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The Unicom 2500 provides RS485/RS232 conversion. In doing so it allows a Shark 100 with the
RS485 option to communicate with a PC. See the Unicom 2500 Installation and Operation Manual
for additional information.
Figure 5.8 illustrates the Unicom 2500 connections for RS485.
Figure 5.9: Detail of "Jumpers"
Figure 5.8: Unicom 2500 with Connections
The Unicom 2500 can be configured for either 4-wire or 2-wire RS485 connections. Since the Shark
100 uses a 2-wire connection, you need to add jumper wires to convert the Unicom 2500 to the
2-wire configuration.
As shown in Figure 5.9, you connect the "RX -" and "TX -" terminals with a jumper wire to make
the "B(-)" terminal,and connect the "RX +" and "TX +" terminals with a jumper wire to make the
"A(+)" terminal.
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Electro Industries/GaugeTech
5-6
Doc #: E145701
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