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AGRI-ALERT WIRELESS MODULE rev.04
AGRI-ALERT WIRELESS MODULE
3 SERIAL BUS INTERFACE (SBI) CONNECTIONS
3.1
Connecting Devices to the Wireless module
The serial bus interface is used to connect different Agri-Alert devices together.
A shielded twisted pair cable is recommended for this purpose
. Each device includes
four terminals marked SERIAL BUS and numbered from 1 to 4. Connect all the number
1 terminals together, all the number 2 terminals together, etc. as shown in figure 8.
SBI Maximum Load = 500mA.
A maximum of 6 devices (excluding the Wireless Module)
can be connected to the serial bus (SBI).
Maximum distance between a wireless module and any device= 500 ft.
3.2
End of Line Jumpers
Identify the first and the last device
on the communication loop by select-
ing the “YES” position with the end
of line jumpers. For other devices, place
the jumper at the NO position.
END OF LINE
NO
END OF LINE
NO
END OF LINE
YES
Serial Bus
1
2 3 4
Wireless module
KPB-400
Serial Bus
1 2 3 4
Serial Bus
1 2 3 4
TP-800
Serial Bus
1 2 3 4
LB-9600
END OF LINE
YES
Figure 8 Example of End of Line Jumper Positions and SBI Connections
RADIO
M
END OF LINE
SBI
COMMUNICATION
TERMINALS
J8
END OF LINE
Figure 7 Location of the End of Line Jumper
and Communication Terminals
