Danfoss AK-CC55 Compact - External Display AK-UI55; Connections

Refrigeration is resumed at the same time when all controllers have terminated defrost.
External display AK-UI55
Figure 44: External display AK-UI55
Danfoss 84B8235
(Total length: max. 100 m)
Connections
Table 9: Connection details
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 signicant pressure drops be-
tween the evaporators to be controlled. See Figure 42: AKS 32R info.
AI2 - AI5
Primarily for temperature inputs
• S2
Pt 1000 ohm sensor AKS11, placed at the evaporator outlet
• S3, S4, S5
Pt 1000 AKS11, PTC 1000 EKS111, NTC5K EKS211 or NTC10K EKS221 sensor or a user-dened sensor type. All have to be of the same
type.
• S3, 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 conguration)
• S5, defrost sensor, placed in the evaporator
(If the DI1 input is used for a temperature measurement, it will appear as AI5.))
DI1
Digital input signal
The dened function is active when the input is short-circuited or opened, depending on the function dened in o02.
DI2
Digital input signal
The dened function is active when the input is short-circuited or opened, depending on the function dened in o37.
AO1
Analogue output signal
• Analogue 0 – 10 V (currently not used)
• Pulse width modulated signal
Can be used for fast pulse control of rail heat via an external power solid state relay.
MODBUS
For data communication:
• Terminal 83 = B-
• Terminal 84 = A+
• Terminal 85 = screen
Supply voltage
230 V AC or 115 V AC
DO1
• AKV valve:
Connection of expansion valve type AKV, AKVA, AKVH or AKVP.
The coil must be a 230 V or 115 V AC coil
• Compressor:
Connection of a relay. The coil must be a 230 V or 115 V AC coil. Max. 0.5 A.
• Solenoid valve:
The coil must be a 230 V or 115 V AC coil. Max. 0.5 A.
DO2
• Alarm:
There is a connection between terminal 10 and 12 in alarm situations and when the controller is without power.
DO2 has reinforced insulation that can be used with 24 V.
• Light, Rail heat, Compressor/Liquid line valve:
There is connection between terminal 10 and 11 (10 and 12 at light) when the function is ON.
DO3
• Fan:
There is connection between terminal 13 and 14 when the fan is ON.
DO4
• Defrost:
There is connection between terminal 15 and 16 when defrosting takes place.
DO2-DO4 + AO1 and
Application 4 / 9
Here, the dierent outputs can be custom dened in q02-q09
© Danfoss | Climate Solutions | 2022.08 BC365212986197en-000201 | 31
AK-CC55 Compact