Danfoss AK-PC 351 User Manual page 18

Connections
Connection, lower level
Supply Voltage.
24 V a.c. or 24 V d.c.
DO - Digital outputs, 6 pcs. DO1 - DO6
DO6 is solid state relay.
The relays are de-rated to the specified values.
If an alarm relay is defined, it will be driven under normal op-
eration and it will drop in the event of alarms and insufficient
power to the controller.
DO
DO1-DO5
I Max. 5 A
(2)
U All 24 V or
all 230 V AC
AKS 32R
AKS 32
AKS 33
18
All 24 V or
all 230 V a.c.
Warning
The supply voltage of AI may
not share the signal with
other controllers.
DO6
0.5 A
min. 50 mA
Ioff < 1.5 mA
10-90% ratiometric
1-5 V
0-20mA
4-20mA
User Guide RS8GZ302 © Danfoss 2015-06
Connection, upper level
AI - Analogue inputs, 4 pcs. AI1 - AI4
AI1- Sc3: Pt 1000 ohm, AKS 11 or AKS 21.
AI2 - Sd compressor 1: NTC 86K ohm @ 25°C, from digital scroll
or Pt 1000 ohm
AI3: Presure transmitter Po or temperature sensor S4, Pt 1000
ohm
AI4: Pressure transmitter Pc or temperature sensor S7, Pt 1000
ohm
Pressure transmitters
• Ratiometric: 10-90% of supply, AKS 32R / AKS 2050
• Signal: 1-5 V, AKS 32
• Current: 0-20 mA / 4-20 mA, AKS 33 (supply = 12 V)
DI - Digital switch inputs, 8 pcs. DI1 - DI8
The connection may be a shut-down or interruption function.
Select what is to be activated during configuration.
DI1-4: Safety circuits, compressor 1, 2, 3 and 4
DI5: Safety circuits, condenser fans
DI6: External Main Switch
DI7: Night signal or LP switch
DI8 General alarm or HP switch
AO - Analogue output, 2 pcs. AO1 - AO2
Must be used when using a frequency converter or EC motors.
Obtain 0-10 volts from terminals COM and AO1 (compressor),
respectively COM and AO2 (fans).
Modbus
It is important that the installation of the data communication
cable be done correctly. Cf. separate literature No. RC8AC.
Remember termination at the bus termination.
AK-PC 351