Technical data

20 • XM670K-XM679K I&O Manual 026-1218 Rev 0 19-DEC-2012
10 Digital Inputs
The XM600 series of controllers can support up to
three (3) configurable digital inputs that are free of
voltage contact (depending on the models). They are
configurable via i#F parameter.
10.1.Generic Alarm (EAL)
As soon as the digital input is activated, the con-
troller will wait for the did time delay before signal-
ing the EAL alarm message. The outputs status don’t
change. The alarm will stop as soon as the digital in-
put is deactivated.
10.2.Serious Alarm Mode
(bAL)
When the digital input is activated, the controller
will wait for the did time delay before signaling the
bAL alarm message. The relay outputs are switched
OFF. The alarm will stop as soon as the digital input
is deactivated.
10.3.Pressure Switch (PAL)
If the pressure switch has reached the number of
activation of the nPS parameter during the interval
time set by the d#d parameter, the CA pressure alarm
message will be displayed. The compressor and the
regulation are stopped. When the digital input is ON
the compressor is always OFF. If the
nPS activation
in the d#d time is reached, switch the controller OFF
and ON to restart normal regulation.
10.4.Door Switch Input (dor)
This input signals the door status and the corre-
sponding relay output status through the odc parame-
ter: no = normal (any change); Fan = Fan OFF; CPr
= Compressor OFF; F_C = Compressor and fan OFF.
Since the door is opened, after the delay time set
through parameter d#d, the door alarm is enabled, the
display shows the message dA, and the regulation re-
starts after rrd time. The alarm stops as soon as the
external digital input is disabled again. With the door
open, the high and low temperature alarms are dis-
abled.
10.5.Start Defrost (dEF)
A defrost will start if the right conditions exist. Af-
ter the defrost is finished, normal regulation will re-
start only if the digital input is disabled; otherwise, the
controller will wait until the MdF safety time is ex-
pired.
10.6.Relay Aux Actuation
(AUS)
This function enables the auxiliary relay to be
turned ON and OFF by using the digital input as ex-
ternal switch.
10.7.Relay Light Actuation
(LiG)
This function enables the light relay to be turned
ON and OFF by using the digital input as external
switch.
10.8.Remote ON/OFF (OnF)
This function switches the controller ON and OFF.
10.9.Kind of Action (Htr)
This function enables the change in the kind of
regulation: from cooling to heating and vice versa.
10.10.FHU (Not Used)
This function enables the change in the kind of
regulation: from cooling to heating and vice versa.
10.11.Energy Saving Input
(ES)
The Energy Saving function allows you to change
the setpoint value as the result of the SET+ HES (pa-
rameter) sum. This function is enabled until the digi-
tal input is activated.