Emerson EC2-552 - Digital Inputs for Safety and Configuration

OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX 10/54
5.4 Load connections
!!!WARNING: Digital Scroll valve coil MUST operate at main voltage (24 VAC)!!
NOTE:
Main voltage side (6 PINs connector): the PIN 17 is the common line for all the relay outputs
and for the TRIAC.
5.5 Safety and configurable digital inputs – free voltage
Loads safety inputs
!!!WARNING: free voltage 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 INPUT TERMINALS SETTING
Load 1
15-17
Di1
10-13
iF01 = oA1
Load 2
16-17
Di2
10-14
iF02 = oA2
Load 3
18-17
Di3
10-11
iF03 = oA3
Load 4
20-17
Di4
10-12
iF04 = oA4
Load 6
21-22
Di7
27-28
iF07 = oA6
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 INPUT TERMINALS SETTING
LP
Di5
10-9
iF05 = LP1
HP*
Di6
25-26
iF06 = HP
Note: *) The digital input 6 (25-26) requires the adapter CABCJ15 or CABCJ30 to be used.
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24VAC