Bluelab Dosetronic Peridoser Kit - Manual (Page 19)

15
Version P1.3 : 151012
Bluelab Dosetr
onic P
eridoser Kit
Bluelab Corporation Limited Bluelab Corporation Limited
2.12 Wiring Alarm and External Lockout
External alarm
To connect an external alarm to your system, put a
wire on each side of the closing contacts marked EXT
ALARM.
Note: The external alarm needs to have an
independent power source.
External lockout
To enable the external lockout function on the
Dosetronic, a switch needs to be connected to the
external lockout wiring terminal on the alarm circuit
board (see diagram on page 14). There are two
types of switches that can be wired in: those that are
normally open and those that are normally closed.
For example: If you connect a fl ow switch (that opens
when water stops fl owing) to the normally closed port,
the external lockout function will sense that the water
has stopped and stop your system from dosing.
Common
Normally Closed
Normally Open
Connect multiple normally
closed switches in series
Connect multiple normally
open switches in parallel
2
- +
EXT ALARM
Refer to specifi cations for
maximum power rating
Parallel
Series
COM
NC
NO
COM
NC
NO
Note: You can have both NC and NO combinations connected
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