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Connecting the Modules Together Through the Serial Bus Interface
Different types of modules can be used to add inputs to an Agri-Alert system. Each module has four termi-
nals marked as Serial Bus Input that are numbered from 1 to 4. All modules are connected together
through a serial bus interface (SBI) in series, not in parallel.
1. Using four shielded, twisted pair cables, connect two modules together through the SBI making sure
the same numbered terminals are wired together.
2. Set the last module in the communication line's end of line jumper, located on the module's top
board, to YES.
3. Set all other end of line jumpers to NO on the module's top board.
Configuring a Zone
Place the jumper in the position of the sensor being used
There are three jumper positions for each zone. The first position, called DRY/TEMP, is for dry con-
tact (normally closed with or without EOLR/ DEOLR; normally open with or without EOLR/ DEOLR)
and temperature inputs. The second position is for 4-20mA inputs and the third is for 0-5V and AC
current sensor inputs. Only one jumper is used to configure each zone. Initially, all zones are config-
ured for DRY/TEMP.
The zone numbers are printed on the main board. Use caution when prying the jumpers loose.
IMPORTANT: when you add an EOLR to a circuit, the resistor must be connected to the sensor that
is furthest from the Agri-Alert system. When using a double end of line resistor, a max-
imum of three zones can be connected on the same circuit.
Example of zone six configured as a 4-20mA input
895-00397 TP-800
Chapitre 1: Connections and Configuration
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