
pRack +040000071 rel. 1.1 - 14.10.2011
29
ENG
I/O List
Digital outputs
NO1
Screw compressor 1, line relay
NO2
Screw compressor 1, part winding
NO3
Screw compressor 1, CR1 valve
NO4
Screw compressor 1, CR2 valve
NO5
Screw compressor 2, line relay
NO6
Screw compressor 2, part winding
NO7
Screw compressor 2, CR1 valve
NO8
Screw compressor 2, CR2 valve
NO9
Fan 1
NO10
Alarms output
Digital inputs
ID1
Suction HP pressostat
ID2
Suction LP pressostat
ID3
Compressor 1, generic alarm
ID4
Compressor 1, oil fl ow warning
ID5
Compressor 2, generic alarm
ID6
Compressor 2, oil fl ow warning
ID7
Common fan overload
ID8
Condenser inverter alarm
Analog outputs
Y1
Common condenser inverter
0...10 Vdc
Analog inputs
B1
Suction pressure probe
4...20 mA
-0.5...7.0 barg
B2
Condensing pressure probe
4...20 mA
0.0...30.0 barg
B3
Suction temperature probe
NTC
B4
Discharge temperature probe
HTNTC
B5
External temperature probe
NTC
Tab. 2.t
Main parameters
Parameter
Mask index
Value
Suction regulation by
Cab01
PRESSURE
Suction regulation type
Cab01
NEUTRAL ZONE
Suction setpoint
Cab03
3.5,barg
Suction diff erential
Cab08
0.3 barg
Compressors rotation type
Caf10
FIFO
Refrigerant
Caf04
R404A
High suction pressure alarm threshold
Cae24
6.0 barg
Low suction pressure alarm threshold
Cae26
0.0 barg
Condenser regulation by
Dab01
PRESSURE
Condenser regulation type
Dab01
PROPORTIONAL BAND
Condenser setpoint
Dab03
12.0 barg
Condenser diff erential
Dab07
2.0 barg
High condenser pressure alarm threshold
Dae01
24.0 barg
Low condenser pressure alarm threshold
Dae03
7.0 barg
Tab. 2.u