Installing Accessories 51
Cat. No. 01021161
Auxiliary Input (Optional)
One auxiliary input is provided for optional signal devices such as remote push buttons, differential pressure switches,
hardness monitors, turbid meters, etc. for the purpose of receiving a regeneration signal. The Aux Input can also be con-
figured as an external alarm trigger.
To provide a regeneration signal, select an UNPOWERED contact within the remote device that will close when regenera-
tion is desired. The duration of the switch closure can be as low as 0 seconds; 6 seconds is the recommended minimum
and default but can be as long as 999 seconds. The contact must automatically open following the start of a regeneration
sequence. Connect this contact to the Aux In terminal shown in Figure 37. The illustration below is an example of how to
use an external source (with duplex alternating current) to initiate regeneration.
To use as external alarm trigger, select an UNPOWERED contact within the remote device that will close when the alarm
condition exists. The duration of the switch closure can be as low as 0 seconds; 6 seconds is the recommended minimum
and default but can be as long as 999 seconds.
NC NO
1
POLE
NC NO
2
POLE
C
C
SOL
Regen Signal
EXTERNAL
SOURCE
24V DPDT
RELAY
DUPLEX ALTERNATING WITH EXTERNAL SOURCE
SOL
Communication Cable
01016327
Figure 37. Auxiliary input.
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