20
Setting up universal input modes
Set the two universal inputs to one of the modes in the following table. To configure an input mode, specify if the
input is a binary input or an analog input and indicate the level of input that equates to the true condition.
Table 11: A5xx Controller universal input modes and controller actions
Mode Action when
condition is true
Description
None None The status of the universal input has no effect on the controller.
Refrigerant leak System shutdown The system remains shut down as long as the refrigerant leak condition persists.
A system shutdown takes priority over the normal control of the compressor,
defrost, and fan relays.
Man-in-room
Select one of the
following options
for this input
mode.
Normal control This option indicates that relays R1 to R4 remain unaffected.
System shutdown This option takes priority over the normal control of the compressor, defrost, and
evaporator fan relays.
Low-speed fan
(if running at high
speed)
This option becomes available only if the controller is configured with the two-
speed evaporator fan option. This option takes priority over the normal control of
the evaporator fan relays.
Energize auxiliary
relay
This option becomes available only if the two-speed fan option is unused.
Door open
Note: Select one
of the
following
options for
this binary
input
mode.
Normal control This option indicates that relays R1 to R4 remain unaffected.
Low-speed fan This option becomes available only if the control is configured with the two-speed
evaporator fan option. This option takes priority over the normal control of the
evaporator fan relays.
Shut off cooling This option takes priority over the normal control of the compressor relay. The
compressor relay remains off until the state clears.
Energize auxiliary
relay
The system shuts down when it detects an input change from false to true. The
system remains shut down until the switch clears. A system shutdown takes
priority over the normal control of the compressor, defrost, and evaporator fan
relays.
Emergency
switch (wall)
System shutdown The system shuts down when it detects an input change from false to true. The
system remains shut down until the switch clears. A system shutdown takes
priority over the normal control of the compressor, defrost, and evaporator fan
relays.
Table 12: A5xx Controller universal inputs and mode selections
Universal
input
Mode selection Binary or analog Binary true state Analog true state
UI 4 • None or unused
• Refrigerant leak
• Man-in-room
• Door open
• Emergency switch
BIN/ARY or ANA/LOG OP/EN or CLO/SED > nnn (enter the voltage)
UI 5 BIN/ARY or ANA/LOG OP/EN or CLO/SED > nnn (enter the voltage)
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