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Connections
40 41 42
43 44
45 46
s
5V
AI2
AI3
AI1
115 - 230V AC
L
N
7
1
2
3
Overview of outputs and applications
Application
DO1
DO2
1
2
3
4
5
suction
6
7
8
•
9
See also wiring diagrams earlier in the instruction.
1) Custom set-up of relays
AI1
Pressure transmitter
AKS 32R
Connect to terminal 40, 41 and 42.
(Use cable 060G1034: Black=40, Brown=41, Blue=42)
The signal from one pressure transmitter can be received by up to
10 controllers. But only if there are no significant pressure drops
between the evaporators to be controlled. See drawing on page 5.
Please note: when replacing AK-CC550 with AK-CC55, S and
ground must be switched.
AI2 - AI7
Primarily for temperature inputs
S2
Pt 1000 ohm sensor AKS11
S3, S4, S5
Pt 1000 AKS11, PTC 1000 EKS111, NTC5K EKS211 or NTC10K
EKS221 sensor. All have to be of the same type.
S3, return air sensor, placed in the warm air before the evaporator
S4, discharge air sensor, placed in the cold air after the evaporator
(the need for either S3 or S4 can be selected in the
configuration)
S5, defrost sensor, placed on the evaporator
S6, Pt 1000 ohm sensor
(If the Di1 input is used for a temperature measurement, it will
appear as AI7.)
6 | AN294432763974en-000201
47 48
49 50
51 52
53 54
AI4
AI5
AI6
DI1*
DO2
DO3
8
9
10 11 12
13 14
DO3
DO4
DO5
DO6
drain
hotgas
B
A
humidity
•
•
•
•
1)
1)
1)
1)
1)
60 61
70 71
DI2
AO1
PWM
DO4
DO5
15 16 17
18 19 20
AO1 AI1 AI2 AI3 AI4 AI5 AI6
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
•
Pe
S2
S3
S4
DI1
Digital input signal.
The defined function is active when the input is short-circuited or
opened, depending on the function defined in o02.
DI2
Digital input signal.
The defined function is active when the input is short-circuited or
opened, depending on the function defined in o37.
AO1
Analogue output signal
Analogue 0-10 V (currently not used)
Pulse width modulated signal
Can be used for fast control of rail heat via an external power
solid state relay.
MODBUS
For data communication.
Terminal 83 = B-
Terminal 84 = A+
Terminal 85 = screen
It is important that the installation of the data communication
cable is performed correctly.
See separate literature no. RC8AC902
83 84 85
B
A
MODBUS
DO6
DI3
115-230V AC
21 22
30 31
AI7/
DI2 DI3
DI1
• • •
S5
S6
• • •
S5
S6
• • •
S5
S6
• • •
S5
S6
• • •
S5
S6
• • •
S5
S3B
• •
S5
S3B
S5B
• •
S5
S6
RH%
• • •
S5
S6
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