Operating and Maintenance Instructions : FCU 2110-5 / FCU 2210-5
Edition 1.10
HYDAC Filtertechnik GmbH
Page 21 of 52
5.6.3 Relay Functions
Function mode
Relay 1
Relay 2
M1: Measure
Contacts 7 and 8 are closed
when measurement has started
and is ongoing.
Contacts 6 and 8 are closed
when the FCU is not in service.
Contacts 14 and 15 are
closed when a flow rate
error has been detected
M2: M switch
Has to be set to flow rate / fall
below /
↓
149 ml
↑
150ml to
open internal shut-off valve !
Contacts 14 and 15 are
closed when the user has
programmed valid setting
values.
Contacts 13 and 15 are
closed when the user has
programmed invalid setting
values.
M3: Filter to
Contacts 7 and 8 are closed
when measurement has been
started and the measured
values (purity ratings) are not
within the range (limits)
programmed by the user.
Contacts 6 and 8 are closed
when 5 measurements in a row
are identical to the limit
programmed by the user or are
below it.
Not in operation
M4: Filter from to
Contacts 6 and 8 are closed
when 5 measurements in a row
are identical to the limit
programmed by the user or are
below it.
Contacts 7 and 8 are closed
when:
−
Measurement has been
started and the
measurement results of the
purity rating are below the
lower limit specified by the
user.
−
Measurement cycle is in
progress and the
measurement results of the
purity ratings are above the
upper limit specified by the
user.
Not in operation