11
115159H - LV I/O OPTION
Isolated switched output with the I/O Board option:
This solution uses an I/O Board option to wire one of the I/O Board outputs with
an isolated input to detect the wall switch.
To wire this switched output solution with only one output of the I/O Board:
Connect the load for the switched output to the
C
connection.
Connect the
emergency backup line
to the
NO
connection.
Connect the switched utility line to an input of the I/O Board.
Connect the switched utility neutral to the same input of the I/O Board.
After wiring is completed, the input needs to be set to
Switched Input
in the I/O
settings menu in the display. This causes the output contact to switch whenever
there is a 90-277Vac voltage across the input connection of the I/O Board, or the
LV Series unit goes into emergency backup.
Figure 5.3
Special considerations:
This switched output solution is completely isolated. Any 90-277Vac
signal, regardless of phase, can be used to toggle the switched output without
damaging the LV Series unit.
A resistive dimmer can not be used to replace the wall switch with this
solution. The input detects either an on or off situation and a resistive dimmer
may cause the output contact to pulsate rather than dim.
When selecting
Switched Input
for the input I/O setting, the output
function of the corresponding output I/O is tied directly to the corresponding
input. This output will be locked, and it will be impossible to change this output
function without first changing the input setting to something other than
Switched
Input.
For example, setting input 1 of the I/O board to
Switched Input
locks
output 1.
