Operating and Maintenance Instructions : FCU 2110-5 / FCU 2210-5
Edition 1.10
HYDAC Filtertechnik GmbH
Page 15 of 52
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flow rate meter
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supply voltage
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internal evaluation module
Relay 3 (normally closed contact) thus functions as a DEVICE READY contact:
During normal (fault-free) operation, these contacts are always closed,
meaning they only open when a fault is detected.
When a fault or malfunction occurs, an error message automatically appears in the display and
data recording/saving is interrupted.
As soon as the error is remedied, this is recognized by the microprocessor, which resets the
error message completely automatically, thus causing the contacts of relay 3 to close and
measurement and data saving to be resumed.
This ensures that, in the event malfunction occurs during continuous online operation, e.g. as
the result of a power outage, flow errors as the result of pressure loss, etc., measurement
operation is resumed without any operating personal being required after the fault has been
remedied.
All the measured values taken and recorded can be outputted via the RS232 interface (11) ,
e.g. using a PC.
The integrated printer (14) is used to document the measurements in the form of a table or
graphic.