Technical Manual
Page 10
4.4 Pressure Sensor Connection
The pressure sensor must be connected to
terminal X01 of the DCO using an earth
screened, twisted pair (0.25mm
2
minimum),
cable no greater than 100m (330ft) in length.
4-20mA
100m (330ft) max
Ai1
+C
2
1
X01
Wire polarity is important.
4.5 Compressor Interface PCB
The ‘mi-PCB’ is designed to interface a
compressor with the DCO using a 3-wire
(0.5mm
2
minimum), cable no greater than 30m
(100ft) in length.
Compressor
1
2
3
4
DCO 2:
X04
X05
-
-
DCO 3:
X04
X05
X06
-
DCO 4:
X04
X05
X06
X07
Each compressor in the system must be
assigned a unique identification number from 1
up to the number of compressors in the
system. The identification number should be
clearly indicated on each compressor for
operational reference.
For each compressor connected to the DCO
utilising an ‘mi-PCB,’ the signal wires must be
connected to the DCO terminals dedicated for
the assigned compressor reference number.
3 2 1
8 7
4 5 6
R1
35mm
DIN
76
34
28
The ‘mi-PCB’ is a 35mm DIN rail mountable
module designed to be installed within the
compressor control or switchgear area.
Each compressor must be equipped with a
load/unload regulation system and, if not
regulated with a single electro-mechanical
pressure switch, have a facility for a remote
load/unload control with the ability to accept a
volt-free switching contact input for remote
load/unload regulation.
Consult the compressor manual or your air
compressor supplier/specialist for details
before installing the DCO.
The ‘mi-PCB’ is equipped with ‘volt-free’
switching relay contacts for load/unload output
and an input for Alarm or Alarm/Running
detection.
30m
(100ft)
max
1
2
3
GN
D
mi-PCB
1
2
3
0.5 - 1.5mm
2
1
X04:
2
X05:
3
X06:
4
X07:
3:
2:
1:
Alarm
Load
24VDC
0VDC
7
8
1
3
6
5
4
240V '
CE
'
115V '
UL
'
GND
LOAD
4A
NO
C
NC
mi-PCB
2
Di
4 5 6
4 5 6
