration allows the use of external power supplies or
extra batteries (contact Adcon for further details).
Configuring the devices
You can use a Windows Hyperterminal window to connect to
either addIT device. After you have installed the system, follow
these steps to configure the device:
Note: To configure the A723 Series 4 RTU, you must have the spe-
cial adapter cable (available from Adcon) and plug it into the
POWER connector.
1. Open a Hyperterminal window.
2. Select the appropriate serial port and click OK.
3. Configure your terminal as follows:
19200 baud
1 stop bit
8 data bits
RxD
TxD
Ground
Battery
1
2
3
4
5
Ext Power