User manual

Digital Monitor AMC-1DBx Series User Manual
85
• Coverage – ensure it will physically monitor
the intended area.
• Airflow – ensure it is not mounted under any
air intake ducts.
• Wiring – the RS-485 wiring is a bus. Long
stubs are not permitted.
• Conduit – ensure that the wiring is in EMT.
• Powering – is the power supply appropriately
sized? After voltage drops in the wiring, will
there remain sufficient voltage for the
transmitter to operate?
See the transmitter specifications.
• Access – ensure the transmitter is located
where service personnel can have access
for calibration purposes.
Mount the transmitter housing to a solid structure
(i.e. a wall) at nose height.
Run the wiring to the Transmitter.
• If the transmitter is added in the middle of
the bus, be aware that while the bus is
“opened” to add a new transmitter, the
monitor will be able to communicate with
transmitters on the same side of the open.
• If the transmitter extends the bus and
becomes the new end unit, ensure the bus
termination is removed from the previous
end unit. The new unit must be strapped to
provide bus termination.
3. Configure the
MODBUS address on
the transmitter.
• If the transmitter has been ordered with the
correct MODBUS address factory
configured, this step will not be required.
• If the transmitter has been taken from
inventory or service stock, then the
configured MODBUS address contained
within it is likely not correct. Determine the
correct MODBUS address to be employed
(see the monitor configuration) and
configure it into the transmitter. For as long
as an incorrect MODBUS remains
configured in the transmitter, monitor
indications may be that a previously
serviceable transmitter is experiencing
communication problems due to the
duplicate MODBUS address.
4. Add configuration
• Use the Select Sensor menu to configure the