Page 6
Interlocked Output
Triggered by a High Level
This mode of operation is the inverse of
the previous one. In this mode the input
signal reaching the high trip point
energises Relay ‘B’ which will not switch
off until the low trip point is reached (see
Fig 3).
Setting up
To set up the unit to operate with an
interlock triggered by a High Level:
1. Ensure Link 5 is set correctly
(see page 4)
2. Set SW.A to Low (‘L’)
3. Set SW.B to High (‘H’)
The front panel controls function as
follows:-
¨
For the Low Set Point use the control
for Trip Point ‘A’
¨
For the High Set Point use the control
for Trip Point ‘B’
Relay ‘B’ is energised during the interlock
period.
Low Trip Point
High Trip Point
Input Signal
Ý
Relay ‘A’
Relay ‘B’
on
off
on
off
Fig 3 Interlock set by High Level
Interlocked period
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