Electrical data, connections and wiring
Wiring connections
230V or 24V
～
2 A max
R
E
LA
Y
1
L1
91
L1
U
96
T1/U
L2
92
L2
V
97
T2/V
L3
93
L3
W
98
T3/W
95
PE
PE
99
39
Ana out COM
42
Ana out +
50
Ana out +10 V
NC
53
Ana in 0 ± 10 V
NO
02
54
Ana in 0 ± 10 V
COM
01
55
Ana in COM
NC
06
NO
05
12
+24V
COM
04
13
+24V
18
Dig in
19
Dig in
27
Dig in/out
29
Dig in/out
32
Dig in
N- RS485
69
33
Dig in
P+ RS485
68
20
Dig in COM
COM RS485
61
37
Dig in
R
E
LA
Y
2
C
D
S3
03
Legends:
Ana: Analogue
Dig: Digital
in: Input
out: Output
COM: Common
NC: Normally-closed
NO: Normally-open
Open loop
Process loop
91, 92, 93
3 Phase mains input
X
X
95
Earth
X
X
39, 42
Analogue output
-
-
50
Analogue output
-
-
53
PLC+ (0 to 10 V)
X
-
54
Sensor -
-
X
55
PLC-
X
-
12
HP/LP switch
X
X
12
External On/Off (NO)
X
X
13
Factory bridged to 37
X
X
13
-
X
18
External On/Off (NO)
X
X
19
Digital input
-
-
27
LP switch (NC) / safety devices
X
X
29
Digital input/output
-
-
32, 33
Digital input
-
-
20
Digital input Common
-
-
37
Factory bridged to 13 / HP switch
X
X
98
To compressor terminal T3
X
X
97
To compressor terminal T2
X
X
96
To compressor terminal T1
X
X
99
To compressor earth connection
X
X
02, 01
Relay 1 to oil solenoid valve
X
X
06, 05, 04
Relay 2
-
-
69, 68
RS485 Bus
-
-
61
RS485 Bus Common
-
-
-: Optional connection
X: Mandatory connection
The CDS303 frequency converter is factory
preset 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: preset on input 53
0 - 10 V control
Frequency converter in slave mode
Process loop: preset on input 54
4 - 20 mA control
Frequency converter under own PID controller
T37 is CE and UL approved for STO, Safety Torque
Function
38
FRCC.PC.023.A8.02
Application Guidelines
