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5.5 SAFETY AND CONFIGURABLE DIGITAL INPUTS – FREE
VOLTAGE
5.5.1 Loads safety inputs
Controller has 7 configurable digital inputs, free voltage.
Each digital input can be set by the related parameter iF01,.. iF07.
The digital inputs are factory pre-set to operate as safety input for loads and as HP and LP. This
input has to collect the status of the safety devices related to the compressor such as thermistors,
pressure switches etc.
When this input is activated the correspondence load is switched off and not considered for the
regulation.
The correspondence between loads (compressors or fans) and safety inputs is the following
LOAD
TERMINALS
Load 1
15-17/19
Load 2
16-17/19
Load 3
18-21/22
Load 4
20-21/22
Load 5
25-26
5.5.2 Circuit with 1 SUCTION and 1 CONDENSER: HP – LP Pressure
switch connections
The controller is preset to manage also the low pressure switch and the high pressure switch,
both the inputs are free voltage.
Connect the pressure switches as described in the following table.
PRESSURE SWITCH
LP
HP*
* The digital input 6 (31-32) requires the adapter CABCJ15 or CABCJ30 to be used.
See par. 4.2 CABCJ15 or CABCJ30: 2 PIN connectors
5.5.3 Circuit with 2 SUCTIONS and 1 CONDENSER: HP – LP Pressure
switch connections
In case of racks with 2 suction circuits and 1 condenser the LP1, low pressure switch, and HP
high pressure switch, can be connected to the terminals 10-11 and 31-32 as explained in the
previous paragraph.
To manage the LP2 low pressure switch of circuit 2, a configurable digital input has to be set
as LP2.
E.I. If the digital input 7 is use (33-34) the setting is iF07 = LP2.
5.5.4 Additional function of the digital input 7 (33-34)
The digital input 7 can operate also as probe.
To enable this function set P4C as NTC or PTC.
5.6 Analog output connection
The controller supply up to 2 analog outputs, terminals, kind of output and functionality are shown
in the following table
1592001431 XC650CX GB r3.5 21.07.2020
INPUT
TERMINALS
Di1
10-13
Di2
10-14
Di3
10-11
Di4
10-12
Di7
33-34
INPUT
TERMINALS
Di5
10-11
Di6
31-32
SETTING
iF01 = oA1
iF02 = oA2
iF03 = oA3
iF04 = oA4
iF07 = oA5
SETTING
iF05 = LP1
iF06 = HP
XC650CX
11/56
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