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Instructions
- D epending on the frequency converter
version, the physical position of individual
connectors may differ from below diagram.
- A lways make sure that the compressor termi-
nals T1, T2, T3 are connected to the frequency
converter terminals 96, 97, 98 respectively.
- T he compressor motor cable must be shielded
L1
91
L1
L2
92
L2
L3
93
L3
95
PE
39 39 Ana out COM
42 42 Ana out +
50 50 Ana in +10 V
53 53 Ana in 0 ± 10 V
54 54 Ana in 0 ± 10 V
55 55 Ana in COM
12 12 +24V
13 13 +24V
18 18 Dig in
19 19 Dig in
27 27 Dig in/out
29 29 Dig in/out
32 32 Dig in
33 33 Dig in
20 20 Dig in COM
37 37 Dig in
91, 92, 93:
3 Phase mains input
95:
Earth
39, 42
Analogue output
50:
Analogue input
53:
PLC+ (0 to 10 V)
54:
Sensor -
55:
PLC-
12:
HP/LP switch
12:
External On/Off (NO)
13:
Factory bridged to 37
13:
Sensor +
18:
External On/Off (NO)
19:
Digital input
27:
HP/LP switch (NC) / safety devices
29:
Digital input/output
32, 33
Digital input
20:
Digital input Common
37:
Factory bridged to 13
98:
To compressor terminal T3
97:
To compressor terminal T2
96:
To compressor terminal T1
99:
To compressor earth connection
02, 01:
Relay 1 to oil solenoid valve
06, 05, 04:
Relay 2
69, 68:
RS485 Bus
61:
RS485 Bus Common
-
Optional connection
4
Basic connections
and the armoured part must be connected to
ground on both cable ends; at the side of the
compressor and at the side of the frequency
converter.
- U se an EMC cable gland for cable installation and
perfect grounding; The metallic terminal box of
the compressor has a paint-free surface around
W
PE
NC
NO
COM
NC
NO
COM
N- RS485 69 69
P+ RS485 68 68
COM RS485 61 61
Open loop
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X : Mandatory connection
FRCC.EI.005.A3.02 © Danfoss Commercial Compressors 09/10
98
T3
V
97
T2
U
96
T1
99
03
230 V
02
～
01
2 A max
06
05
04
Process loop
X
X
-
-
-
-
-
-
X
-
X
X
X
-
X
X
-
-
X
-
-
-
-
-
-
X
X
X
X
X
X
-
-
-
-
-
-
the connection hole for better conductivity.
- A low pressure safety switch is mandatory
to avoid compressor vacuum operation.
- A t start-up, verfiy that the compressor rotates
in the right direction and pumps.
Legends:
Ana:
Analogue
Dig:
Digital
in:
Input
out:
Output
COM:
Common
NC:
Normally-closed
NO:
Normally-open
The CDS302 frequency converter is factory pre-
set with parameters for the open loop control
principle. The process loop control principle
can be selected by changing parameters in the
«Quick menu».
Open loop:
0 - 10 V control
Frequency converter in slave mode
Process loop:
4 - 20 mA control
Frequency converter under own PID controller
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