Danfoss AK-PC 351 User Manual page 15

I/O configuration
Here you can see which outputs and inputs your settings have established.
The connection points shown cannot be changed, but the analog input measurements can be adjusted.
Digital outputs
1:
2:
3:
.
6:
Digital inputs
1:
2:
3:
..
8:
Analog outputs
1:
2:
Analog inputs
1:
2:
3:
4:
.
I/O Status
Digital outputs
1:
.
6:
Digital inputs
1:
.
8:
Analogue outputs
1:
2:
Analog inputs
1:
.
4:
I/O Summary
DO: Max 6, Used:__
DI: Max 8, Used:__
AO: Max 2, Used:__
AI: Max 4, Used:__
I/O Manual control
Digital outputs
Analog outputs
AK-PC 351
On/off outputs
The outputs are set up automatically in the following order:
a) If a PWM output is needed, place it on DO6
b) Compressors and unloader valves from DO1 and above
c) Next, fans
d) Alarm
(One output can be on or off with an activated relay.)
On/off inputs
The following connection points are fixed and cannot be changed:
DI1-4 = Safety input for the respective compressor. DI5 = Safety input for fans. DI6 = External
start/stop. DI7 = Night signal or LP switch. DI8 = General alarm or HP switch.
(The function can be active when the input is connected or disconnected.)
Analog outputs
AO1 can be used to control the speed of a compressor.
AO2 can be used to control the speed of fans.
When a function is chosen, the output signal will be 0-10 V.
Analog inputs
The inputs are automatically set up
AI1: Sc3 outdoor temperature sensor, Pt 1000 ohm
AI2: Sd discharge sensor, Pt 1,000 ohm or NTC 86K ohm
AI3: S4 temperature sensor, Pt 1000 ohm or Po pressure transmitter: See the type. See sen-
sor's lower pressure. See the sensor's upper pressure.
AI4: S7 temperature sensor Pt 1000 ohm or Pc pressure transmitter: See the type. See sensor's
lower pressure. See the sensor's upper pressure.
(A type AKS 2050 pressure transmitter, for high pressure, emits a signal as an AKS 32R.)
All measurements can be calibrated if necessary.
Status of on/off outputs
Here you can see if the function is on or off.
(PWM for a digital scroll must be connected to DO6. The pulsing signal will be able to be seen
as an alternating on/off signal)
Status of on/off inputs
Here you can see the status of the input signal.
Status of analogue outputs
Here you can see the size of the output signals as a % of max. signal.
Status of analogue inputs
Here you can see pressure and temperature values received by the controller.
The values include calibration
Inputs and outputs used
Here you can see how many of the different inputs and outputs are available.
You can also compare this amount with how many have been configured.
If too many have been defined, an exclamation mark (!) will appear.
Manual control of a relay output
Under normal regulation, the function of the relay will be in "Auto".
In the event of an override, the function will be switched to either "On" or "Off".
Remember to switch to "Auto" when the override is to be completed.
Manual control of analogue output
During normal regulation, the function of the output will be "Auto".
In the event of an override, the function must first be changed to "Manual",
after which the output signal can be changed from 0-100%.
Remember to switch to "Auto" when the override is to be completed.
User Guide RS8GZ302 © Danfoss 2015-06
On
Off
On
Off
Auto / On / Off
Auto / Man
0-100%
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