Barnett Engineering ProTalk Plus B1290 - Adding an Expander

site, the B1290 isprogrammed toaccept remote alarminputs onalarms 1, 2,
and 3, and is connected to a telephone.
When one of the remote units is alarmed, it will send its alarm ON output
code over the radio. This code will be interpreted as a remote alarm input
code at the central unit. This will initiate the B1290 to send its alarm report
over radio and telephone. As part of its alarm sequence over radio, the
B1290 will send its alarm On output code. This code will be interpreted as
an acknowledgment by the remote, and it will stop sending the alarm. The
central unit will continue to report over radio and telephone until it is ac
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knowledged.
Example 10: Adding an Expander
Inthisexample,youareaddinganexpandertoaB1290toincreasethenum
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ber of alarm inputs and relay outputs.
Installand programthe mainB1290 unitas perthe instructions inthis man
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ual. Installthe expanderin alocation veryclose to theB1290. Complete the
wiring to all the alarms and relays. Connect the cablesupplied with the ex
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panderfromtheauxiliary connectorontheB1290to the SERIALINconnec
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tor on the expander. Apply power to the installation
Theexpanderis programmedfrom theB1290. Notethat whentheProgram
Code is entered, it is preceded by the number of the expander.
63 Programming Examples
Figure 7 Concentrating Remote Alarms