KROHNE LEVEL-SONIC BM90 Series Installation And Operating Instructions Manual page 20

Pr. 20 Relay 5 Designation - Basic Application - Relay Function
Relay 5
Designation
Enter 0
1
2
3
4
5
6
7
8
Pr. 21 Relay 5 Set
Pr. 22 Relay 5 Reset
Level/Differential
Enter values in display unit as
selected Pr. 2.
Flow Enter values in unit selected at
Pr.46
Temperature Enter values in C
( o n l y v a l i d i f p r o b e f i t t e d )
Sampler Enter value in hours
(no reset needed)
Totalizer Refer to Pr.49
Loss of Echo No set/Reset entries are required
or run/prog
Pr.23 to 27 Failsafe (D=3 for all)
On loss of power all relays will de-energise.
For other fault conditions e.g. damaged transducer, the
failsafe relay state (after time delay selected at Pr. 29) is
selectable.
20
Pr. 1 = 1 / Pr.1 = 2
Level / Distance
O f f
Level Alarm ( e )
Level Control ( d )
O f f
O f f
O f f
Temperature Alarm ( e )
Loss of Echo ( e )
Run / Prog ( e )
( e ) normally energised
de-energised to alarm
Pr. 1 = 3
Differential
N / A
N / A
N / A
N / A
N / A
N /A
N / A
N / A
N / A
Pr. 23 Relay 1
Failsafe)
Pr. 24 Relay 2 )
Failsafe
Pr. 25 Relay 3 )
Failsafe
Pr. 26 Relay 4 )
Failsafe
Pr. 27 Relay 5 )
Failsafe
Note : Relay designated LOSS-OF-ECHO will always
de-energise.
Relay 5 Failsafe is not applicable in differential or OCM
mode.
Pr. 28 Analogue and Display Failsafe (D=3)
Enter 1 Low
2 High
3 Hold Value
Pr. 29 Failsafe Time Delay (D=120)
Enter value (in seconds) before unit goes to selected fail-
safe positions.Minimum value is 30 seconds.
Pr. 1 = 4
Open Channel Flow
O f f
Level Alarm
Level Control
Flow Alarm
O f f
Totalizer Drive
Temp. Alarm
Loss of Echo
Run / Prog
( d ) normally de-energised
energise to start (motor)
Enter 1 Energise
2 De-energise
3 Hold-state
one option for each relay
( e )
( d )
( e )
( d )
( e )
( e )
( e )