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8.3.2 Modbus Communication
Modbus protocol communication is operational on all models. The Modbus information is
covered in a separate manual.
8.4 Flow Alarm
The flow switch for the S200 TUr is a factory-installed option. This option indicates a
“Low Flow” condition by switching bot
h relays to the fail state and setting the 4-20 mA
signal to 2 mA. There is also a screen indication of the low flow condition and a modbus
register is set.
8.5 Flow Controller
The flow controller limits the flow, in high-pressure systems, to safe
flow limits of less than 1 liter/minute.
8.6 Remote Panel Meter
The remote panel meter allows for remote indication of the NTU reading using the 4-20
mA loop. No external power is required as the meter is run off of the 4-20 mA source.